EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
9th Edition
ISBN: 9781119321453
Author: Sonntag
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Heat is transferred to a heat engine from a fumace at a rate of 120KW. If the rate of waste heat rejection to a nearby river is 50000W. Find the net Power output and the thermal efficiency for this heat engine.
A reversed carnot cycle that operates between -2 degrees celsius and 50 degrees celsius needs 45 KW compressor power. Find the tons of refrigeration.
A belt-driven compressor is used in refrigeration system that will cool 10 liters per second of water from 130C to 10C. The belt efficiency is 98%, motor efficiency is 85% and the input of the compressor is 0.7kW per ton of refrigeration. Find the actual COP if the overall efficiency is 65%.
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- A Camot engine operates between 12000F and 1000F and rejects 40 Btu to the low temperature heat reservoir. Find the net work.arrow_forwardFind the COP of heat pump operating between 300 K and 600K temperature. If the same temperature ranges are used in heat engine, find the efficiency.arrow_forwardA heat engine of 30% efficiency drives a heat pump of COP 5. The heat is transferred both from engine and the heat pump to circulating water for heating the building in winter. Find the ratio of heat transfer to the circulating water from heat pump to the heat transfer to the circulating water from the heatarrow_forward
- Attempt only if you are 100% Sure ,It seems 6.5 is the right answer. Show work within 20Minutes for thumb uparrow_forwardCogeneration is often used where a steam supply is needed for industrial process energy. Assume a supply of 5 kg/s steam at 0.5 MPa is needed. Rather than generating this from a pump and boiler, the setup in below. is used so the supply is extracted from the high-pressure turbine. Find the power the turbine now cogenerates in this process. 2 3 HP LParrow_forwardA carnot heat pump is operating to keep a room at 20C. The unit is taking in air from a -30C location. If it is pulling 5kW from the -30C location, what is the power input required to do this and how much heat is delivered to the 20C room?arrow_forward
- A refrigerator cycle uses refrigerant R-134a and operates between a low-side pressure of 1.5 Bar and high side of 10 Bar. The power input to the compressor 1.88 Kw. find the refrigerant mass flow rate, condensing heat load, and COP of this machinearrow_forwardIn a steam turbine steam at 2 MPa, 360°C is expanded to 8 kPa. It then enters a condenser, where it is condensed to saturated liquid water. The pump feeds back the water into the boiler. Assume ideal processes, find per kg of steam the net work and the cycle efficiency. 3(360°C) 2 MPa 8 kPaarrow_forwardAn engine has a thermal efficiency of 40%. It is used to drive a refrigerator having a COP of 5.0.Heat Removed from the cold body by the refrigerator is 1 kJ. What should be the heat input to theengine?arrow_forward
- A Carnot engine rejects 60 Btu of heat to a reservoir at 55 degrees F. If this engine produces 85 Btu as work what is the efficiency? 42% 58% O.58%arrow_forward/Heat is transferred from a tank of water in a refrigerator at(OC) degrees to a tank of boiling water at (100 C) degrees. With a reversible machine (heat pump). Calculate the Heat drawn from the refrigerator. if it was The heat transferred to the tank of boiling water is 2254kJ.arrow_forwardQ.7 The COP of the heat pump is found to be 5.62, and the heat pump operates with the source at 25°C, while the heat absorbed is 2.12 kW. What is the amount of heat rejected ?arrow_forward
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The Refrigeration Cycle Explained - The Four Major Components; Author: HVAC Know It All;https://www.youtube.com/watch?v=zfciSvOZDUY;License: Standard YouTube License, CC-BY