Example 2: The following data apply to an air-conditioning system RSH=11.6 kW RLH=11.6 Kw In side condition 25°C & RH=50% & outside condition 35°C DBT & 27.8°C WBT Return air from the room is mixed with the outside air before entering the cooling coil a ratio 4:1 Return air from the room is mixed with the air leaving the cooling coil at a ratio 1:4, cooling coil by pass factor =0.1. The air may be reheated if necessary before suppling the condition, assume tdp=10°C. find 1- Supply air condition to the room 2- Refrigeration load (Colling coil load) 3- Total refrigeration capacity d- The quantity of fresh air supplied

Example 2: The following data apply to an air-conditioning system RSH=11.6 kW RLH=11.6 Kw In side condition 25°C & RH=50% & outside condition 35°C DBT & 27.8°C WBT Return air from the room is mixed with the outside air before entering the cooling coil a ratio 4:1 Return air from the room is mixed with the air leaving the cooling coil at a ratio 1:4, cooling coil by pass factor =0.1. The air may be reheated if necessary before suppling the condition, assume tdp=10°C. find 1- Supply air condition to the room 2- Refrigeration load (Colling coil load) 3- Total refrigeration capacity d- The quantity of fresh air supplied

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

Chapter10: System Charging

Section: Chapter Questions

Problem 15RQ: A service technician is charging an air-conditioning system that has a TX V as the metering device...

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Q2 The following data apply to an air-conditioning system Qs=11.6 kW QL=11.6 kW. Inside condition 25°C & RH=50% & outside condition 35°C DBT & 28°C WBT. Return air from the room is mixed with the outside air before entering the cooling coil a ratio 5:1 Return air from the room is mixed with the air leaving the cooling coil at a ratio 1:5 , cooling coil bypass factor =0.1. The air may be reheated if necessary before supplying to the condition space, assume Tdp=10°C. Find a) Supply air condition to the room. b) Refrigeration load (cooling coil load). c) Total refrigeration capacity. d) The quantity of fresh air supplied.
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QUESTION 1 A 120-ton capacity chiller, based on a refrigeration cycle, is used to maintain a coolant temperature of 35 deg. F. The chiller exchanges heat to the surrounding air at 70 deg. F. This unit utilizes a 150 hp motor. What is the rate of heat removal from the coolant, in Btu/hr? O1,440,000 O 381,675 O 1,821,675 O 120 QUESTION 2 A powerplant operates between a furnace at 990 deg. Fand cooling water delivered from a nearby river at 70 deg. F. What is the maximum possible efficiency of this powerplant, in %? Oa. 72.8% Ob. 27.2% Oc 92.9% Od.63.4% QUESTION 3 If fuel oil is supplied to a power plant furnace at a rate of 60,000 gallons/hr, and the oil has a heating value of 150,000 Btu/gallon, and the plant has a thermal efficiency of 30%, what is the power output of this plant (in MW)? Oa. 2637.6 Ob.9000 Oc 2700 d. 791.3
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