An OTEC plant utilizes the difference between the surface temperature of 30C and dumps 580 kJ...
An OTEC plant utilizes the difference between the surface temperature of 30C and dumps 580 kJ of waste heat to cold deep water of 7C. a) what is the maximum efficiency that can be expected? b) The OTEC system extracts 600kJ of energy from warm surface water of 30C and dumps 580kJ of waste heat to cold deep water of 7C. What is the actual efficiency? c) Estimate the required flow rate yield 1.0MW from an ideal heat engine when deltaT = 20C.
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An OTEC plant utilizes the difference between the surface
temperature of 30C and dumps 580 kJ...
An open-cycle OTEC system operates with warm surface water at 24 C and surface condenser water...
An open-cycle OTEC system operates with warm surface water at 24 C and surface condenser water of 14 C from the deep cold water at 12 C. The evaporator pressure is 0.0264 bar that corresponds to a saturation temperature of 22 C, and the condenser pressure and temperature are 16 C and 0.0182 bar. The turbine efficiency is 0.83. If the turbine is to extract 100 kW, determine the system efficiency and the warm water, cold water, and turbine mass...
A nuclear power plant has a reactor that produces heat at the rate of 870 MW....
A nuclear power plant has a reactor that produces heat at the rate of 870 MW. This heat is used to produce 240 MW of mechanical power to drive an electrical generator. (a) At what rate is heat discarded to the environment by this power plant? MW (b) What is the thermal efficiency of the plant? A research group plans to construct an engine that extracts energy from the ocean, using the fact that the water temperature near the surface...
Calculate h1,h2,h3,h4 & Work turbine & Wpump from Rankine Cycle T1=5 Celisius & T2= 26.9 Celisius....
Calculate h1,h2,h3,h4 & Work turbine & Wpump from
Rankine Cycle T1=5 Celisius & T2= 26.9 Celisius. ( Ammonia) is
the fluid
However, Lockheed Martin a company that has paired up with The Reignwood Group to build a commercial 10 MW OTEC system which will be the largest OTEC system in operation to date [4). This will be a floating platform constructed off the coast of China where conditions are prime for an OTEC plant, which means a warm surface water...
An experimental power plant at the Natural Energy Laboratory of Hawaii generates electricity from the temperature gradient of the ocean. The surface and deep-water temperatures are 30 ∘C and 5 ∘C, res...
An experimental power plant at the Natural Energy Laboratory of Hawaii generates electricity from the temperature gradient of the ocean. The surface and deep-water temperatures are 30 ∘C and 5 ∘C, respectively What is the maximum theoretical efficiency of this power plant? If the power plant is to produce a power of 180 kW , at what rate must heat be extracted from the warm water? Assume the maximum theoretical efficiency (in watts). At what rate must heat be absorbed...
A proposed ocean power plant will utilize the temperature difference between surface seawater and seawater at...
A proposed ocean power plant will utilize the temperature difference between surface seawater and seawater at a depth of 100 meters. Assume the surface temperature is 25° Celsius and the temperature at the 100-meter depth is 3° Celsius. 1. What is the ideal (Carnot) efficiency of the plant? 2. If the plant generates useful energy at the rate of 100 megawatts while operating with the efficiency found in part (a), at what rate is heat given off to the surroundings?...
C. Calculation problems (12 marks each) 6. Generating electricity from a nuclear power plant A thermal...
C. Calculation problems (12 marks each) 6. Generating electricity from a nuclear power plant A thermal heat at a rate of 1.2 GW and at a temperature of 450 C. This heat is used in an engine that is connected to the sea water at T 20°C as low temperature reservoir. The engine has an efficiency of 51%. nuclear power plant generates (A) What is the electrical power output of this power plant? (The electrical enerzy output is equal to...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let us also assume that we find a geothermal well under the Pacific not too far off shore. We are going to extract hot water from the well (at 940 C) and expel the waste heat at the ocean's surface (at an average constant temperature of 14° C.) a) What is the maximum possible efficiency of a heat engine operating between these two temperatures? b)...
all six plz (better with explaination) 25. A real (non-Carnot) heat engine, opcrating between heat reservoirs at temperatures of 650 K (hot) and 270 K (cold) performs 4.3 kJ of net work and rej...
all six plz (better with explaination)
25. A real (non-Carnot) heat engine, opcrating between heat reservoirs at temperatures of 650 K (hot) and 270 K (cold) performs 4.3 kJ of net work and rejects 8.0 kJ of heat in a single cycle. The thermal efliciency of this heat engine is closest to A. 0.35. B. 0.31 C. 0.28 D. 0.38 E. 0.42 26. A 2.0-kg block of aluminum at 50° is dropped into 5.0 kg of water at 20°C and...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 2000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 1000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
Calculate h1,h2,h3,h4 & Work turbine & Wpump from
Rankine Cycle T1=5 Celisius & T2= 26.9 Celisius. ( Ammonia) is
the fluid
However, Lockheed Martin a company that has paired up with The Reignwood Group to build a commercial 10 MW OTEC system which will be the largest OTEC system in operation to date [4). This will be a floating platform constructed off the coast of China where conditions are prime for an OTEC plant, which means a warm surface water...
A proposed ocean power plant will utilize the temperature difference between surface seawater and seawater at a depth of 100 meters. Assume the surface temperature is 25° Celsius and the temperature at the 100-meter depth is 3° Celsius. 1. What is the ideal (Carnot) efficiency of the plant? 2. If the plant generates useful energy at the rate of 100 megawatts while operating with the efficiency found in part (a), at what rate is heat given off to the surroundings?...
C. Calculation problems (12 marks each) 6. Generating electricity from a nuclear power plant A thermal heat at a rate of 1.2 GW and at a temperature of 450 C. This heat is used in an engine that is connected to the sea water at T 20°C as low temperature reservoir. The engine has an efficiency of 51%. nuclear power plant generates (A) What is the electrical power output of this power plant? (The electrical enerzy output is equal to...
(heat engines) Let us propose that we use geothermal energy to drive a heat engine. Let us also assume that we find a geothermal well under the Pacific not too far off shore. We are going to extract hot water from the well (at 940 C) and expel the waste heat at the ocean's surface (at an average constant temperature of 14° C.) a) What is the maximum possible efficiency of a heat engine operating between these two temperatures? b)...
all six plz (better with explaination)
25. A real (non-Carnot) heat engine, opcrating between heat reservoirs at temperatures of 650 K (hot) and 270 K (cold) performs 4.3 kJ of net work and rejects 8.0 kJ of heat in a single cycle. The thermal efliciency of this heat engine is closest to A. 0.35. B. 0.31 C. 0.28 D. 0.38 E. 0.42 26. A 2.0-kg block of aluminum at 50° is dropped into 5.0 kg of water at 20°C and...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 2000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 1000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
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