The Ocean Thermal Energy Conversion (OTEC) system in Hawai utilizes the surface water and deep water as thermal energy reservoirs Assume the ocean temperature at the surface to be 20 "C and at some depth to be 6 C
Q: A heat engine receives heat from the source at 1400°C and rejects heat to a sink at 40°C The thermal…
A: Given:TH=1400°C =1673 KTL=40°C =313 Kηt=0.55
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A: From the data given in question, Rate of heat rejection = QR = 360 kJ/min Power supplied = W = 2 kW…
Q: Q7: An air conditioning system is used to maintain a house at a constant temperature of 20 C. The…
A: Given:TL=20°CQ1=21000 KJ/hQ2=9000 KJ/hCOP=2.4
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A: Convert the temperature of surroundings or the sink into Kelvin. Here, tL is the temperature of the…
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A: Dear student, According to the guidelines I am allowed to answer only one…
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A: from the steam table for saturated liquid water at Ps = 1 MPa, Ts = 179.9oC = (179.9 + 273) K =…
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A: Heat Transfer: The transfer of heat from one body to another body due to the difference in…
Q: A Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when…
A: Write the given data.
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A: Given Pressure, P = 1.6 MPa Power, P = 2.3 kW
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A: Given data:-Rate of heat loss, qr=5400kJ/h-°CLet Lower temperature be THiger temperature,…
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A: NOTE:- As per our company guidelines we are supposed to answer only one question. Kindly repost…
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Q: A Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when…
A: The COP of the heat pump can be determined as shown below.
Q: determine the amount of power generated.
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Q: C.O.P. b. Refrigerant fl ow rate = .. Kg/s c. Rate of heat removed by condenser = .. Kj/s
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Q: Second Law of Thermodynamics A heat pump is used for cooling in summer and heating in the winter.…
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Q: Q5: Determine which removes heat from the food compartment at a rate of 6000000 J/h for each 1200 W…
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Q: Determine the net power required to operate the heat pump, in kW. whose coefficient of performance…
A: GivenCOP=2.5Qout=20kw
Q: (9) The coefficient of performance of a residential heat pump is 2.85. If the input power to this…
A: Consider a heat pump whose source and sink temperatures be TH and TL respectively. Let qr be the…
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A: Given: Air is at DBT =26 deg RH=50% inlet conditions DBT=35 deg WBT=28 deg To determine: Specific…
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A: Given data: The COP of the pump, COP = 3.2. The mass of the house, m = 1200 kg. The power consumed…
Q: A heat engine receives heat from a heat source at l1200°C and has a thermal efficiency of 40%. The…
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Q: Define thermal energy reservoir?
A: Thermal energy reservoir⇒ Thermal energy reservoir is defined as a thermodynamic system containing…
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A: Given data as per the question Outdoor temperature = 5°C House inside temperature =25°C Rate of…
Q: Two rigid tanks, each filled with 50 kg of air, have temperature of 900 K and 400 K. A heat engine…
A: Data given- T1 = 900 K T2 = 400 K m = 50 kg
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- The heat transfer coefficient between a surface and a liquid is 57 W/(m2K). How many watts per square meter will be transferred in this system if the temperature difference is 10C?65 kg/min of water is heated from 20°C to 80°C passing through the duct of 3 cm x 2 cm. The duct is heated by condensing the steam on its outer surface. Find out the length of the duct required. Properties of water, p = 995 kg/m³, µ = 7.65 × 10-kg/m-s C = 4.174 kJ/kg-K, K = 0.623 W/m-K Conductivity of duct material = 35 W/m-K Use the following correlations: Nu = 0.023 Re0.8 Pr0.4 for turbulent flow nu 4.36 for laminar flowThe blades of a wind turbine turn a large shaft at a relatively slow speed. The rotational speed is increased by a gearbox that has an efficiency of 0.93. In turn, the gearbox output shaft drives an electric generator with an efficiency of 0.95. The cylindrical nacelle, which houses the gearbox, generator, and associated equipment, is of length L = 6 m and diameter D = 3 m. If the turbine produces P = 2.5 MW of electrical power, and the air and surroundings temperatures are T = 25 oC and Tsur = 20 oC, respectively, determine the minimum possible operating temperature inside the nacelle. The emissivity of the nacelle is 0.83, and the convective heat transfer coefficient is h = 35 W/m2 .K. The surface of the nacelle that is adjacent to the blade hub can be considered to be adiabatic, and solar irradiation may be neglected. Use Fin or N number of fins to reduce the Ts of the nacelle less than 143 oC
- A cylindrical vessel (D=98,4 cm) is filled with water (ρ=1000 kg/m3, c=4.187 kJ/kg.K) to a depth of 113,64 cm. The initial temperature of the water is 15°C. Determine the time [min] required to increase the water temperature to 50°C when it is immersed into tank, filled with oil at 105°C. (NOTE: The overall heat transfer coefficient between the oil and the water is 284 W/m2.K. The surface area is 4.2 m2.)In determining the average rate of heating of a tank of 20% sugar syrup, thetemperature at the beginning was 20°C and it took 30 min to heat to 80°C. Thevolume of the sugar syrup was 50 ft3 and its density 66.9 lb/ft3. The specific heat ofthe sugar syrup is 0.9 Btu lb-1°F-1.(a) Convert the specific heat to kJ kg-1°C-1.(b) Determine the rate of heating, that is the heat energy transferred in unit time, in SI units (kJ s-1)The net radiant-heat exchange between a 20-by-20 ft rough plaster panel-heated ceiling and a 20-by-10-ft side wall, which has an emissivity of 0.80, is 2400 Btu/hr. If the surface temperature of the ceiling is 120 deg. F, determine the average surface temperature of the side wall.
- The condenser of a steam power plant operates at a pressure of 7.38 kPa (Tsat = 40°C). Steam at this pressure condenses on the outer surfaces of horizontal pipes through which cooling water circulates. The outer diameter of the pipes is 3 cm, and the outer surfaces of the pipes are maintained at 30°C. Determine the rate of heat transfer to the cooling water circulating in the pipes.The properties of water at the saturation temperature of 40°C are: hfg = 2407 × 10^3J/kg and ρv=0.05 kg/m3. The properties of liquid water at the film temperature: ρl = 994 kg/m3, Cpl =4178 J/kg°C, µl = 0.72 × 10^-3 kg/m.s, kl = 0.623 W/m°C Select one: a. 6758W b. 5758W c. 8758W d. 7758WQ#01: Write a short note on the following: What are the best possible solutions to increase the heat transfer rate of a body? Which material will transfer more heat? Either a material with thermal conductivity ? = 121 or ? = 22 . Justify your answer.. An automobile engine consumes fuel at a rate of 22 L/h and delivers 55 kW of power to the wheels. If the fuel has a heating value of 44,000 kJ/kg and a density of 0.8 g/cm3, determine the efficiency of this engine. Hint, Qa= mass of fuel * heating value. Draw and label the P-V and T-S diagrams.
- What are the three methods of Heat Transfer? Explain each.How does the science of heat transfer differ from the science of thermodynamics? Give your answers with real-life practical examples.Electric power is to be generated by installing a hydraulic turbine–generator at a site 100 mbelow the free surface of a large water reservoir that can supply water at a rate of 1500kg/s steadily. Determine the potential power output of the turbine (kW).