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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Chapter 47, Problem 22RQ
How is capacity control accomplished with a steam-driven absorption refrigeration machine?
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Chapter 47 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 47 - When a chiller is used, the secondary refrigerant...Ch. 47 - What are the two basic categories of chillers?Ch. 47 - Three types of compressors are used for chillers:...Ch. 47 - Blocked suction cylinder unloading is accomplished...Ch. 47 - True or False: The capacity control for a screw...Ch. 47 - Which of the following methods are used to...Ch. 47 - Describe a direct-expansion versus a flooded...Ch. 47 - What is the purpose of multiple passes in a...Ch. 47 - The approach temperature for the evaporator is A....Ch. 47 - What type of water-cooled condenser is used in...
Ch. 47 - The compressor used in low-pressure chillers is...Ch. 47 - List the types of metering devices used with...Ch. 47 - The subcooling temperature in a condenser can be...Ch. 47 - What causes a surge in a centrifugal chiller?Ch. 47 - Why is it important to keep an operating log on a...Ch. 47 - Which of the following metering devices is used in...Ch. 47 - The purge unit in a low-pressure chiller removes...Ch. 47 - In an absorption chiller, _______is used to create...Ch. 47 - The types of energy used to power a typical...Ch. 47 - True or False: Some absorption machines are...Ch. 47 - What is the common refrigerant used in absorption...Ch. 47 - How is capacity control accomplished with a...Ch. 47 - True or False: Single-phase induction,...Ch. 47 - Describe how a wye-delta is started and runs.Ch. 47 - Why is it important to have phase protection for...
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- Describe cascade refrigeration and tell why more than one refrigerant is used.arrow_forwardBriefly explain what is meant by a subcritical refrigeration cycle, and list its four processes.arrow_forwardWhat are the approximate temperature ranges tor low-, medium-, and high-temperature refrigeration applications?arrow_forward
- Please answer both subparts with explanation. ASAParrow_forwardHow does Refrigeration system work?arrow_forwardWith an aid of illustration/ schematic diagram, discuss the different methods of refrigeration, it's major components, refrigerant used, uses and applications. Do not include Vapor Compression Refrigeration.arrow_forward
- 3. When subcooling the liquid refrigerant:a. the refrigerating effect per unit mass increases. b. the mass rate of flow per unit capacity decreases. c. the volume flow rate per unit capacity decreases. d. the work of compression per unit mass remain the same. e. the COP increases. f. the theoretical power per unit capacity decreases. A simple saturated refrigeration cycle for R-12 system operates at an evaporating temperature of - 5oC and condensing temperature of 40oC. Show the effect from a to f if the liquid refrigerant is subcooled to 30 oC.arrow_forward10. Define refrigeration effect.arrow_forwardI. ESSAY/ ENUMERATION 1. GIVE ATLEAST 5 ADVANTAGES AND 5 DISADVANTAGES OF INORGANIC REFRIGERANTS. 2. HOW DOES A REFRIGERANT WORKS IN A REFRIGERATION SYSTEM? 3. DIFFERENTIATE POSITIVE AZEOTTROPES AND NEGATIVE AZEOTROPES IN TERMS OF THEIR APPLICATION IN REFRIGERATION SYSTEMS. 4. THE FOUR MAIN COMPONENTS OF A REFRIGERATION SYSTEM ARE COMPRESSOR, CONDENSER, EVAPORATOR AND AN EXPANSION VALVE. EXPLAIN BRIFLY THE FUNCTION OF EACH COMPONENT AND THE FLOW OF THE CYCLE.arrow_forward
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