Steam enters the condenser of a steam power plant at 30 kPa, a quality of 91 % and a mass flow rate (m) of 337 kg/min . It leaves the condenser as saturated liquid at 30 kPa. It is to be cooled with water from anearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to be heated to a temperature above 5°C.Part ADetermine the mass flow rate (m) of the cooling water.Express your answer to the nearest integer.Vol AEo In veckg/minSubmitRequest AnswerPart BDetermine the entropy generation rate (Sgen) in the heat exchanger.Express your answer to three significant figures.vec?kW/KSubmitRequest Answer國

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Answered: Steam enters the condenser of a steam…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Atmospheric air at 40°C dbt and 55% RH is passed over a cooling coil at the rate of 600 m'/mint. At exit from coil the air is saturated and its temperature is 8°C. The condensate also leaves at 8°C. Determine the amount of condensate leaving coil per minute and refrigeration in kW, The specific heat of superheated steam may be assumed to be 1.88 kJ/kg-K. Solve the problem without psychromatic chart.
Steam enters the condenser of a steam power plant at 30 kPa, a quality of 91 % and a mass flow rate (m) of 337 kg/min . It leaves the condenser as saturated liquid at 30 kPa. It is to be cooled with water from a nearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to be heated to a temperature above 5 °C. Part A Determine the mass flow rate (m) of the cooling water. Express your answer to the nearest integer. TVO A£o I vec ? kg/min Submit Request Answer Part B Determine the entropy generation rate (Sgen) in the heat exchanger. Express your answer to three significant figures. Πνα ΑΣφ vec kW/K Submit Request Answer
15- R134a enters a compressor with a heat loss of 200 W as saturated steam at -24 ºC and after compressing to 0.8 MPa, it exits the compressor at 60 ºC. The mass flow of R134a is 1.2 kg/s. Calculate the volumetric flow of the refrigerant at the compressor inlet. A-0,129 m3/sB-0,293 m3/sC-0,163 m3/sD-0,209 m3/sE- 0,347 m3/s (Note: This Turkish I'm using translate) orginal; R134a ısı kaybı 200 W olan bir kompresöre doymuş buhar olarak -24 ºC sıcaklıkta girmekte ve 0.8 MPa basınca sıkıştırıldıktan sonra kompresörden 60 ºC sıcaklıkta çıkmaktadır. R134a’nın kütlesel debisi 1.2 kg/s’dir.Soğutucu akışkanın kompresör girişindeki hacimsel debisini hesaplayınız.
Steam is delivered to turbine at 5.4 MPa and 600 degree C. Before condensation at 31 degree C, steam is extracted for feed water heating at 0.6 MPa. The turbine exhaust is 60 degree C. the required values of some state point properties are tabulated below. 7. Determine the quality of steam at the condenser inlet.
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Thermodynamics Refrigerant R-134a to the compressor of a refrigeration machine It enters at 140 kPa pressure and -10 °C, and exits at 1 MPa pressure. Volumetric flow of the refrigerant entering the compressor It is 0.23 m³/minute. The refrigerant enters the throttling valve at a pressure of 0.95 MPa and at 30 °C, and exits the evaporator as saturated steam at -18 °C. Adiabatic efficiency of the compressor It is 78%. Show the cycle in the T-s diagram. And; a) Calculate the power required to run the compressor. b) Calculate the heat absorbed per unit time from the cooled medium. ( COPSM=? ) c) Calculate, between the evaporator and the compressor, how much the pressure of the refrigerant drops and how much the heat gain.
Hi, Please find attahced two images. I understand there is more than one question here. Please feel free to take more credits to allow answersfor both parts, Thanks
It is suggested to pump 5,000 kg/h of a liquid at 114°C and 1.1 atm abs pressure from a reboiler of a distillation tower to a second distillation unit without cooling the liquid before this joins the pump in a given industrial operation. The liquid has a density of 866 kg/ m2 and a vapor pressure of 1.1 atm at this heat.condition. The reboiler-to-pump line has a friction loss of 5 kN/m2. a. To achieve a net positive suction head of 2.5 m, how far must the liquid level in the reboiler be maintained? b. Compute the power needed to drive the pump if the liquid is to be elevated 5 meters, the pressure in the second unit is atmospheri and the discharge line friction loss is 25 kN/ m2. The pump discharge line has a velocity of 2 m/s, and the pump-motor efficiency is 65 percent.
15m3/sofmoistairat45Cdb,31Cwbandpassesthroughairwasher. If the saturation efficiency is 90%. Determine the air state at the outlet of the air washer.
A boiler takes in feed water at 70 °C and generates steam at a pressure of 10 bar and drynessfraction 0.92. The wet steam enters a superheater and emerges with the same pressure at atemperature of 400 °C. If the steam flow rate is 5 tonnes per hour, determine (i) the rate atwhich heat transfer takes place in the boiler and (ii) the rate at which heat transfer takes placein the superheater. State any assumptions you have made in relation to the steady flowequation for the process.
A car wash service uses 150 litre of pressurized (3 bar) warm water (45oC) to wash each car. It takes 10 min to wash each car. The service has 10 washing lanes, and it is open from (14:00 to 21:00) every day and 360 day per year. Each day 400 cars are washed. Fresh water at 1 bar pressure and 15oC is pressurized in a pump and then heated to desired temperature. Assume pump operates adiabatically and its efficiency is 85%, which is defined as the ideal power input divided by the actual power input. The ideal power input is the product of the volumetric flow rate times the pressure drop across the pump. All the other equipment of the car wash uses 5 kW of power during operation. Current (first alternative) is to buy electricity from the utility and use a natural gas fired boiler to heat the water. Assume natural gas furnace used in heating has 90% overall efficiency defined as heating provided water to heating released from fuel. The heating value of the natural gas (CH4) is 55.5 MJ/kg,…
The air considered as the ideal gas flows through the compressor and heat exchanger at a volumetric flow rate of 26.91 m3 / min as shown in the figure. At the same time, a stream of liquid water passes through the heat exchanger. The information given in the figure is for continuous flow. Considering the compressor and heat exchanger as adiabatic and ignoring kinetic and potential energy changes, a) the power requirement of the compressor (kW) and the mass flow rate of the cooling water (kg / h),b) Calculate the entropy generation (kW / K) per unit time for the compressor and heat exchanger.

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