Steam with quality 0.85 enters the condenser of a power plant at 20 kPa with a mass flow rate 10 kg/s. It is cooled by water from a nearby river by circulating through the tubes inside the condenser. If the steam leaves the condenser as saturated liquid at 20 kPa and the temperature rise of the cooling water is 15°C, (a) determine the minimum mass flow rate of the cooling water required, (b) determine the heat transfer rate from the steam to the cooling water. Hint: Average specific heats at room temperature can be used for the cooling water from river. Water

Steam with quality 0.85 enters the condenser of a power plant at 20 kPa with a mass flow rate 10 kg/s. It is cooled by water from a nearby river by circulating through the tubes inside the condenser. If the steam leaves the condenser as saturated liquid at 20 kPa and the temperature rise of the cooling water is 15°C, (a) determine the minimum mass flow rate of the cooling water required, (b) determine the heat transfer rate from the steam to the cooling water. Hint: Average specific heats at room temperature can be used for the cooling water from river. Water

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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A flashed-steam geothermal power plant is located where underground hot water is available as saturated liquid at 725 kPa, The well head pressure is 670 kPa. The flashed steam enters a turbine at 645 kPa and expands to 15 kPa, when it is condensed. The flow rate from the well is 33.3 kg/s. Determine: Draw the T-S diagram The mass flow rate of steam in kg/s The power produce in KW The cooling water flow in kg/s if water is available at 25 oC and a 15°C rise is allowed through the condenser.
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I need help on the following question: The vapour compression cycle (picture provided), utilises the refrigerant R134a flowing at 0.05 kg s-1. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, then: 1. You need to determine the theoretical input power to the compressor and the heat transfer (Φ) to theevaporator. Take the enthalpies h1, h2, and h3 to be 238.41, 263.68 and 81.5 kJ kg-1 (use the 'NH3 Refrigeration Table' where you can find online). 2. You need to determine the coefficient of performance based on your answer to the previous question (1). 3. You need to determine the compressors mechanical efficiency.
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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.
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