Chemistry
The system will start by using the procedure for normal capillary cycle. It will be allowed to run for five to ten minutes in order to stabilize. The process will start with evaporation of the refrigerant, taking heat from the low temperature part of the system and giving it out to the high temperature part of the system. The refrigerant must meet the requirement of having a vapor pressure of above one atmosphere at the refrigeration temperature but, not high pressure at the heat rejection temperature. We will take the wattmeter readings for the calculation of the power in put in the compressor. Measurements of temperature of the condenser and evaporator will be recorded to calculate the COP. COP will be obtained by dividing heat absorbed at a lower temperature by power consumed by the compressor. The calculated value will be compared with the ideal COP of the Carnot cycle. Average velocity of the air passing over the condenser and the evaporator will be recorded to calculate the mass flow rate of the air. The fans will be operating at a medium speed. The mass flow rate of the air will be used to calculate the heat delivered or absorbed by the condenser or the evaporator. Numerous temperature readings recorded from the evaporator and the condenser will be used to calculate the rate of heat rejection. The wattmeter reading will be used to calculate the power input to the compressor by subtracting the readings of the fans. It is expected that the operation will be poorer whenever the fan spins at a lower speed. The condensed liquid is returned to the evaporator by reducing the pressure in the tubing. Long coiled capillary tubing completing the process creates this pressure drop.
