EN 16905-5:2017
(Main)Gas-fired endothermic engine driven heat pumps - Part 5: Calculation of seasonal performances in heating and cooling mode
General Information
- Abstract
1.1 Scope of FprEN 16905 series
This European Standard specifies the requirements, test methods and test conditions for the rating and performance calculation of air conditioners and heat pumps using either air, water or brine as heat transfer media, with gas-fired endothermic engine driven compressors when used for space heating, cooling and refrigeration, hereafter referred to as “GEHP appliance”.
This European Standard only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions.
This European Standard only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P according to EN 437.
This European Standard only applies to appliances having:
a) gas fired endothermic engines under the control of fully automatic control systems;
b) closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated;
c) where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation;
d) where the maximum operating pressure in the:
1) heating water circuit (if installed) does not exceed 6 bar,
2) domestic hot water circuit (if installed) does not exceed 10 bar.
This European Standard applies to appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery.
The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by this European Standard.
Packaged units, single split and multisplit systems are covered by this European Standard. Single duct and double duct units are covered by this European Standard.
The above appliances can have one or more primary or secondary functions.
This European Standard is applicable to appliances that are intended to be type tested. Requirements for appliances that are not type tested would need to be subject to further consideration.
In the case of packaged units (consisting of several parts), this European Standard applies only to those designed and supplied as a complete package.
NOTE All the symbols given in this text are used regardless of the language used.
1.2 Scope of FprEN 16905 5
This part of the FprEN 16905 series specifies the calculation of seasonal performance factor for gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery.
- Status
- Withdrawn
- Publication Date
- 07-Mar-2017
- Withdrawal Date
- 16-Sep-2026
- Technical Committee
- CEN/TC 299 - Gas-fired sorption appliances and domestic gas-fired washing and drying appliances
- Drafting Committee
- CEN/TC 299/WG 3 - Gas-fired endothermic engine heat pumps
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 21-Dec-2022
- Completion Date
- 17-Sep-2026
Relations
- Effective Date
- 23-May-2018
- Refers
EN 16905-1:2023 - Gas-fired endothermic engine driven heat pumps - Part 1: Terms and definitions - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 16905-5:2017 is a standard published by the European Committee for Standardization (CEN). Its full title is "Gas-fired endothermic engine driven heat pumps - Part 5: Calculation of seasonal performances in heating and cooling mode". This standard covers: 1.1 Scope of FprEN 16905 series This European Standard specifies the requirements, test methods and test conditions for the rating and performance calculation of air conditioners and heat pumps using either air, water or brine as heat transfer media, with gas-fired endothermic engine driven compressors when used for space heating, cooling and refrigeration, hereafter referred to as “GEHP appliance”. This European Standard only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions. This European Standard only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P according to EN 437. This European Standard only applies to appliances having: a) gas fired endothermic engines under the control of fully automatic control systems; b) closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated; c) where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation; d) where the maximum operating pressure in the: 1) heating water circuit (if installed) does not exceed 6 bar, 2) domestic hot water circuit (if installed) does not exceed 10 bar. This European Standard applies to appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery. The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by this European Standard. Packaged units, single split and multisplit systems are covered by this European Standard. Single duct and double duct units are covered by this European Standard. The above appliances can have one or more primary or secondary functions. This European Standard is applicable to appliances that are intended to be type tested. Requirements for appliances that are not type tested would need to be subject to further consideration. In the case of packaged units (consisting of several parts), this European Standard applies only to those designed and supplied as a complete package. NOTE All the symbols given in this text are used regardless of the language used. 1.2 Scope of FprEN 16905 5 This part of the FprEN 16905 series specifies the calculation of seasonal performance factor for gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery.
1.1 Scope of FprEN 16905 series This European Standard specifies the requirements, test methods and test conditions for the rating and performance calculation of air conditioners and heat pumps using either air, water or brine as heat transfer media, with gas-fired endothermic engine driven compressors when used for space heating, cooling and refrigeration, hereafter referred to as “GEHP appliance”. This European Standard only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions. This European Standard only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P according to EN 437. This European Standard only applies to appliances having: a) gas fired endothermic engines under the control of fully automatic control systems; b) closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated; c) where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation; d) where the maximum operating pressure in the: 1) heating water circuit (if installed) does not exceed 6 bar, 2) domestic hot water circuit (if installed) does not exceed 10 bar. This European Standard applies to appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery. The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by this European Standard. Packaged units, single split and multisplit systems are covered by this European Standard. Single duct and double duct units are covered by this European Standard. The above appliances can have one or more primary or secondary functions. This European Standard is applicable to appliances that are intended to be type tested. Requirements for appliances that are not type tested would need to be subject to further consideration. In the case of packaged units (consisting of several parts), this European Standard applies only to those designed and supplied as a complete package. NOTE All the symbols given in this text are used regardless of the language used. 1.2 Scope of FprEN 16905 5 This part of the FprEN 16905 series specifies the calculation of seasonal performance factor for gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery.
EN 16905-5:2017 is classified under the following ICS (International Classification for Standards) categories: 27.080 - Heat pumps. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 16905-5:2017 has the following relationships with other standards: It is inter standard links to EN 16905-5:2022, EN 16905-1:2023, EN 16905-4:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 16905-5:2017 is associated with the following European legislation: EU Directives/Regulations: 2009/125/EC, 811/2013, 813/2013; Standardization Mandates: M/495, M/534, M/535. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN 16905-5:2017 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gasbefeuerte endothermische Motor-Wärmepumpen - Teil 5: Berechnung der saisonalen Effizienzkennzahlen im Heiz- und KühlmodusPompes à chaleur à moteur endothermique alimenté au gaz -Partie 5 : Calcul des performances saisonnières en modes chauffage et refroidissementGas-fired endothermic engine driven heat pumps - Part 5: Calculation of seasonal performances in heating and cooling mode27.080Heat pumpsICS:Ta slovenski standard je istoveten z:EN 16905-5:2017SIST EN 16905-5:2018en,fr,de01-januar-2018SIST EN 16905-5:2018SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16905-5
March
t r s y ICS
t yä r z r English Version
Gasæfired endothermic engine driven heat pumps æ Part
wã Calculation of seasonal performances in heating and cooling mode Pompes à chaleur à moteur endothermique alimenté au gaz æPartie
w ã Calcul des performances saisonnières en modes chauffage et refroidissement
Gasbefeuerte endothermische MotoræWärmepumpen æ Teil
wã Berechnung der saisonalen Effizienzkennzahlen im Heizæ und Kühlmodus This European Standard was approved by CEN on
{ January
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x { r wæ wã t r s y ESIST EN 16905-5:2018
Determination of reference annual cooling/heating demands and determination of hours for active mode, thermostat off, standby, off mode and crankcase heater mode for reference SAEFc and SAEFh calculation . 43 Annex B (informative)
Calculation example for reference SGUEc, SAEFc, SEHREgasc, SEHREelecc and SPERc . 45 Annex C (informative)
Calculation example for reference SGUEh, SAEFh, SEHREgash, SEHREelech and SPERh . 48 Annex D (informative)
Adaption of water temperature for fixed capacity . 51 Annex E (informative)
Compensation method for air to water and water to water units . 52 Annex ZA (informative)
Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 813/2013 aimed to be covered . 53 Annex ZB (informative)
Relationship between this European Standard and the energy labelling requirements of Commission Delegated Regulation (EU) No 811/2013 aimed to be covered . 55 Bibliography . 57
Part load ratio Part load ratio % Outdoor air dry bulb temperature °C Indoor air dry bulb (wet bulb) temperatures °C A (35–16)/(Tdesignc-16) 100 35 27(19) B (30–16)/(Tdesignc-16) 74 30 27(19) C (25–16)/(Tdesignc-16) 47 25 27(19) D (20–16)/(Tdesignc-16) 21 20 27(19) 4.3 Water-to-air and brine to air units The part load conditions for determining the reference SGUEc (Formula (2)), SAEFc (Formula (4)), SEHREgasc (Formula (7)), SEHREelecc (Formula (8)) are given in the following table: SIST EN 16905-5:2018
Part load ratio Part load ratio % Outdoor heat exchanger Indoor heat exchanger Cooling tower b
or water loop application Inlet/outlet water temperatures °C Ground coupled application (water or brine) Inlet/outlet water temperatures °C Dry cooler application Inlet/outlet water temperatures °C Air dry bulb (wet bulb) temperatures °C A (35–16)/(Tdesignc-16) 100 30/35 10/15 50/45 27(19) B (30–16)/(Tdesignc-16) 74 26/a 10/a 45/a 27(19) C (25–16)/(Tdesignc-16) 47 22/a 10/a 40/a 27(19) D (20–16)/(Tdesignc-16) 21 18/a 10/a 35/a 27(19) a With the water flow rate as determined during the “A” test. b If a cooling tower and a water-to-air unit are sold as a matched assembly, they shall be tested as an air-to-air unit. 4.4 Air-to-water units For each application, units either allowing or not allowing a variation of the outlet water temperature with the outdoor temperature are considered. The variable outlet temperature shall only be applied when the control provides a regulation of outlet water temperature that considers the outdoor temperature. The part load conditions for determining the reference SGUEc (Formula (2)), SAEFc (Formula (4)), SEHREgasc (Formula (7)), SEHREelecc (Formula (8)) are given in the following table: SIST EN 16905-5:2018
Part load ratio Part load ratio % Outdoor heat exchanger Indoor heat exchanger
Air dry bulb temperature °C Fan coil application Inlet/outlet water temperatures Cooling floor application Inlet/outlet water temperatures °C
Fixed outlet °C Variable outlet °C A (35–16)/(Tdesignc-16) 100 35 12/7 12/7 23/18 B (30–16)/(Tdesignc-16) 74 30 a/7 a/8,5 a/18 C (25–16)/(Tdesignc-16) 47 25 a/7 a/10 a/18 D (20–16)/(Tdesignc-16) 21 20 a/7 a/11,5 a/18 a With the water flow rate as determined during “A” test for units with a fixed water flow rate or with a fixed delta T of 5 K for units with a variable water flow rate. 4.5 Water-to-water and brine-to-water units For each application, units either allowing or not allowing a variation of the outlet water temperature with the outdoor temperature are considered. The variable outlet temperature shall only be applied when the control provides a regulation of outlet water temperature that considers the outdoor temperature. The part load conditions for determining the reference SGUEc (Formula (2)), SAEFc (Formula (4)), SEHREgasc (Formula (7)), SEHREelecc (Formula (8)) are given in the following table: SIST EN 16905-5:2018
Part load ratio Part load ratio %
Outdoor heat exchanger Indoor heat exchanger
Cooling towerb application Inlet/outlet water temperatures °C Ground coupled application (water or brine) Inlet/outlet water temperatures °C Dry cooler application Inlet/outlet water temperatures °C Fan coil application Inlet/outlet water temperatures Cooling floor application Inlet/outlet water temperatures °C
Fixed outlet °C Variable outlet °C
A (35–1 6) / (Tdesignc-16) 100 30/35 10/15 50/45 12/7 12/7 23/18 B (30–1 6) / (Tdesignc-16) 74 26/a 10/a 45/a a/7 a/8,5 a/18 C (25–1 6) / (Tdesignc-16) 47 22/a 10/a 40/a a/7 a/10 a/18 D (20–1 6) / (Tdesignc-16) 21 18/a 10/a 35/a a/7 a/11,5 a/18 a With the water flow rate as determined during “A” test for units with a fixed water flow rate or with a fixed delta T of 5 K for units with a variable water flow rate. b If a cooling tower and water-to-air unit are sold as a matched assembly, they shall be tested as an air-to-air unit. 5 Part load conditions in heating mode 5.1 General For the purpose of calculation of application SGUEh, SAEFh, SEHREgash, SEHREelech and reference SGUEh, SAEFh, SEHREgash, SEHREelech the part load ratios mentioned below should be based on the part load ratio Formulae (1)st column of Tables 4 to 22) and not on the rounded figures as mentioned in the 2nd column of these tables. The calculation of SGUEh, SAEFh, SEHREgash, SEHREelech and reference SGUEh, SAEFh, SEHREgash, SEHREelech is determined via linear interpolation of the respective part load values at the reference part load conditions mentioned below (A, B, C, D). For the purpose of reference SGUEh, SAEFh, SEHREgash, SEHREelech there are three reference conditions: average(A), warmer (W) and colder (C). The relevant Tdesignh values are defined as follows: — Tdesign “average” dry bulb temperature conditions at
« 10
11 °C wet bulb) outdoor temperature and 20 °C indoor temperature; u Tdesign qcolderr dry bulb temperature conditions at
« 22
23 °C wet bulb) outdoor temperature and 20 °C indoor temperature u Tdesign qwarmerr dry bulb temperature conditions at + 2 °C (1 °C wet bulb) outdoor temperature and 20 °C indoor temperature SIST EN 16905-5:2018
« 7 °C or lower; — for the warmer heating season, the dry bulb bivalent temperature is + 7 °C or lower. NOTE If the declared TOL is lower than the Tdesignh of the considered climate, then it is assumed that TOL is equal to Tdesignhä For Tbivalent and TOL higher or equal to
« 7 °C the wet bulb temperature equals the dry bulb temperature minus 1
¹Cä For Tbivalent and TOL below
« 7 °C, the wet bulb temperature is not defined. At any other part load conditions, the declared capacity of the appliance is larger than the building load. 5.2 Air-to-air units The part load conditions for determining the reference SGUEh (Formula (11)), SAEFh (Formula (13)), SEHREgash (Formula (16)), SEHREelech (Formula (17)) are given in the following tables: Table 5 — Part load conditions of air-to-air units and air-cooled multisplit systems in heating mode for the reference heating season “A” = average
A Outdoor air dry bulb (wet bulb) temperatures °C Indoor air dry bulb temperature °C
Part load ratio Part load ratio % A –16)/(Tdesignh-16) 88
« 20 B (+2–16)/(Tdesignh-16) 54 2(1) 20 C (+7–16)/(Tdesignh-16) 35 7(6) 20 D (+12–16)/(Tdesignh-16) 15 12(11) 20 E (TOL-16)/(Tdesignh-16) TOL 20 F (Tbivalent- Tbivalent 20 SIST EN 16905-5:2018
W Outdoor air dry bulb (wet bulb) temperatures °C Indoor air dry bulb temperature °C
Part load ratio Part load ratio %
A (not applicable)
B (+2–16)/(Tdesignh-16) 100 2(1) 20 C (+7–16)/(Tdesignh-16) 64 7(6) 20 D (+12–16)/(Tdesignh-16) 29 12(11) 20 E (TOL-16)/(Tdesignh-16) TOL 20 F (Tbivalent- Tbivalent 20 Table 7 — Part load conditions of air-to-air units and air-cooled multisplit systems in heating mode for the reference heating season “C” = colder
C Outdoor air dry bulb (wet bulb) temperatures °C Indoor air dry bulb temperature °C
Part load ratio Part load ratio %
A –16)/(Tdesignh-16) 61
« 20 B (+2–16)/(Tdesignh-16) 37 2(1) 20 C (+7–16)/(Tdesignh-16) 24 7(6) 20 D (+12–16)/(Tdesignh-16) 11 12(11) 20 E (TOL-16)/(Tdesignh-16) TOL 20 F (Tbivalent-16)/(Tdesignh-16) Tbivalent 20 Ga –16)/(Tdesignh-16) 82
«15 20 a Condition G is performed in case TOL is below
« t r °C. SIST EN 16905-5:2018
A Outdoor heat exchanger Indoor heat exchanger
Part load ratio Part load ratio %
Ground water Brine Indoor air
Inlet/outlet temperatures °C Inlet/outlet temperatures °C Inlet dry bulb temperature °C A –16)/(Tdesignh-16) 88 10/a 0/a 20 B (+2–16)/(Tdesignh-16) 54 10/a 0/a 20 C (+7–16)/(Tdesignh-16) 35 10/a 0/a 20 D (+12–16)/(Tdesignh-16) 15 10/a 0/a 20 F (Tbivalent-16)/(Tdesignh-16) 10/a 0/a 20 a The water flow rate as determined at the standard rating conditions.
Table 9 — Part load conditions of water-to-air and brine-to-air units in heating mode for the reference heating season “W” = warmer
W Outdoor heat exchanger Indoor heat exchanger
Part load ratio Part load ratio % Ground water Brine Indoor air Inlet/outlet temperatures °C Inlet/outlet temperatures ° C Indoor temperatures dry bulb °C A Not applicable
B (+2–16)/(Tdesignh-16) 100 10/a 0/a 20 C (+7–16)/(Tdesignh-16) 64 10/a 0/a 20 D (+12–16)/(Tdesignh-16) 29 10/a 0/a 20 F (Tbivalent-16)/(Tdesignh-16) 10/a 0/a 20 a The water flow rate as determined at the standard rating conditions of fixed capacity heat pumps. SIST EN 16905-5:2018
C Outdoor heat exchanger Indoor heat exchanger
Ground water Brine Indoor air
Part load ratio Part load ratio % Inlet/outlet temperatures °C Inlet/outlet temperatures ° C Indoor temperatures dry bulb °C A –16)/(Tdesignh-16) 61 10/a 0/a 20 B (+2–16)/(Tdesignh-16) 37 10/a 0/a 20 C (+7–16)/(Tdesignh-16) 24 10/a 0/a 20 D (+12–16)/(Tdesignh-16) 11 10/a 0/a 20 F (Tbivalent-16)/(Tdesignh-16) 10/a 0/a 20 a The water flow rate as determined at the standard rating conditions of fixed capacity heat pumps. 5.4 Air-to-water units 5.4.1 General For each application, units either allowing or not allowing a variation of the outlet water temperature with the outdoor temperature are considered. The variable outlet temperature shall only be applied when the control provides a regulation of outlet water temperature that considers the outdoor temperature. The part load conditions for determining the reference SGUEh (Formula (11)), SAEFh (Formula (13)), SEHREgash (Formula (16)), SEHREelech (Formula (17)) are given in the following tables. SIST EN 16905-5:2018
A Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet temperatures
Inlet dry bulb
(wet bulb) temperature °C Fixed outlet °C Variable outlet °C A –16)/(Tdesignh-16) 88
« a /35 a /34 B (+2–16)/(Tdesignh-16) 54 2(1) a /35 a /30 C (+7–16)/(Tdesignh-16) 35 7(6) a /35 3/27 D (+12–16)/(Tdesignh-16) 15 12(11) a /35 a /24 E (TOL-16)/(Tdesignh-16) TOL a /35 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a /35 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature a With the water flow rate as determined at the standard rating conditions at 30/35 conditions for units with a fixed water flow rate, and with a fixed delta T of 5 K for units with a variable flow rate. b For exhaust air heat pumps part load tests A - F are performed with an outdoor heat exchanger condition according to EN 16905–4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to EN 16905-4. SIST EN 16905-5:2018
W Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet Inlet dry (wet) bulb °C Fixed outlet °C Variable outlet °C A Not applicable
«
B (+2–16)/(Tdesignh-16) 100 2(1) a /35 a
/35 C (+7–16)/(Tdesignh-16) 64 7(6) a /35 a
/31 D (+12–16)/(Tdesignh-16) 29 12(11) a /35 a
/26 F (Tbivalent-16)/(Tdesignh-16) c Tbivalent a /35 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 30/35 conditions for units with a fixed water flow rate, and with a fixed delta T of 5 K for units with a variable flow rate.
b For exhaust air heat pumps part load tests A - F are performed with an outdoor heat exchanger condition according to EN 16905–4. c Not applicable if Tbivalent is equal or lower than temperature of B condition. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to EN 16905-4. SIST EN 16905-5:2018
C Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet
Inlet dry (wet) bulb °C Fixed outlet °C Variable outlet °C A –16)/(Tdesignh-16) 61
« a/35 a/30 B (+2–16)/(Tdesignh-16) 37 2(1) a/35 a/27 C (+7–16)/(Tdesignh-16) 24 7(6) a/35 a/25 D (+12–16)/(Tdesignh-16) 11 12(11) a/35 a/24 E (TOL-16)/(Tdesignh-16) TOL a/35 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a/35 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature G t16)/(Tdesignh-16) 82
« a/35 a/32 a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 30/35 conditions for units with a fixed water flow rate, and with a fixed delta T of 5 K for units with a variable flow rate. b For exhaust air heat pumps part load tests A - F are performed with an outdoor heat exchanger condition according to EN 16905t4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to EN 16905-4. SIST EN 16905-5:2018
A Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet temperatures
Inlet dry bulb (wet bulb) temperature °C Fixed outlet °C Variable outlet °C A –16)/(Tdesignh-16) 88
« a/45 a/43 B (+2–16)/(Tdesignh-16) 54 2(1) a/45 a/37 C (+7–16)/(Tdesignh-16) 35 7(6) a/45 a/33 D (+12–16)/(Tdesignh-16) 15 12(11) a/45 a/28 E (TOL-16)/(Tdesignh-16) TOL a/45 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a
/45 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 40/45 conditions for units with a fixed water flow rate, and with a fixed delta T of 5 K for units with a variable flow rate.
b For exhaust air heat pumps part load tests A - F are performed with an outdoor heat exchanger condition according to EN 16905–4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to EN 16905-4. SIST EN 16905-5:2018
W Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet
Inlet dry (wet) bulb °C Fixed outlet °C Variable outlet °C A Not applicable
«
B (+2–16)/(Tdesignh-16) 100 2(1) a/45 a/45 C (+7–16)/(Tdesignh-16) 64 7(6) a/45 a/39 D (+12–16)/(Tdesignh-16) 29 12(11) a/45 a/31 E (TOL-16)/(Tdesignh-16) TOL a/45 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a/45 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 40/45 conditions for units with a fixed water flow rate, and with a fixed delta T of 5 K for units with a variable flow rate. b For exhaust air heat pumps part load tests A - F are performed with an outdoor heat exchanger condition according to EN 16905–4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to
EN 16905-4. SIST EN 16905-5:2018
C Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet
Inlet dry (wet) bulb °C Fixed outlet °C Variable outlet °C A –16)/(Tdesignh-16) 61
« a/45 a/38 B (+2–16)/(Tdesignh-16) 37 2(1) a/45 a/33 C (+7–16)/(Tdesignh-16) 24 7(6) a/45 a/30 D (+12–16)/(Tdesignh-16) 11 12(11) a/45 a/26 E (TOL-16)/(Tdesignh-16) TOL a/45 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a/45 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature G t16)/(Tdesignh-16) 82
«15 a/45 a/41 a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 40/45 conditions for units with a fixed water flow rate, and with a fixed delta T of 5 K for units with a variable flow rate.
b For exhaust air heat pumps part load tests A t F are performed with an outdoor heat exchanger condition according to EN 16905t4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to
EN 16905-4. SIST EN 16905-5:2018
A Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet temperatures
Inlet dry bulb (wet bulb) temperature °C Fixed outlet °C Variable outlet °C A –16)/(Tdesignh-16) 88
« a/55 a/52 B (+2–16)/(Tdesignh-16) 54 2(1) a /55 a/42 C (+7–16)/(Tdesignh-16) 35 7(6) a/55 a/36 D (+12–16)/(Tdesignh-16) 15 12(11) a/55 a/30 E (TOL-16)/(Tdesignh-16) TOL a/55 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a/55 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 47/55 conditions for units with a fixed water flow rate, and with a fixed delta T of 8 K for units with a variable flow rate. b For exhaust air heat pumps part load tests A – F are performed with an outdoor heat exchanger condition according to EN 16905–4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to
EN 16905-4. SIST EN 16905-5:2018
W Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet
Inlet dry (wet) bulb °C Fixed outlet °C Variable outlet °C A Not applicable
«
B (+2–16)/(Tdesignh-16) 100 2(1) a/55 a/55 C (+7–16)/(Tdesignh-16) 64 7(6) a/55 a/46 D (+12–16)/(Tdesignh-16) 29 12(11) a/55 a/34 E (TOL-16)/(Tdesignh-16) TOL a/55 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a/55 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 47/55 conditions for units with a fixed water flow rate, and with a fixed delta T of 8 K for units with a variable flow rate. b For exhaust air heat pumps part load tests A – F are performed with an outdoor heat exchanger condition according to EN 16905–4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to
EN 16905-4. SIST EN 16905-5:2018
C Outdoor heat exchanger b Indoor heat exchanger
Part load ratio Part load ratio % Outdoor air Inlet/outlet
Inlet dry (wet) bulb °C Fixed outlet °C Variable outlet °C A –16)/(Tdesignh-16) 61
« a/55 a/44 B (+2–16)/(Tdesignh-16) 37 2(1) a/55 a/37 C (+7–16)/(Tdesignh-16) 24 7(6) a/55 a/32 D (+12–16)/(Tdesignh-16) 11 12(11) a/55 a/28 E (TOL-16)/(Tdesignh-16) TOL a/55 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a F (Tbivalent-16)/(Tdesignh-16) Tbivalent a/55 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature G t16)/(Tdesignh-16) 82
«15 a/55 a/49 a With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 47/55 conditions for units with a fixed water flow rate, and with a fixed delta T of 8 K for units with a variable flow rate. b For exhaust air heat pumps part load tests A - F are performed with an outdoor heat exchanger condition according to EN 16905t4. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat exchanger should be fixed according to
EN 16905-4. SIST EN 16905-5:2018
A Outdoor heat exchanger Indoor heat exchanger
Ground water Brine Inlet/outlet temperatures
Part load ratio Part load ratio % Inlet/outlet temperatures °C Inlet/outlet temperatures °C Fixed outlet °C Variable outlet °C A –16)/(Tdesignh-16) 88 10/a 0/a b /35 b/34 B (+2–16)/(Tdesignh-16) 54 10/a 0/a b/35 b/30 C (+7–16)/(Tdesignh-16) 35 10/a 0/a b/35 b/27 D (+12–16)/(Tdesignh-16) 15 10/a 0/a b/35 b/24 E (Tdesignh-16)/(Tdesignh-16) 100 10/a 0/a b/35 b/35 F (Tbivalent-16)/(Tdesignh-16)
10/a 0/a b/35 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature a With the water/brine flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 30/35 conditions. b With the water flow rate as determined at the standard rating conditions of fixed capacity heat pumps at 30/35 conditions for units with a fixed water flow rate, and with a fixed delta T of 5 K for units with a variable flow rate. For units that have to cycle on/off to reach the required part load ratio or part load condition below Tbivalent, the inlet temperature of the indoor heat ex
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