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(43) A power plant receives heat from a 900 K reservoir and rejects heat to a...
21 A Carnot heat engine receives heat from a reservoir at 700°C at a rate of...
21 A Carnot heat engine receives heat from a reservoir at 700°C at a rate of 6 MW and rejects the waste heat to the ambient at 300 K, as shown in the figure. The entire net power output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cold medium at -10°C and transfers it to the same ambient at 300 K. Determine:35235333333 a) The thermal efficiency of the heat engine. b) The...
Heat flows from a reservoir at 373 K to a reservoir at 273 K through a...
Heat flows from a reservoir at 373 K to a reservoir at 273 K through a 0.39-m copper [thermal conductivity 390 J/(s·m·C°)] rod with a cross-sectional area of 9.3x10-4 m2 (see the drawing). The heat then leaves the 273-K reservoir and enters a Carnot engine, which uses part of this heat to do work and rejects the remainder to a third reservoir at 173 K. How much of the heat leaving the 373-K reservoir is rendered unavailable for doing work...
(12 pts) A heat pump operating on a cyclic process receives heat from a reservoir at...
(12 pts) A heat pump operating on a cyclic process receives heat from a reservoir at 500°C and rejects the waste heat at a rate of 30 kW to the ambient air at 300 K. If the work output of the engine is 45 kw, determine if the cycle is possible, and if the cycle is reversible. Explain with calculations. Show calculations using both efficiency (Method 1) and Entropy generation (Method 2) analysis.
Determine the heat transferred when steam with isobarical process from a boiler tank till boiler is...
Determine the heat transferred when steam with isobarical process
from a boiler tank till boiler is left with 80% water only. The
boiler tank volume is 8 m3 and initially it has equal volumes of
steam and water at 1 Mpa
Q7/ A lower reservoir of the reversible refrigerator is maintained -30°C when ambient temperature is 30°C. The refrigerator is operated using a reversible heat engine working between 473°K and ambient temperature. Determine the ratio of heat transferred from high...
Page 2 of4 Problem A Carnot heat engine received heat from a reservoir at 900 °C...
Page 2 of4 Problem A Carnot heat engine received heat from a reservoir at 900 °C at a rate of 800 k./min and reject the waste heat to the sink at 27°C. The entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the refrigerated space at -5 *C and transfer it to the same sink at 27°C. 900 "C 800 kI min Determine: 27"C (a) The Camot heat engine thermal efficiency...
Page 2 of4 Problem A Carnot heat engine received heat from a reservoir at 900 °C...
Page 2 of4 Problem A Carnot heat engine received heat from a reservoir at 900 °C at a rate of 800 k./min and reject the waste heat to the sink at 27°C. The entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the refrigerated space at -5 *C and transfer it to the same sink at 27°C 900 ℃ 800 kI min Determine: 27-C (a) The Camot heat engine thermal efficiency...
In a large steam power plant, the combustion of coal provides a heat rate of -...
In a large steam power plant, the combustion of coal provides a heat rate of - 2500 MW at a flame temperature of T-1000 K. Heat is rejected from the plant to a river flowing at T. = 300 K. Heat is transferred from the combustion products to the exterior of large tubes in the boiler by way of radiation and convection, through the boiler tubes by conduc- tion, and then from the interior tube surface to the working fluid...
A Rankine Cycle based steam power plant produces 200 MW of power. Steam exits the boiler...
A Rankine Cycle based steam power plant produces 200 MW of power. Steam exits the boiler at 3 MPa and 500° C. The turbine exit is at 40 kPa. Isentropic efficiencies of the turbine and pump are 75% and 70% respectively. Show the cycle on a T-s diagram Calculate the mass flow rate of steam Determine the heat transfer rates in the boiler and condenser in MW Determine the cycle efficiency Determine the mass flow rate of the condenser cooling...
A reversible power cycle whose thermal efficiency is 39% receives 50 kJ by heat transfer from a hot reservoir at 310oC...
A reversible power cycle whose thermal efficiency is 39% receives 50 kJ by heat transfer from a hot reservoir at 310oC and rejects energy by heat transfer to a cold reservoir at temperature TC. Determine the energy rejected, in kJ, and TC, in oC. Determine the entropy production for the cycle, σcycle, in kJ/K.
A combined cycle power plant consists of two gas turbines; cach produces a net power of...
A combined cycle power plant consists of two gas turbines; cach produces a net power of 160 MW, and a 70 MW steam power cycle. The combustion of the fuel in the combustion chamber produces hot gases at 1400°C. The hot gases leaving the gas turbines are used to generate steam through the heat recovery steam generator (Boiler). The hot gases enter the heat recovery steam generator at 880°C and leaves at 660°C. Water enters the isentropic pump as saturated...
21 A Carnot heat engine receives heat from a reservoir at 700°C at a rate of 6 MW and rejects the waste heat to the ambient at 300 K, as shown in the figure. The entire net power output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cold medium at -10°C and transfers it to the same ambient at 300 K. Determine:35235333333 a) The thermal efficiency of the heat engine. b) The...
(12 pts) A heat pump operating on a cyclic process receives heat from a reservoir at 500°C and rejects the waste heat at a rate of 30 kW to the ambient air at 300 K. If the work output of the engine is 45 kw, determine if the cycle is possible, and if the cycle is reversible. Explain with calculations. Show calculations using both efficiency (Method 1) and Entropy generation (Method 2) analysis.
Determine the heat transferred when steam with isobarical process
from a boiler tank till boiler is left with 80% water only. The
boiler tank volume is 8 m3 and initially it has equal volumes of
steam and water at 1 Mpa
Q7/ A lower reservoir of the reversible refrigerator is maintained -30°C when ambient temperature is 30°C. The refrigerator is operated using a reversible heat engine working between 473°K and ambient temperature. Determine the ratio of heat transferred from high...
Page 2 of4 Problem A Carnot heat engine received heat from a reservoir at 900 °C at a rate of 800 k./min and reject the waste heat to the sink at 27°C. The entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the refrigerated space at -5 *C and transfer it to the same sink at 27°C. 900 "C 800 kI min Determine: 27"C (a) The Camot heat engine thermal efficiency...
Page 2 of4 Problem A Carnot heat engine received heat from a reservoir at 900 °C at a rate of 800 k./min and reject the waste heat to the sink at 27°C. The entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the refrigerated space at -5 *C and transfer it to the same sink at 27°C 900 ℃ 800 kI min Determine: 27-C (a) The Camot heat engine thermal efficiency...
In a large steam power plant, the combustion of coal provides a heat rate of - 2500 MW at a flame temperature of T-1000 K. Heat is rejected from the plant to a river flowing at T. = 300 K. Heat is transferred from the combustion products to the exterior of large tubes in the boiler by way of radiation and convection, through the boiler tubes by conduc- tion, and then from the interior tube surface to the working fluid...
A combined cycle power plant consists of two gas turbines; cach produces a net power of 160 MW, and a 70 MW steam power cycle. The combustion of the fuel in the combustion chamber produces hot gases at 1400°C. The hot gases leaving the gas turbines are used to generate steam through the heat recovery steam generator (Boiler). The hot gases enter the heat recovery steam generator at 880°C and leaves at 660°C. Water enters the isentropic pump as saturated...
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