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BS ISO 21978:2023

BS ISO 21978:2023

$198.66

Air to water heat pumps. Testing and rating at part load conditions and calculation of seasonal coefficient of performance for space heating

Published By Publication Date Number of Pages
BSI 2023 58
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
16 4 Symbols
17 5 Installation requirements
5.1 Test apparatus and uncertainties of measurement
18 5.2 Test room for the airside
5.3 Installation and connection of the heat pump
19 5.4 Installation of heat pumps consisting of several parts
5.5 Environment conditions for indoor unit installation and electrical power supply requirements
6 Setting and part load test conditions
6.1 General
6.2 Setting for capacity ratio
6.3 Setting the external static pressure difference for ducted units
20 6.4 Setting of units with integral pumps
6.5 Part load test conditions
22 7 Space heating test
7.1 Heating capacity test
23 7.2 Heating capacity correction
7.2.1 General
7.2.2 Capacity correction due to indoor liquid pump
24 7.2.3 Effective power input
25 7.3 Test procedure
7.3.1 General
26 7.3.2 Permissible deviations
27 7.3.3 Preconditioning period
7.3.4 Equilibrium period
7.3.5 Data collection period
7.4 Heating capacity calculation
7.4.1 Steady state capacity test
7.4.2 Transient capacity test
7.5 Effective power input calculation
7.5.1 Steady state test
7.5.2 Transient capacity test
28 7.6 Determination of degradation coefficient Cd
7.7 Test methods for electric power input during thermostat-off mode, standby mode, crankcase heater mode and off mode
7.7.1 Uncertainties of measurement
29 7.7.2 Measurement of electric power input during thermostat-off mode
7.7.3 Measurement of electric power input during standby mode
7.7.4 Measurement of electric power input during crankcase heater mode
7.7.5 Measurement of electric power input during off mode
30 8 Calculation methods for seasonal coefficient of performance (SCOP)
8.1 General formula for calculation of SCOP
8.2 Calculation of the reference annual heating demand, QH
8.3 Calculation of the annual energy consumption, QHE
8.4 Calculation of SCOP,on and SCOP,net
32 8.5 Calculation procedure for determination of CPb values at part load conditions A to G
8.5.1 General
8.5.2 Calculation procedure for fixed capacity units
8.5.3 Calculation procedure for staged and variable capacity units
33 9 Test results and test report
9.1 Data
34 9.2 Test report
10 Marking provisions
10.1 General
35 10.2 Nameplate requirements
10.3 Nameplate information
36 Annex A (normative) Heating capacity test procedures given in 7.3
42 Annex B (normative) Determination of the liquid pump efficiency
46 Annex C (informative) Examples of set of bin hours and hours for active mode, thermostat-off mode, standby mode, off mode and crankcase heater mode
48 Annex D (informative) SCOP,on and SCOP,net calculation for fixed capacity for 35 Ā°C temperature application ā€” Example
52 Annex E (informative) SCOP,on and SCOP,net calculation for variable capacity unit for 35 Ā°C temperature application ā€” Example
56 Bibliography

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BS ISO 21978:2023
$198.66