Sheet 5 Q1/ In a condenser the vacuum of 71 cm of Hg is maintained with barometer reading of 76 cm in Hg. Temperature in condenser is 35°C while hot well is at temperature of 30°C. The cooling water is circulated at the rate of 800 kg/min and condensate is available at 25 kg/min. The temperature of cooling water at inlet and outlet are 15°C and 25°C. Determine the mass of air in kg/m³ of condenser volume, dryness fraction of steam entering condenser and vacuum efficiency. Take mercury density as 0.0135951 kg/cm³, g = 9.81 m/s².

Sheet 5 Q1/ In a condenser the vacuum of 71 cm of Hg is maintained with barometer reading of 76 cm in Hg. Temperature in condenser is 35°C while hot well is at temperature of 30°C. The cooling water is circulated at the rate of 800 kg/min and condensate is available at 25 kg/min. The temperature of cooling water at inlet and outlet are 15°C and 25°C. Determine the mass of air in kg/m³ of condenser volume, dryness fraction of steam entering condenser and vacuum efficiency. Take mercury density as 0.0135951 kg/cm³, g = 9.81 m/s².

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

See similar textbooks

Similar questions

How many tons of refrigeration are required to produce 10 metric tons of ice per day at -10 °C from raw water at 22 °C if miscellaneous losses are 15% of the chilling and freezing load? 3.
Steam is throttled to 0.1 MPa with 20- degrees of superheat. What is the quality of throttled steam in % if its pressure is 0.75 MPa? Use the approximate formula for enthalpy in superheated condition.
Q1: Steum at a pressure of 28kpa is passed into a condenser and it leawes as condensate at a temperature of sac Cooling water circulates through the condenser at the rate of 45 kg/min - It enters at 152 and Veaves at 3oc If the Steam flow rate is 1.25 eg/min, determinė the drynes fraction of Steam as it enters the condenser.
and exits at 50°C. The value of the Log Mean outside of a tube. Cold enters the tube at 20°C Saturated steam at 100°C condenses on the °C. Temperature Difference (LMTD) is
At throttling calorimeter receives steam from a boiler drum at0.11MPa and is superheated by 10 degrees. If the boiler drum pressure is 1.55 MPa, what is the quality of the steam generated by the boiler? with solution
2. An unknown gas (with PVT conditions of; 101 kPa, 2.83 m³ & 23°C) is to be transferred into a storage vessel of 0.34 m³ capacity. Initially the storage vessel contains the same type of gas at a pressure and temperature of 151 kPa and 34°C. After the transfer the pressure measure to be 1342 kPa. What is the resulting temperature of the gas inside, in Kelvin?
A refrigerating plant for an air-conditioning system removes 10,000 Btu/min from the air. The plant circulates 170 lb. of refrigerant per min and the internal power delivered is 60 Hp. The refrigerant evaporation temperature is 40 F, and it's condensation temperature is 100F. Calculate the capacity of the plant in tons. (include diagram)
Evaporator single effect is used to upgrade the concentrate 10000 kg/h of tomato juice than 5% solids the total to 30% solids total. Juice enters the Evaporator at 15 °C. The Evaporator is operated with Steam (quality 80%) in 143.27 kPa. The condition of vacuum in the Evaporator allow the juice to a boil on the 75 °C. The hot kind of material dilute is 4.1 kJ/(kg °C) and the product the concentrate is a 3.1 kJ/(kg °C). Count a. The Rate of the needs of steam = ...kg/h. b. The economic steam if the temperature is condensate is released at 75 °C. = ...(kg water evaporated/kg of steam)
A condenser of a steam power plant indicates a vacuum of 65 cm of Hg when barometer reads 75 cm Hg. The condensing steam has a temperature of 45 o C and a dryness fraction 0.9. Calculate: (i) the amount of air to be handled by the pump per min. if the rate of steam condensation is 2000 kg/hr. (ii) vacuum efficiency of the condenser.
The value of enthalpy at point 1 is ( hi2 ?) The value of enthalpy at point 3 is (h3?) The value of enthalpy at point 4 is (h4?) The value of steam mass flow rate in kg/s is The rate of heat supplied is
a cooling system with a capacity of 10 tons of refrigeration, operates at 210 kPa in the evaporator, while in the condenser is 1100 kPa. if refrigerant R-717 is saturated, calculate the theoretical power required to operate the compressor. compressor power = .... kW
In a condenser test, the following observations were made:Vacuum = 69 cm of HgBarometer = 75 cm of HgMean temperature of condenser = 35°CHot well temperature = 28°CAmount of cooling water = – 50,000 kg/hrInlet temperature = 17°COutlet temperature = 30°CAmount of condensate per hour = 1250 kgFind(a) the amount of air present per m3 of condenser volume.(b) the state of steam entering the condenser.(c) the vacuum efficiency .R for air = 287 J/kgK