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 33, Problem 9RQ
The device that relieves the pressure in a boiler when it is above the design working pressure is the ________valve.
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Chapter 33 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 33 - A hydronic heating system uses ______to move heat...Ch. 33 - Describe a zone in a hydronic heating system.Ch. 33 - Name four sources of heat commonly used for...Ch. 33 - Give three reasons that air is detrimental to a...Ch. 33 - Explain the difference between a wet-base and a...Ch. 33 - Where is air vented from a hydronic heating...Ch. 33 - The "point of no pressure change" is located at...Ch. 33 - The purpose of a limit control in a boiler is to...Ch. 33 - The device that relieves the pressure in a boiler...Ch. 33 - Describe the function of a low-water cutoff.
Ch. 33 - The relief valve setting for a typical...Ch. 33 - Describe how an air cushion tank functions in a...Ch. 33 - True or False: City water does not contain air.Ch. 33 - State two ways that air can get into a hydronic...Ch. 33 - The most common type of pump used for hydronic...Ch. 33 - Another term for pump pressure is feet of _______.Ch. 33 - Two types of zone control valves are the _____and...Ch. 33 - Why must expansion be considered when sizing...Ch. 33 - How is expansion in hot water pipes handled?Ch. 33 - Sketch the following systems: one pipe, two-pipe...Ch. 33 - Describe the advantage of a two-pipe...Ch. 33 - The pressure differential bypass valve is most...Ch. 33 - What is the heat output, in Btu/h, of a terminal...Ch. 33 - In a primary-secondary pumping arrangement, the...Ch. 33 - The temperature of the water at the outlet of a...Ch. 33 - A tankless water-heating system gets its heat from...Ch. 33 - How much of the sun's energy actually reaches the...Ch. 33 - The varying intensity of the sun's energy that...Ch. 33 - Drain-down systems would best be used in which...Ch. 33 - Why are solar systems intended to be used as a...
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- In order to limit the operating pressure in the lines downstream of a pressure-control valve, must it be normally passing or normally non-passing? Why?arrow_forwardSurface condensers increase turbine back pressure, is the statement true or falsearrow_forwardWhich one of these can be approximated as steady flow device? a)Nozzles, Diffusers, Thermal Expansion valves b)Evaporator, Compressor, Boiler c)All of the above d)Mixing chamber, Turbine, Condenser e)Heat Exchangers, Pipesarrow_forward
- What are the difference of chilled liquid and condenser water?arrow_forwardIn basic terms explain the ideal and the actual of the following cycle 1. Reheat-Regenerative2. Reheat 3. Rankine 4. Regenerativearrow_forwardb) Explain with suitable sketches the function of i) Components in the vapour compression cycleii) The indoor unit and outdoor unitiii) Cooling toweriv) Chillerarrow_forward
- When a refrigeration system that produces low or no cooling has high suction pressure and low head pressure , it probablyarrow_forwardFind the true order of the components of the refrigeration cycle? a) Evaporator-Compressor-Condenser-Expansion valve b) Condenser-Expansion valve-Evaporator-Compressor c) Evaporator-Compressor-Expansion valve-Condenser d) Expansion valve-Condenser-Compressor-Evaporator e) Compressor-Expansion valve-Condenser-Evaporatorarrow_forwardPROBLEM 1A vapor-compression heat pump system uses ammonia as working fluid.Saturated vapor exits the evaporator at 20°C, and saturated liquid leaves the condenser at1400 kPa. The isentropic compressor efficiency is 80%.Questions:Determine:(a) The heat transfer in the evaporator and in the condenser.(b) The compressor work.(c) The Coefficient of Performance.arrow_forward
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