Heat Pump Lab
MECHANICAL ENGINEERING 449 SENIOR LAB
Test of a Heat Pump
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Executive Summary:
The purpose of this experiment was to determine the performance values of a Hylton Air and Water Heat Pump System. The system uses refrigerant 134a and water as the working fluids. The power input of the system was measured. The rate of heat output and the coefficient of performance are to be determined. A sketch of the vapor-compression cycle on a pressure-enthalpy diagram is also to be presented.
In order to perform this analysis the temperatures at the inlet and outlet of the condenser and evaporator were measured for both the refrigerant and the water. The flow rate of the refrigerant through the system was measured and assumed to be constant throughout. The flow rate of the water was measured through the condenser and evaporator as well as the pressure of the refrigerant through the condenser and evaporator. The water was used to cool the compressor before entering the condenser and the inlet and outlet temperatures were measured.
In order to accomplish the objectives energy balances were performed on both the evaporator and condenser for the refrigerant and water. After performing an energy balance on the condenser, the energy lost by the refrigerant was found to be 1,571 Watts. The water through the condenser picked up an energy value of 1,669 Watts. The measured power input of the compressor was used to determine the coefficient of performance (COP) of heating and was found to be approximately 3. The water was assumed to have a constant specific heat value of 4.18 KJ/KG°C. Changes in kinetic and potential energies are also assumed to be negligible as the working fluid passed through the successive volumes. The state of the refrigerant was also assumed to stay constant as it leaves one control volume and enters the next. The zero
Test of a Heat Pump
Submitted
Submitted by:
Submitted to:
Executive Summary:
The purpose of this experiment was to determine the performance values of a Hylton Air and Water Heat Pump System. The system uses refrigerant 134a and water as the working fluids. The power input of the system was measured. The rate of heat output and the coefficient of performance are to be determined. A sketch of the vapor-compression cycle on a pressure-enthalpy diagram is also to be presented.
In order to perform this analysis the temperatures at the inlet and outlet of the condenser and evaporator were measured for both the refrigerant and the water. The flow rate of the refrigerant through the system was measured and assumed to be constant throughout. The flow rate of the water was measured through the condenser and evaporator as well as the pressure of the refrigerant through the condenser and evaporator. The water was used to cool the compressor before entering the condenser and the inlet and outlet temperatures were measured.
In order to accomplish the objectives energy balances were performed on both the evaporator and condenser for the refrigerant and water. After performing an energy balance on the condenser, the energy lost by the refrigerant was found to be 1,571 Watts. The water through the condenser picked up an energy value of 1,669 Watts. The measured power input of the compressor was used to determine the coefficient of performance (COP) of heating and was found to be approximately 3. The water was assumed to have a constant specific heat value of 4.18 KJ/KG°C. Changes in kinetic and potential energies are also assumed to be negligible as the working fluid passed through the successive volumes. The state of the refrigerant was also assumed to stay constant as it leaves one control volume and enters the next. The zero