- 5.1CGP: Two heat engines operate between the same two energy reservoirs, an...
- 5.2CGP: Compare two domestic heat pumps (A and B) running with the same wor...
- 5.3CGP: Suppose we forget the model for heat transfer, Q = CA ?T; canwe dra...
- 5.4CGP: A combination of two heat engines is shown in Fig. P5.4. Find the o...
- 5.5CGP: Compare two heat engines receiving the same Q, one at 1200 K and th...
- 5.6CGP: A car engine takes atmospheric air in at 20°C, no fuel, and exhaust...
- 5.7CGP: A combination of two refrigerator cycles is shown in Fig. P5.7. Fin...
- 5.8CGP: After you have driven a car on a trip and it is back home, the car’...
- 5.9CGP: Does a reversible heat engine burning coal (which in practice canno...
- 5.10CGP: If the efficiency of a power plant goes up as the low temperature d...
- 5.11CGP: If the efficiency of a power plant goes up as the low temperature d...
- 5.12CGP: A coal-fired power plant operates with a high temperature of 600°C,...
- 5.13CGP: Heat transfer requires a temperature difference (see Chapter 3) to ...
- 5.14CGP: Hot combustion gases (air) at 1500 K are used as the heat source in...
- 5.15HP: A window-mounted air conditioner removes 3.5 kJ from the inside of ...
- 5.16HP: A lawnmower tractor engine produces 18 hp using 40 kW of heat trans...
- 5.17HP: Calculate the thermal efficiency of the steam power plant cycle des...
- 5.18HP: A refrigerator operates at steady state using 500W of electric powe...
- 5.19HP: A room is heated with a 1500-W electric heater. How much power can ...
- 5.20HP: Calculate the COP of the R-134a refrigerator described in Example 4...
- 5.21HP: Calculate the thermal efficiency of the steam power plant cycle des...
- 5.22HP: A large coal fired power plant has an efficiency of 45% and produce...
- 5.23HP: A window air conditioner (Fig. P5.23) discards 1.7 kW to the ambien...
- 5.24HP: An industrial machine is being cooled by 0.4 kg/s water at 15°C tha...
- 5.25HP: Calculate the COP of the R-410a heat pump cycle described in 4.123....
- 5.26HP: A window-mounted air-conditioner unit is placed on a laboratory ben...
- 5.27HP: A farmer runs a heat pump with a 2-kW motor. It should keep a chick...
- 5.28HP: A sports car engine delivers 100 hp to the driveshaft with a therma...
- 5.29HP: R-410a enters the evaporator (the cold heat exchanger) in an air-co...
- 5.30HP: In a Rankine cycle 0.9MWis taken out in the condenser, 0.63MWis tak...
- 5.31HP: An experimental power plant outputs 130 MW of electrical power. It ...
- 5.32HP: A water cooler for drinking water should cool 25 L/h water from 18°...
- 5.33HP: A large stationary diesel engine produces 5 MW with a thermal effic...
- 5.34HP: For each of the cases below, determine if the heat engine satisfies...
- 5.35HP: For each of the cases in 5.34, determine if a heat pump satisfies t...
- 5.36HP: Calculate the amount of work input a refrigerator needs to make ice...
- 5.37HP: Prove that a cyclic device that violates the Kelvin– Planck stateme...
- 5.38HP: Discuss the factors thatwould make the power plant cycle described ...
- 5.39HP: Discuss the factors that would make the heat pump described in 4.12...
- 5.40HP: Assume a cyclic machine that exchanges 6 kW with a 250°C reservoir ...
- 5.41HP: Consider a heat engine and heat pump connected as shown in Fig. P5....
- 5.42HP: Consider the four cases of a heat engine in 5.34 and determine if a...
- 5.43HP: The simple refrigeration cycle is shown in 5.23 and in Fig. 5.6 Men...
- 5.44HP: Calculate the thermal efficiency of a Carnot cycle heat engine oper...
- 5.45HP: An ideal (Carnot) heat engine has an efficiency of 40%. If the high...
- 5.46HP: In a few places where the air is very cold in the winter, such as ?...
- 5.47HP: Consider the combination of a heat engine and a heat pump, as in 5....
- 5.48HP: Find the power output and the low T heat rejection rate for a Carno...
- 5.49HP: A large heat pump should upgrade 4MWof heat at 65°C to be delivered...
- 5.50HP: A temperature of about 0.01 K can be achieved by magnetic cooling. ...
- 5.51HP: The lowest temperature that has been achieved is about 1 × 10?6 K. ...
- 5.52HP: Consider the setup with two stacked (temperaturewise) heat engines,...
- 5.53HP: Assume the refrigerator in your kitchen runs in a Carnot cycle. Est...
- 5.54HP: A car engine burns 5 kg fuel (equivalent to addition of QH) at 1500...
- 5.55HP: An air conditioner provides 1 kg/s of air at 15°C cooled by outside...
- 5.56HP: A refrigerator should remove 400 kJ from some food. Assume the refr...
- 5.57HP: Calculate the amount of work input a freezer needs to make ice cube...
- 5.58HP: A heat pump is used to heat a house during the winter. The house is...
- 5.59HP: A household freezer operates in a room at 20°C. Heat must be transf...
- 5.60HP: Thermal storage is made with a rock (granite) bed of 2 m3 that is h...
- 5.61HP: A proposal is to build a 1000-MW electric power plant with steam as...
- 5.62HP: A certain solar-energy collector produces a maximum temperature of ...
- 5.63HP: A constant temperature of?125°C must be maintained in a cryogenic e...
- 5.64HP: Helium has the lowest normal boiling point of any of the elements a...
- 5.65HP: R-134a fills a 0.1-m3 capsule at 20°C, 200 kPa. It is placed in a d...
- 5.66HP: A heat engine has a solar collector receiving 0.2 kW/m2 inside whic...
- 5.67HP: A heat pump is driven by the work output of a heat engine, as shown...
- 5.68HP: Sixty kilograms per hour of water runs through a heat exchanger, en...
- 5.69HP: A power plant with a thermal efficiency of 40% is located on a rive...
- 5.70HP: A nuclear reactor provides a flow of liquid sodium at 800°C, which ...
- 5.71HP: The management at a large factory cannot decide which of two fuels ...
- 5.72HP: A salesperson selling refrigerators and deep freezers will guarante...
- 5.73HP: A cyclic machine, shown in Fig. P5.73, receives 325 kJ from a 1000-...
- 5.74HP: Consider the previous problem and assume the temperatures and heat ...
- 5.75HP: Repeat 5.61 using a more realistic thermal efficiency of 45%. 5.61A...
- 5.76HP: An inventor has developed a refrigeration unit that maintains the c...
- 5.77HP: A heat pump receives energy from a source at 80°C and delivers ener...
- 5.78HP: In a remote location, you run a heat engine to provide the power to...
- 5.79HP: A car engine with a thermal efficiency of 33% drives the air-condit...
- 5.80HP: A large heat pump should upgrade 5 MW of heat at 85°C to be deliver...
- 5.81HP: A refrigerator maintaining a 5°C inside temperature is located in a...
- 5.82HP: The ocean near Hawaii is 20°C near the surface and 5°C at some dept...
- 5.83HP: A house is cooled by a heat pump driven by an electric motor using ...
- 5.84HP: An air conditioner in a very hot region uses a power input of 2.5 k...
- 5.85HP: A small house that is kept at 20°C inside loses 12 kW to the outsid...
- 5.86HP: Consider a room at 20°C that is cooled by an air conditioner with a...
- 5.87HP: A car engine operates with a thermal efficiency of 35%. Assume the ...
- 5.88HP: Arctic explorers are unsure if they can use a 5-kW motor-driven hea...
- 5.89HP: Using the given heat pump in the previous problem, how warm could i...
- 5.90HP: A window air conditioner cools a room at TL =20°C with a maximum of...
- 5.91HP: A house is cooled by an electric heat pump using the outside as the...
- 5.92HP: A heat pump has a COP that is 50% of the theoretical maximum. It ma...
- 5.93HP: The room in 5.90 has a combined thermal mass of 2000 kg wood, 250 k...
- 5.94HP: A window air conditioner cools a room at TL = 22°C, with a maximum ...
- 5.95HP: On a cold (?10°C) winter day, a heat pump provides 20 kW to heat a ...
- 5.96HP: In the previous problem, it was assumed that the COP will be the sa...
- 5.97HP: Hydrogen gas is used in a Carnot cycle having an efficiency of 60% ...
- 5.98HP: Carbon dioxide is used in an ideal gas refrigeration cycle, the rev...
- 5.99HP: An ideal gas Carnot cycle with air in a piston/ cylinder has a high...
- 5.100HP: Air in a piston/cylinder goes through a Carnot cycle with the P–v d...
- 5.101HP: A 4L jug of milk at 25°C is placed in your refrigerator, where it i...
- 5.102HP: Consider the combination of the two heat engines, as in Fig. P5.4. ...
- 5.103HP: Consider a combination of a gas turbine power plant and a steam pow...
- 5.104HP: We wish to produce refrigeration at?30°C. Areservoir, shown in Fig....
- 5.105HP: Redo the previous problem, assuming the actual devices both have a ...
- 5.106HP: A house should be heated by a heat pump, ?? =2.2, and maintained at...
- 5.107HP: Give an estimate for the COP in the previous problem and the power ...
- 5.108HP: A farmer runs a heat pump with a motor of 2 kW. It should keep a ch...
- 5.109HP: An air conditioner with a power input of 1.2 kW is working as a ref...
- 5.111HP: The air conditioner in the previous problem is turned off. How quic...
- 5.112HP: Air in a rigid 1-m3 box is at 300 K, 200 kPa. It is heated to 600 K...
- 5.113HP: A Carnot heat engine, shown in Fig. P5.113, receives energy from a ...
- 5.114HP: Acombination of a heat engine driving a heat pump (see Fig. P5.114)...
- 5.115HP: A furnace, shown in Fig.P5.115, can deliver heat, QH1, at TH1, and ...
- 5.116HP: Consider the rock bed thermal storage in 5.60. Use the specific hea...
- 5.117HP: Consider a Carnot cycle heat engine operating in outer space. Heat ...
- 5.118HP: A Carnot heat engine operating between a high TH and lowTL energy r...
- 5.119HP: Ona cold (?10°C) winter day, a heatpump provides 20kWto heat a hous...
- 5.120HP: A 10-m3 tank of air at 500 kPa, 600 K acts as the high-temperature ...
- 5.121EUP: A window-mounted air conditioner removes 3.5 Btu from the inside of...
- 5.122EUP: A lawnmower tractor engine produces 18 hp using 40 Btu/s of heat tr...
- 5.123EUP: Calculate the thermal efficiency of the steam power plant cycle des...
- 5.124EUP: A large coal-fired power plant has an efficiency of 45% and produce...
- 5.125EUP: An industrial machine is being cooled by 0.8 lbm/s water at 60 F th...
- 5.126EUP: A water cooler for drinking water should cool 10 gal/h water from 6...
- 5.127EUP: A window air-conditioner unit is place on a laboratory bench and te...
- 5.128EUP: A farmer runs a heat pump with a 2-kW motor. It should keep a chick...
- 5.129EUP: R-410a enters the evaporator (the cold heat exchanger) in an air-co...
- 5.130EUP: A large stationary diesel engine produces 2000 hp with a thermal ef...
- 5.131EUP: Calculate the amount of work input a refrigerator needs to make ice...
- 5.132EUP: Calculate the thermal efficiency of a Carnot-cycle heat engine oper...
- 5.133EUP: A steam power plant has 1200 F in the boiler, 630 Btu/s work out of...
- 5.134EUP: A large heat pump should upgrade 4000 Btu/s of heat at 175 F to be ...
- 5.135EUP: A car engine burns 10 lbm of fuel (equivalent to the addition of QH...
- 5.136EUP: Consider the combination of a heat engine and a heat pump, as given...
- 5.137EUP: An air conditioner provides 1 lbm/s of air at 60 F cooled from outs...
- 5.138EUP: We propose to heat a house in the winter with a heat pump. The hous...
- 5.139EUP: Consider the setup with two stacked (temperature-wise) heat engines...
- 5.140EUP: Thermal storage is provided with a rock (granite) bed of 70 ft3 tha...
- 5.141EUP: A heat engine has a solar collector receiving 600 Btu/h per square ...
- 5.142EUP: Six hundred pound-mass per hour of water runs through a heat exchan...
- 5.143EUP: A power plant with a thermal efficiency of 40% is located on a rive...
- 5.144EUP: Anuclear reactor provides a flowof liquid sodium at 1500 F, which i...
- 5.145EUP: An inventor has developed a refrigeration unit that maintains the c...
- 5.146EUP: A car engine operates with a thermal efficiency of 35%. Assume the ...
- 5.147EUP: In a remote location, you run a heat engine to provide the power to...
- 5.148EUP: A heat pump cools a house at 70 F with a maximum of 4000 Btu/h powe...
- 5.149EUP: A small house kept at 77 F inside loses 12 Btu/s to the outside amb...
- 5.150EUP: A house is cooled by an electric heat pump using the outside as the...
- 5.151EUP: Arctic explorers are unsure if they can use a 5-kW motor-driven hea...
- 5.152EUP: Using the given heat pump in the previous problem, how warm could i...
- 5.153EUP: Carbon dioxide is used in an ideal gas refrigeration cycle, the rev...
- 5.154EUP: Air in a piston/cylinder goes through a Carnot cycle with the P–v d...
- 5.155EUP: We wish to produce refrigeration at ?20 F. A reservoir is available...
- 5.156EUP: An air conditioner on a hot summer day removes 8 Btu/s of energy fr...
- 5.157EUP: The air conditioner in the previous problem is turned off. How quic...
- 5.158EUP: A window air conditioner cools a room at TL = 68 F with a maximum o...
- 5.159EUP: The room in 5.158E has a combined thermal mass of 4000 lbm wood, 50...
- 5.160EUP: A 350-ft3 tank of air at 80 lbf/in.2, 1080 R acts as the high-tempe...
- 5.161EUP: Air in a rigid 40-ft3 box is at 540 R, 30 lbf/in.2. It is heated to...
- 5.110HP: An air conditioner on a hot summer day removes 8 kW of energy from ...

# Solutions for Chapter 5: Fundamentals of Thermodynamcs 8th Edition

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ISBN: 9781118131992

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