The laboratory can pass the unit performance and power evaluation relationship

Air conditioners, liquid chillers and heat pumps with electric compressors - Heating mode Part 3: Tests and requirements for units for the production of domestic hot water. The standard gives a test method for the performance of a heat pump water heater, which specifically includes the following five main stages. --- Heating during heating period; --- Determination of water heater performance coefficient; --- Determination of reference hot water temperature; --- Determination of standby input power; --- Determination of the maximum available hot water in a discharge water test process continues Long, but can more comprehensively evaluate the power consumption caused by the temperature drop of the tank during this process, and also can evaluate the maximum amount of hot water that can be obtained after the tank is heated.

The amount of heating of the hot water is obtained by releasing half of the hot water, and then the cold water to be replenished is heated to a set temperature to stop, and the power consumption during this period is calculated to obtain the coefficient of performance of the system. Australia's test method for energy efficiency of heat pump water heaters is similar to the method specified in GB/T23137-2008. It is based on the water temperature inside the tank, and the average temperature is calculated. Then the total heating capacity and power consumption are calculated to calculate the specific conditions. efficiency. The difference is that the Australian heat pump water heater energy efficiency assessment standard in order to calculate the performance of a specific working condition, first obtain a large number of data samples, and then statistically, the unit can be assessed seasonally. In this way, the laboratory can obtain performance under a given ambient air temperature, humidity, and inlet temperature conditions through the unit's performance and power evaluation relationships.

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