Methodology for Measuring Temperature Conditions of Heat Pump Outdoor Unit
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Abstract
Heat pumps are becoming increasingly widespread as a heat source for ambient air. The energy density of air as a heat source is extremely low, so a large amount of it has to be passed through the heat exchanger of the outdoor unit. For this reason, care must be taken when installing the outdoor unit to ensure that nearby buildings and structures do not interfere with the air flow. If the installation conditions are not suitable, a hydraulic short circuit may occur between the intake and exhaust sides, resulting in a drop in the temperature of the intake air. This phenomenon has a direct impact on the COP that can be achieved. Given that this phenomenon is not observable to the naked eye, a measurement procedure has been developed to detect and measure this phenomenon. Our aim is to develop a method that can be implemented with the simplest possible measurement procedure, with the fewest possible sensors, but which gives results of sufficient accuracy for practical applications. This will allow the environmental parameter analysis of previously installed outdoor units of heat pumps, with particular reference to temperature conditions.
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