Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 37, Problem 17RQ
Multiple-zone systems often use a(n) __________or a(n)___________to alleviate the problem of excess air when only some zones are calling for conditioning.
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a) Explain four factors in determining the comfort level for an air conditioning room.Suggest the typical value for those factors.
5. What are the features of the central air conditioning system?
6. What are the disadvantages of using central air conditioning?
Questions:
1) The cooling tower is a part of:
a. Air cooled refrigeration system.
b. Water cooled refrigeration system-
C. Low capacity refrigeration system.
2) The closed type cooling tower need pumping system less head than open type because:
a. The water loop is short.
b. The water loop is dosed.
c. The loop is open.
3) The air wet bulb temperature effect on the perftormance of cooling tower in:
a. Range
b. Арproach.
C. Both.
4) The centrifugal cooling tower is:
a. Induced draft type.
b. Blow through type.
c. Draw through type.
Chapter 37 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 37 - Name five changes that are made to air to...Ch. 37 - The two ways that fresh air enters a structure are...Ch. 37 - Which of the following types of fan is used to...Ch. 37 - True or False: Turbulence in airflow causes...Ch. 37 - Name two types of blower drives.Ch. 37 - Pressure in ductwork is expressed in which of the...Ch. 37 - What is a common instrument used to measure...Ch. 37 - Prob. 8RQCh. 37 - Name the two types of return-air systems in...Ch. 37 - What is the component that distributes air in the...
Ch. 37 - Warm air heats a room better if distributed A. low...Ch. 37 - Name four materials used to manufacture duct.Ch. 37 - The name of the fitting where the branch line...Ch. 37 - Prob. 14RQCh. 37 - Prob. 15RQCh. 37 - Prob. 16RQCh. 37 - Multiple-zone systems often use a(n) __________or...Ch. 37 - Prob. 18RQCh. 37 - Prob. 19RQCh. 37 - Prob. 20RQCh. 37 - If a rectangular duct system s (12in.26in.) has an...Ch. 37 - The equivalent feet of pressure drop for a group...
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- Problem 3 For the system to the right, why would we want to heat the hot water heater using the HVAC system, rather than more traditional methods (such as burning natural gas)? Home inside nir temp: 20°C hot wnter henter - 10 liters imax temp: 50'C) Subrooler (autside air temmp: 32°C) R14a refrigerant PJ P2 sat. Hquid Qhot-water P2= OF 16 MPa T2=70°C P4-P2 Throttle (adinbatic) Compressor ladiabatic) Fan PS = P13 Pl=400 Pa at vapor air flow Tair =-10°Carrow_forwardI need the answer as soon as possiblearrow_forward(c) Explain the lay out and the basic operation of a centralized air conditioning system (or chiller system).arrow_forward
- Which component is primarily responsible for the pressure in a cooling system? Select one: a. The thermostat b. The water pump c. The radiator cap d. The surge tankarrow_forwardWhat would operating an engine with 100% water in the cooling system cause? Select one: a. Corrosion of the metal parts in the cooling system b. Premature hose deterioration c. Engine overheating d. Loss of heat in the passenger compartmentarrow_forwardc) Explain the layout and the basic operation of a centralized air conditioning system(or chiller system).arrow_forward
- 1. (a) List out the classification of air-conditioning system. (b) With the aid of following sketch diagram(s) Fig.1, explain the working principle and details of the loops involved in the centralized HVAC building system. . Fresh Air Necessary considering IAQ Water 12°C 137°C Water Return Air 24°C Pump Air-handling Supply Unit Air Chiller Fan 7°C Cooling Tower 14°C Produce chilled water (7°C) 32°C Supply Air Pump Heat Gain or 24°C Return Air Heat Gain Room Chiller Fan Air cool chiller Heat rejected to the environment Fig.1 Systematic diagram of an air-conditioning systemarrow_forwardWhat happens if the evaporator fan motor do in a refrigerator stops during the cooling cycle? Select the correct answer: A. the uni maintains 35 to 45 degrees B. the unit temperature falls below 32 degrees C. th unit shuts down D. the evaporator freezes over and the temperature risesarrow_forwardQ2 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.arrow_forward
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