A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW.
Problem 2)
A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW.
(a) Determine the net power required to operate the heat pump, in kW.
(b) Evaluating electricity at $0.08 per determine the cost of electricity in a month when the heat pump operates for 200 hours.
Problem 3)
A power cycle receives energy by heat transfer from the combustion of fuel at a rate of 300 MW. The thermal efficiency of the cycle is 33.3%.
(a) Determine the net rate power is developed, in MW
(b) For 8000 hours of operation annually, determine the net work output, in per year.
(c) Evaluating the net work output at $0.08 per determine the value of the net work, in $/year.
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A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW.
A concentrating solar collector system, as below, provides energy by heat transfer to a power cycle...
A concentrating solar collector system, as below, provides
energy by heat transfer to a power cycle at a rate of 2 MW. The
cycle thermal efficiency is 36%. Determine the power developed by
the cycle, in MW. What is the work output, in MW*h, for 4380 hours
of steady-state operation? If the work is valued at $0.08/kW-h,
what is the total dollar value of the work output?
A heat pump maintains a dwelling at 68 F. When operating steadily, the power input to...
A heat pump maintains a dwelling at 68 F. When operating steadily, the power input to the heat pump is 5 hp, and the heat pump receives energy by heat transfer from 55 F well water at a rate of 500 Btu/min. determine the coefficient of performace. Evaluating electricity at $ 0.10 per kW.h determine the cost in a a month when the heat pump operates for 300 hours.
Thermodynamics 2.56 A gas within a piston-cylinder assembly undergoes a thermo- dynamic cycle consisting of three...
Thermodynamics
2.56 A gas within a piston-cylinder assembly undergoes a thermo- dynamic cycle consisting of three processes: Process 1-2: Constant volume V1 m, pi bar, to p2 3 bar, U2- U400 kJ Process 2-3: Constant pressure expansion to V 2 m3 Process 3-1: Adiabatic compression, with W1120 kJ There are no significant changes in kinetic or potential energy. De- termine the net work for the cycle, in kJ, and the heat transfers for Processes 1-2 and 2-3, in kJ. Is...
A concentrating solar collector system, as shown in the figure below, provides energy by heat transfer...
A concentrating solar collector system, as shown in the figure below, provides energy by heat transfer to a power cycle at a rate of 2 MW. The cycle thermal efficiency is 40.00%. – Receiver Power cycle Atmosphere Molten salt or oil TA Wade LPump Determine the power developed by the cycle, in MW. What is the work output, in MW. h, for 4380 hours of steady-state operation? If the work is valued at $0.08/kw.h, what is the total dollar value...
Problem 2.069 SI A window-mounted room air conditioner removes energy by heat transfer from a room...
Problem 2.069 SI A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. For steady-state operation, the air conditioner cycle requires a power input of 0.7 kW and has a coefficient of performance of 5.5. Determine the rate that energy is removed from the room air, in kw. If electricity is valued at $0.1/kW·h, determine the cost of operation for 24 hours of operation. ▼ Part A...
US PRINTER VERSİON "ACKIC I Problem 5.044 SI A heat pump cycle is used to maintain...
US PRINTER VERSİON "ACKIC I Problem 5.044 SI A heat pump cycle is used to maintain the intenior of a building at 20°C. At steady state, the heat pump receives energy by 9eC and discharges energy by heat transfer to the building at a rate of 120,000 k/h. Over a period of 14 days, an electric meter records that 2000 kw-h of electricity is provided to the heat pump. Determine: (a) the amount of eneroy that the heat pump receives...
A pump is pumping water at a flow rate of 1200 litres per minute. In the...
A pump is pumping water at a flow rate of 1200 litres per minute. In the pump the mechanical energy of the water increases by 250 J/kg. The density of water is 1000 kg/m3. a) Determine the pressure difference between the pump outlet and the pump inlet. Assumptions: there are no frictional losses in the pump, and differences in velocity and elevation between inlet and outlet of the pump can be neglected. b) Show that the mechanical power added to...
1. 1. The primary energy savings in tep (1 MWh -0.086 tep) and diesel, which involves the direct use of heat from a geothermal resource to cover a heat demand of 100 kW for 3,500 h / year, assum...
1. 1. The primary energy savings in tep (1 MWh -0.086 tep) and diesel, which involves the direct use of heat from a geothermal resource to cover a heat demand of 100 kW for 3,500 h / year, assuming that this demand will be covered with diesel boiler of average yield 0.8 (for diesel 1.12 tep/ton gas oil), they are: a) 30.1 tep/year, 26.9 ton/year b) 37.6 tep/year, 33.6 ton/year c)41.2 tep/year, 36.8 ton /year 1. 2. A hydraulic pump...
6. An office building requires a heat transfer rate of 20 kW to maintain the inside temperature a...
6. An office building requires a heat transfer rate of 20 kW to maintain the inside temperature at 21°C when the outside temperature is 0°C. A vapor-compression heat pump with Refrigerant 134a as the working fluid is to be used to provide the necessary heating. The compressor operates adiabatically with an isentropic efficiency of 82%. Specify appropriate evaporator and condenser pressures of a cycle for this purpose assuming Δ1cond-Al evap-10°C, as shown below. The states are numbered as shown below....
A power plant operates on a superheat vapor power cycle with water is the working fluid....
A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%), (b) determine the heat input to the...
A concentrating solar collector system, as below, provides
energy by heat transfer to a power cycle at a rate of 2 MW. The
cycle thermal efficiency is 36%. Determine the power developed by
the cycle, in MW. What is the work output, in MW*h, for 4380 hours
of steady-state operation? If the work is valued at $0.08/kW-h,
what is the total dollar value of the work output?
Thermodynamics
2.56 A gas within a piston-cylinder assembly undergoes a thermo- dynamic cycle consisting of three processes: Process 1-2: Constant volume V1 m, pi bar, to p2 3 bar, U2- U400 kJ Process 2-3: Constant pressure expansion to V 2 m3 Process 3-1: Adiabatic compression, with W1120 kJ There are no significant changes in kinetic or potential energy. De- termine the net work for the cycle, in kJ, and the heat transfers for Processes 1-2 and 2-3, in kJ. Is...
A concentrating solar collector system, as shown in the figure below, provides energy by heat transfer to a power cycle at a rate of 2 MW. The cycle thermal efficiency is 40.00%. – Receiver Power cycle Atmosphere Molten salt or oil TA Wade LPump Determine the power developed by the cycle, in MW. What is the work output, in MW. h, for 4380 hours of steady-state operation? If the work is valued at $0.08/kw.h, what is the total dollar value...
Problem 2.069 SI A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. For steady-state operation, the air conditioner cycle requires a power input of 0.7 kW and has a coefficient of performance of 5.5. Determine the rate that energy is removed from the room air, in kw. If electricity is valued at $0.1/kW·h, determine the cost of operation for 24 hours of operation. ▼ Part A...
US PRINTER VERSİON "ACKIC I Problem 5.044 SI A heat pump cycle is used to maintain the intenior of a building at 20°C. At steady state, the heat pump receives energy by 9eC and discharges energy by heat transfer to the building at a rate of 120,000 k/h. Over a period of 14 days, an electric meter records that 2000 kw-h of electricity is provided to the heat pump. Determine: (a) the amount of eneroy that the heat pump receives...
1. 1. The primary energy savings in tep (1 MWh -0.086 tep) and diesel, which involves the direct use of heat from a geothermal resource to cover a heat demand of 100 kW for 3,500 h / year, assuming that this demand will be covered with diesel boiler of average yield 0.8 (for diesel 1.12 tep/ton gas oil), they are: a) 30.1 tep/year, 26.9 ton/year b) 37.6 tep/year, 33.6 ton/year c)41.2 tep/year, 36.8 ton /year 1. 2. A hydraulic pump...
6. An office building requires a heat transfer rate of 20 kW to maintain the inside temperature at 21°C when the outside temperature is 0°C. A vapor-compression heat pump with Refrigerant 134a as the working fluid is to be used to provide the necessary heating. The compressor operates adiabatically with an isentropic efficiency of 82%. Specify appropriate evaporator and condenser pressures of a cycle for this purpose assuming Δ1cond-Al evap-10°C, as shown below. The states are numbered as shown below....
A power plant operates on a superheat vapor power cycle with water is the working fluid. Superheated steam enters the turbine at 80 bar, 480° C, and expands to 0.08 bar to the condenser and becomes saturated liquid enters the feed water pump. The net cycle work output is 100 MW. Assume isentropic process exists at the turbine and the pump. (a) Sketch the schematic and T-S diagram of the power cycle (5%), (b) determine the heat input to the...
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