Study the Behaviour of Chest Freezer Working with R134a and R600a Under Pull Down and Loading States
摘要
In the present work, the transient state which includes the pull-down and loading period is tested for the chest freezer. The experimental work has been conducted by using a freezer of 150 L volume capacity working with R-134a and R-600a by two different compressors. The freezer is equipped with measuring devices to reading the pressure, temperature, refrigerant mass flow rate, and power consumption. The tests were done at the standard ambient temperature of 32℃. The results show the time for pull down and loading period for R-600a is short than that for R-134a and the power is also lower for R-600a. The improvement can be done by using the refrigerant R-600a (which is environmentally friendly) improving the performance of the system by reducing the power consumption and the operation time required to reach a steady state.