An absorption refrigeration system provides 24 kW of cooling while receiving 18 kW of solar heat input. The COP of this system is 1.0 1.33 0.75 0.5
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- Question 10 Consider a residential heat pump use to maintain the inside air temperature of the house at 23C. Assuming Carnot assumptions, estimate the minimum power requirements (kW) if the outside temperature is OC and the house requires 1 kW of heating per temperature difference between the indoors and the outdoors temperatures (C). 2.392 12.87 1.163 1.787A manufacturer conducted an experiment for an evaporator capacity 500 kW cooling and designed for high COP of 2 when using lithium bromide plus water in an absorption refrigeration system. The evaporator operates 20 C, condenser 40 C & absorber 45 C supplying 1.4 kg/s of water plus lithium bromide solution to the generator. For a condenser size of 650 kW, determine:Ethalphy of the refrigerant leaving the Evaporator in kJ/kgAnswer in one decimal place(s)A manufacturer conducted an experiment for an evaporator capacity 500 kW cooling and designed for high COP of 2 when using lithium bromide plus water in an absorption refrigeration system. The evaporator operates 20 C, condenser 40 C & absorber 45 C supplying 1.4 kg/s of water plus lithium bromide solution to the generator. For a condenser size of 650 kW, determine: Ethalphy of the refrigerant leaving the Evaporator in kJ/kg Answer in one decimal place(s)
- A split air conditioner is used to heat an office in winter and cool it in summer.For this purpose, a split air conditioner with a cooling power of 1200 Btuh (3.5 kw) is used for the office. The power drawn by the split air conditioner is 1.2 kw accordingly. a) COP value b) If the outdoor temperature of the air conditioner is kept 22 C in summer, calculate the limit values for heating and cooling COP if the outdoor temperature in summer is 42C and the outside temperature in winter is -6CA heat engine running between a pit at 15 degree and an energy storage that is 50 times warmer than the pitworks. 2/3 of the generated power is used to run the Carnot heat pump, which heats an home. Heatpump draws heat from the air at 4 degree and keeps the home at 15 degree. So the heat loss of homeis 61000 kJ / h;a. Describe the system by drawing it schematically.b. Calculate the minimum heat that should be transferred to the heat engine.The coefficient of performance (COP) for a vapor compression cycle chiller is 8.7. If the chiller can produce 58 tons of cooling. If the chiller operates for a total of 3568 hours annually, and the cost of electricity is $0.15 per kWh, how much does it cost to operate the chiller? Fill in the operating cost of the chiller in one year in $.
- 1. A geothermal heat pump with a COP of 1.3 provides 48000 BTU/hr of heat to a building. Assuming an electrical power rate of $0.20/kWh. answer the following questions for this system: a. What would be the monthly cost to provide heat at a rate of 48000 BTU/hr if the heat was delivered by a simple electrical resistance heater? b. How much heat is drawn from the ground by the heat pump in that month, in kWh? c. What is the savings per month enjoyed by operating this heat pump for a month vs. a simple electrical resistance heater?A manufacturer conducted an experiment for an evaporator capacity 500 kW cooling and designed for high COP of 2 when using lithium bromide plus water in an absorption refrigeration system. The evaporator operates 20 C, condenser 40 C & absorber 45 C supplying 1.4 kg/s of water plus lithium bromide solution to the generator. For a condenser size of 650 kW, determine:Ethalphy of the refrigerant entering the Evaporator in kJ/kg Answer in two decimal placesA refrigeration unit with COP = 3.8 is being used to remove heat from a particular machine by 0.42 kg/s of water (C, = 4.18 kJ/kg.K) at 20 °C that is chilled from 40 °C as shown in the Figure. What is the power input (in kW) to the refrigeration unit? Select one: O 11.15 1 2 10.97 9.24 REF TH O 13.26 QH O 14.63 O 12.32
- A heat pump is used to heat a house. When the outside air temperature is 266K and the inside is maintained at 293K, the heat loss from the house is 195 kW. a. What is the minimum electric power (kW) required to operate the heat pump? b. What is the rate of heat transfer to the heat pump? C. What is the COP for an ideal heat pump operating between these temperatures?01. A refrigerant 22 system having a refrigerating capacity of 55 kW operates with an evaporating temperature of 5°C and rejects heat to water cooled condenser. The compressor is hermetically sealed. The condenser has a U value of 450 W/m².K and a heat-transfer area of 18 m? and receives a flow rate of cooling water of 3.2 kg/s at a temperature of 30°C. What is the condensing temperature?During an average year of operation, the heat pump described in Part (a) above provides 15kW of heat to the house while using a total of 4.29kW of electricity. Using this information, calculate the Coefficient of Performance of the heat pump? A deep retrofit is beihg carried out on a domestic dwelling house to achieve an “A" Building Energ Rating. As part of this retrofit, an air-source heat pump is being installed. Using a detailed diagram describe the operation of an air source heat pump, showing the various components, identifying the working fluid, and how the heat is transferred.