surface condenser serving a 50,000-kW steam turbo-generator unit receives exhaust steam at the rate of 196,000 kg/hr. Vacuum in condenser is 702 mmHg. Sea water SG=1.03 and Cp=0.93 Btu/lb-F is used for cooling enters at 29.5C and leaves at 37.5C. From the steam condenser design, manufacturer consider 950 Btu/lb of steam condensed as heat given up cooling water. Calculate the required quantity of cooling water in m3/s.

surface condenser serving a 50,000-kW steam turbo-generator unit receives exhaust steam at the rate of 196,000 kg/hr. Vacuum in condenser is 702 mmHg. Sea water SG=1.03 and Cp=0.93 Btu/lb-F is used for cooling enters at 29.5C and leaves at 37.5C. From the steam condenser design, manufacturer consider 950 Btu/lb of steam condensed as heat given up cooling water. Calculate the required quantity of cooling water in m3/s.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter22: Condensers

Section: Chapter Questions

Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...

See similar textbooks

Similar questions

Welded ______sealed compressors are normally used in household refrigerators.
Refrigerators currently being manufactured in the United States are using______as their refrigerant.
What are the approximate temperature ranges tor low-, medium-, and high-temperature refrigeration applications?
Condensers in these refrigerators are all_______cooled.
Geothermal heat pumps, or water-source heat pumps, are classified as either _____loop or _____loop systems.
When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be higher in temperature than the entering air temperature.
Referring to Problem 1.74, how many kilograms of ice can a 3-ton refrigeration unit produce in a 24-h period? The heat of fusion of water is 330 kJ/kg.
An R-12 refrigeration system using a single compressor serves three evaporators of 50, 30 and 20 tons capacity in parallel to each other with an evaporating temperatures of 0 C(hg = 351.447 KJ/kg), -5 C(hg = 349.321 KJ/kg) and -10 C(hg = 347.134 KJ/kg), respectively. If the condenser is maintained at 40 C(hf = 238.535 KJ/kg), compute the COP of the system. Enthalpy at the end of compression is at 378 KJ/kg.
In a Refrigerant 12 system which serves a 212 kw evaporator at - 30 0C. The system uses two stage compression with intercooling and removal of flash gas. The condenser temp is 400C . Given that, h2=356kJ/kg, h4=367kJ/kg Compute the following: a.) mass flow rate at low stage compressor (m1)ANSWER: 1.53661 kg/s b.) mass flow rate at high stage compressor (m3)ANSWER: 2.11791 kg/s c.) low stage compressor workANSWER: 27.43931 kw d.) high stage compressor workANSWER: 32.63926 kw e.) total compressor workANSWER: 60.078575 kw f.) COPANSWER: 3.52871 g.) heat rejected in the condenserANSWER: 272.07857 kw
A Freon 12 vapour compression system operating at a condenser temperature of 45oC and an evaporator temperature of 5oC develops 10 tons of refrigeration. Using the p-h diagram for Freon 12, determine. (a) the discharge temperature and mass flow rate of the refrigerant circulated. (b) the theoritical piston displacement of the compressor and piston displacement per ton of refrigeration, (c) the theoritical horsepower of the compressor and horsepower per ton of refrigeration, (d) the heat rejected in the condensor, (e) the carnot COP and the actual COP of the cycle
The values of a vapor compression refrigeration cycle were given below. Calculate the values ofrefrigerant flow rate, refrigeration capacity, and the COP of the system.T1= Evaporator water outlet = 10 °CT2= Evaporator water inlet = 16 °CT3= Condenser water inlet = 16 °CT4= Condenser water outlet = 22°CCooling water flow rate = 1.5 L/minHeating water flow rate = 1.5 L/minEnthalpy of R134a in evaporator outlet = 305 kj/kg,Enthalpy of R134a in evaporator inlet =115 kj/kgEnthalpy of R134a in condenser inlet =327 kj/kg
Explain the condenser coils of a refrigerator must be cleaned periodically, and the airflow passages must not be blocked to maintain high performance.