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2. Use a heat engine as an example to show that AStotal 2 0. It is...
Complete Analysis of Heat Engine Goal Solve for the efficiency of a heat engine using a five-step process the includes: 1. Making a state table. 2. Making a process table. 3. Calculating the totals for Work, Heat, and Internal-Energy-Change. 4. Identifying the heat input (hot reservoir) and output (cold reservoir). 5. Calculating the efficiency of the engine. isothermal Problem Shown in the figure to the right is a cyclic process undergone by a heat engine. Your heat engine shall use...
Fall 2019 PChem 2. A certain heat engine operates between 590 °C and 170 °C. (a) What is the maximum efficiency of the engine? (b) How much heat is needed from the hot source for each 1.0 kJ of maximum work done? (c) For each 1.0 kJ of heat discharged into the cold sink, how much heat is supplied by the hot source? How much heat is discharged into the cold sink in a reversible process for each 1.0 kJ...
A reversible heat engine receives heat of 2000 kJ from a furnace at temperature of 600 0C and rejects waste heat into the house. The portion of work produced by this heat engine utilized to drive a reversible heat pump to warmup the same house during the winter. The house is to be maintained at 21 0C at all times even though outside temperature drops to -15 0C. If the net-work output of the combined heat engine and heat pump...
+ -/24 points Complete Analysis of Heat Engine Goal Solve for the efficiency of a heat engine using a five-step process the includes: 1. Making a state table. 2. Making a process table. 3. Calculating the totals for Work, Heat, and Internal-Energy-Change. 4. Identifying the heat input (hot reservoir) and output (cold reservoir). 5. Calculating the efficiency of the engine. isothermal Problem Shown in the figure to the right is a cyclic process undergone by a heat engine. Your heat...
3. (20 pts) In the Carnot engine (refer to the figure in question 2), an ideal gas undergoes a cycle of isothermal expansion (A → B), adiabatic expansion (B → C), isothermal compression (C → D), and adiabatic compression (D → A). All processes are assumed to be reversible. The volumes at the points are given that 2VA=VB and VC=2VD. Th is 650 °C and Tc is 30 °C. (1) Calculate the amount of heat added to one mole gas...
Question 2 (20%) A heat engine takes 425 kJ of heat from a reservoir at 1000 °C and discharges its excess heat to a reservoir at 400 °C. This heat engine produces 200 kJ net work. Explain mathematically if this engine is reversible or irreversible and if it is possible to have such a heat engine. Describe the physical reasoning behind your answer.
Fall 2019 PChem 7. A certain heat engine operates between 590 °C and 170 °C. (a) What is the maximum efficiency of the engine? (b) How much heat is needed from the hot source for each 1.0 kJ of maximum work done? (c) For each 1.0 kJ of heat discharged into the cold sink, how much heat is supplied by the hot source? How much heat is discharged into the cold sink in a reversible process for each 1.0 kJ...
(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...
Example: A heat engine contains an ideal gas confined to a cylinder by a movable piston. The gas starts at A, where T-300K B to C is an isothermal T expansion. (a) Find the number of moles (n) of gas (b) Find the temperature at B (c) Find AU, Q and W for the process A to B P(atm) WL) 15 10