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BS ISO 21978:2023 – TC

BS ISO 21978:2023 – TC

$258.95

Tracked Changes. 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 131
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PDF Catalog

PDF Pages PDF Title
75 National foreword
80 Foreword
81 Introduction
82 1 Scope
2 Normative references
3 Terms and definitions
89 4 Symbols
90 5 Installation requirements
5.1 Test apparatus and uncertainties of measurement
91 5.2 Test room for the airside
5.3 Installation and connection of the heat pump
92 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
93 6.4 Setting of units with integral pumps
6.5 Part load test conditions
95 7 Space heating test
7.1 Heating capacity test
96 7.2 Heating capacity correction
7.2.1 General
7.2.2 Capacity correction due to indoor liquid pump
97 7.2.3 Effective power input
98 7.3 Test procedure
7.3.1 General
99 7.3.2 Permissible deviations
100 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
101 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
102 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
103 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
105 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
106 9 Test results and test report
9.1 Data
107 9.2 Test report
10 Marking provisions
10.1 General
108 10.2 Nameplate requirements
10.3 Nameplate information
109 Annex A (normative) Heating capacity test procedures given in 7.3
115 Annex B (normative) Determination of the liquid pump efficiency
119 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
121 Annex D (informative) SCOP,on and SCOP,net calculation for fixed capacity for 35 °C temperature application — Example
125 Annex E (informative) SCOP,on and SCOP,net calculation for variable capacity unit for 35 °C temperature application — Example
129 Bibliography

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BS ISO 21978:2023 - TC
$258.95