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In a condenser of a power plant, the steam condenses at a temperature of 0 60 C . -gate-mechanical-20111 AnswerS team in the condenser of a thermal power plant is to be condensed at a temperature of 30C with cooling water which enters the tubes of the condenser at 14C and exits at 22C. The total surface area of the tubes is 50 m2, and the overall heat transfer coefficient is 2000 W/m2 K. The heat transfer (in MW) to the condenser is ______ (correct to two decimal places).0 AnswerIn a steam condenser the inlet and exit temperature of the odd stream are 20 and the steam condenses on outside surface of the tube.1 AnswerFor a gas turbine power plant, identify the correct pair of statements. (Gate mechanical engineering 2014)1 AnswerThe values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle -gate-mechanical-20111 AnswerSaturated steam at 100°C condenses on the outside of a tube. Cold fluid enters the tube at 20° C and exists at 50°C. The value of the Log Mean Temperature Difference (LMTD) is ________°C.1 AnswerIn an ideal Rankine cycle, steam enters the turbine at 10 MPa and 500 °C (ℎ = 3375.1 kJ/kg, 𝑠 = 6.5995 kJ/kg.K). It is cooled in the condenser at a pressure of 10 kPa. At 10 kPa, ℎ𝑓 = 191.81 kJ/kg, 𝑠𝑓 = 0.6492 kJ/kg.K, ℎ𝑔 = 2583.9 kJ/kg and 𝑠𝑔 = 8.1488 kJ/kg.K. The heat rejected in the condenser (in kJ/kg) is0 AnswerIn the Rankine cycle for a steam power plant the turbine entry and exit enthalpies are 2803 kJ/kg and 1800 kJ/kg, respectively. The enthalpies of water at pump entry and exit are 121 kJ/kg and 124 kJ/kg, respectively. The specific steam consumption (in kg/k W.h) of the cycle is _______1 AnswerExplain the working principle of electric power generation from hydro power plant with the help of a neat diagram. State its advantages and disadvantages.1 AnswerExplain with the help of a Temperature-Enthalpy diagram the formation of steam from water at 0˚ Celsius.1 AnswerWith the help of Temperature –Enthalpy diagram explain the generation of steam at constant pressure.1 AnswerA standard vapor compression refrigeration cycle operating with a condensing temperature of o 35 C and an evaporating temperature of o 10 C develops 15 kW of cooling. The p-h diagram shows the enthalpies at various states. If the isentropic efficiency of the compressor is 0.75, the magnitude of compressor power (in kW) is _________ (correct to two decimal places).0 AnswerIn which state is the Rawat Bhata nuclear power plant located? - CBSE Geography1 AnswerL og mean temperature difference (LMTD) correction factor (F) is applicable to (A) Spiral tube heat exchanger (B) Steam jacketed kettle (C) Plate heat exchanger (D) Evaporator tubes (GATE-Agricultural-Engineering-2018)0 AnswerA n insulated storage tank contains 1000 kg liquid of specific heat 10 kJ kg-1 K-1. The liquid is heated by saturated steam, condensing in a helical coil at a temperature of 180 oC. The heat transfer area of the coil is 0.1 m2. If the overall heat transfer coefficient is constant at 1000 W m-2 K-1, then the time (in hours) required to raise the temperature of the liquid in the tank from 20 oC to 80 oC is ____________ (rounded off to second decimal place).0 AnswerA ir is held inside a non-insulated cylinder using a piston (mass M=25 kg and area A=100 cm2) and stoppers (of negligible area), as shown in the figure. The initial pressure i P and temperature i T of air inside the cylinder are 200 kPa and 400C, respectively. The ambient pressure P and temperature T are 100 kPa and 27C, respectively. The temperature of the air inside the cylinder (C) at which the piston will begin to move is _________ (correct to two decimal places).0 AnswerMilk enters into the heating section of a high temperature short time (HTST) pasteurizati on plant at a temperature of 45ºC and leaves at 72 ºC. Hot water at temperature of 95 ºC enters counter - currently into the heat exchanger 1 AnswerThe hot tearing in a metal casting is due to: (Gate mechanical 2014 question paper)1 AnswerIf a mass of moist air in an airtight vessel is heated to a higher temperature, then -gate-mechanical-20111 AnswerDefine specific volume, enthalpy and internal energy for wet, saturated and superheated steam.1 Answer
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