TY  - CONF
A1  - Palkowski, Carsten
A1  - Schlegel, Moritz-Caspar
A1  - Akkerman, Floris
A1  - Simo, Anne
T1  - Telling the truth - Validity of energy efficiency values of heat pumps determined under laboratory conditions
T2  - Proceedings of the 9th international conference on Energy Efficiency in Domestic Appliances and Lighting (EEDAL '17)
N2  - In this study, the test method EN 14825 for testing heat pumps is validated by verifying the sensitivity of the seasonal space heating energy efficiency ηs,(declared on the energy Efficiency label) in relation to the nominal heating capacity Pdesign. Therefore, the two major parts of the test method, the measurement part and the calculation part, were investigated. The calculation part was subjected to a sensitivity analysis in order to identify the properties of a heat pump which have a strong influence on ηs. The analysis revealed that the energy consumption in Special operating states, the duration in active-mode and seasonal performance values in active-mode (SCOPon) significantly affect the sensitivity of ηs. Especially short operating times, in which the heat pump is in active-mode, lead to large changes in ηs with varying Pdesign. In addition, the range of power of Pdesign turned out to have an increasing impact on ηs with decreasing Pdesign. For Pdesign values ≤10 kW, the sensitivity of ηs increases tremendously. Especially the determination of the ηs for devices with short operating times in active-mode (1400 h) and low values for Pdesign (≤10 kW)cannot be reproduced anymore.
T2  - 9th international conference on energy efficiency in domestic appliances and lighting (EEDAL '17)
CY  - Irvine, CA, USA
DA  - 13.09.2017
KW  - Circumvention
KW  - Energy efficiency
KW  - Energy labelling
KW  - Heat pumps
KW  - Test method standard optimization
PY  - 2017
SN  - 978-92-79-77174-3
DO  - https://doi.org/10.2760/113534
SN  - 1831-9424
VL  - 2017
IS  - Part III
SP  - 1104
EP  - 1112
AN  - OPUS4-43833
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -