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EGN 3343-Thermodynamics t Dr. Boutsen a) An inventor claims to have developed a food...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of which operates between constant-temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. For each engine, state and explain why it does or doesn't violate the 1st and 2nd Laws of Thermo. 1st law hint: Think quantity of work. 2nd Law hint: Think process efficiency. Engine 1 2 3 4 QH (J) 200 500 600...
A freezer is designed, based on vapor-compression refrigeration cycle. The designed conditions are: R-134a as refrigerant,...
A freezer is designed, based on vapor-compression refrigeration cycle. The designed conditions are: R-134a as refrigerant, with a cooling capacity of 500 kW; compressor of 70% efficiency, with a superheat of 10°C before compressor inlet; operation temperature of -10°C inside the refrigerator, with the environment temperature of 25°C outside the refrigerator; Determine the pressure range of refrigeration cycle if a 10°C difference is required to ensure effective heat transfer of evaporator and condenser; Plot the refrigeration cycle on P-h diagram;...
3. An inventor claims to have developed a heat pump that supplies 100 kW of heat...
3. An inventor claims to have developed a heat pump that supplies 100 kW of heat to a room and maintain 25°C while extracting 80 kW of energy (power) from the outside air at 0°C. Is this claim true? Show your calculation. If you write yes/no without calculation, you will not get any credit (10 points)
Engr 321 Thermodynamics, Web 2 and Web 3 Spring 2018 Homework 8 Due: Wednesday Apnil 25t...
Engr 321 Thermodynamics, Web 2 and Web 3 Spring 2018 Homework 8 Due: Wednesday Apnil 25t (Extension: Friday April 27 1. The water boiller of a Rankine cycle power plant runs at 3.0 MPa. The highest and lowest temperatures of the plant are 400°C and 60°C, respectively. Find the plant efficiency and the efficiency of a Carnot cycle opatng with the same temperatures. 2. The plant from the previous question has a major problem. The quality at the turbine outlet...
(45 pes) An inventor claims to have developed a steady flow device that operates on an electrical power input of 250 kW, has one inlet and two outlets. A stream of ammonia e device at 100 kPa and 20P...
(45 pes) An inventor claims to have developed a steady flow device that operates on an electrical power input of 250 kW, has one inlet and two outlets. A stream of ammonia e device at 100 kPa and 20PC at a rate of 1 kg/s. The two exiting streams ow rate, one is at 200 kPa, 20°C and the other is a saturated liquid at 10 aims that heat transfer occurs with an uniform surface temperature sume that kinetic and...
Problem #2 (30 The steam cycle described in Problem #1 wasted a significant amount of exergy to t...
Problem #2 (30 The steam cycle described in Problem #1 wasted a significant amount of exergy to the cooling water. A real cycle might cascade the energy down to a lower temperature cycle to utilise some of this exergy (regeneration). It might also use the heat to execute an industrial process (cogeneration). The cycle described below does both! inSeam generator Turbine 1.5 bar H20 cycle To industrial process H2OR-134a heat exchanger Turbine Refrigerant cycle R-134a cycle Pump Condenser Pump Return...
1) An inventor cla ims he has developed an engine based on the otto cycle. The engine operates between the temperature range of 1200 K and 300 K and with a compressiorn or False a. True b. False A co...
1) An inventor cla ims he has developed an engine based on the otto cycle. The engine operates between the temperature range of 1200 K and 300 K and with a compressiorn or False a. True b. False A container at a pressure of 110 kPa contains 10 kmol of Co2, 5 kmol of H20, 15 kmol of 02, 20 kmol of N2 2) Mole fraction of water is 0.2 Mole fraction of water is 0.3 Mole fraction of CO2...
Tutorial Questions 1 1. Water is the working fluid in an ideal Rankine cycle. The condenser...
Tutorial Questions 1.1. Water is the working fluid in an ideal Rankine cycle. The condenser pressure is kPa, and saturated vapor enters the turbine at 10 MPa. Determine the heat transfer rates, in kJ per kg of steam flowing, for the working fluid passing through the boiler and condenser and calculate the thermal efficiency.2. Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 16 MPa, and the condenser pressure is 8 kPa ....
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....
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle whi...
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle while interacting with two thermal reservoirs. The device absorbs 2000 kJ from the hight temperature reservoir at 1000 K, and releases certain amount of heat to the low temperature reservoir at 500 K. Now consider three claims on its thermal efficiency or per ormance: η 70, η 0%, and Y-40%. (a, 4 points) Formulate the entropy production for the cyclic process in terms of the...
.85-120 Thermodynamics Tutorial 3 Problem 1. An inventor claims to have invented 4 engines, each of which operates between constant-temperature reservoirs of 400 and 300 K. Consider the 1st and 2nd laws of thermodynamics to evaluate the engines. For each engine, state and explain why it does or doesn't violate the 1st and 2nd Laws of Thermo. 1st law hint: Think quantity of work. 2nd Law hint: Think process efficiency. Engine 1 2 3 4 QH (J) 200 500 600...
3. An inventor claims to have developed a heat pump that supplies 100 kW of heat to a room and maintain 25°C while extracting 80 kW of energy (power) from the outside air at 0°C. Is this claim true? Show your calculation. If you write yes/no without calculation, you will not get any credit (10 points)
Engr 321 Thermodynamics, Web 2 and Web 3 Spring 2018 Homework 8 Due: Wednesday Apnil 25t (Extension: Friday April 27 1. The water boiller of a Rankine cycle power plant runs at 3.0 MPa. The highest and lowest temperatures of the plant are 400°C and 60°C, respectively. Find the plant efficiency and the efficiency of a Carnot cycle opatng with the same temperatures. 2. The plant from the previous question has a major problem. The quality at the turbine outlet...
(45 pes) An inventor claims to have developed a steady flow device that operates on an electrical power input of 250 kW, has one inlet and two outlets. A stream of ammonia e device at 100 kPa and 20PC at a rate of 1 kg/s. The two exiting streams ow rate, one is at 200 kPa, 20°C and the other is a saturated liquid at 10 aims that heat transfer occurs with an uniform surface temperature sume that kinetic and...
Problem #2 (30 The steam cycle described in Problem #1 wasted a significant amount of exergy to the cooling water. A real cycle might cascade the energy down to a lower temperature cycle to utilise some of this exergy (regeneration). It might also use the heat to execute an industrial process (cogeneration). The cycle described below does both! inSeam generator Turbine 1.5 bar H20 cycle To industrial process H2OR-134a heat exchanger Turbine Refrigerant cycle R-134a cycle Pump Condenser Pump Return...
1) An inventor cla ims he has developed an engine based on the otto cycle. The engine operates between the temperature range of 1200 K and 300 K and with a compressiorn or False a. True b. False A container at a pressure of 110 kPa contains 10 kmol of Co2, 5 kmol of H20, 15 kmol of 02, 20 kmol of N2 2) Mole fraction of water is 0.2 Mole fraction of water is 0.3 Mole fraction of CO2...
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....
Problem 1 (10 points). Consider a newly invented power cyclic device performing a power cycle while interacting with two thermal reservoirs. The device absorbs 2000 kJ from the hight temperature reservoir at 1000 K, and releases certain amount of heat to the low temperature reservoir at 500 K. Now consider three claims on its thermal efficiency or per ormance: η 70, η 0%, and Y-40%. (a, 4 points) Formulate the entropy production for the cyclic process in terms of the...
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