What is EN 14825?
What is EN 14825?
EN 14825 sets out the temperatures, part-load conditions, and calculation methods for determining the Seasonal Coefficient of Performance (SCOP) and Seasonal Energy Efficiency Ratio (SEER). It applies to the operation of air-conditioning units, process chillers, and particular types of hybrid heat pumps. The values used to define the SCOP can be calculated or measured. If measured values are applied, the standard covers the applicable test methods.
The importance of SCOP and SEER as an indication of heat pump efficiency
The operation of a heat pump will be affected by the seasonal temperature changes of the energy source. Whilst the Coefficient of Performance (COP) determines the instantaneous efficiency of a heat pump based on test conditions, SCOP indicates the aggregated annual performance using climate data across Europe. The result is a standard ratio of total heat energy generated (the output) for each unit of energy or electricity consumed (input). The SEER similarly indicates the cooling efficiency of the heat pump in the annual timeframe, where the heat pump provides comfort cooling.
SCOP and SEER and specification of heat pumps
The Seasonal Energy Efficiency Ratio (SEER) and SCOP calculations consider a heat pump operation under standard conditions. It does not account for heat losses at the site of operation or its impact on space heating. Weather factors are assumed to be constant, reflecting the average European climate data.
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