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 28, Problem 14RQ
Truck trailers with their own refrigeration systems, which are transported on railway cars, are called
A. self-contained refrigeration systems.
B. piggyback refrigeration systems.
C. double-layer refrigeration systems.
D. dependent refrigeration systems.
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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.
With 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.
Refrigeration
Chapter 28 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 28 - List the evaporating temperatures for liquid...Ch. 28 - Prob. 2RQCh. 28 - Prob. 3RQCh. 28 - Prob. 4RQCh. 28 - Prob. 5RQCh. 28 - Prob. 6RQCh. 28 - Prob. 7RQCh. 28 - Which are power supplies used for truck...Ch. 28 - What type of reserve capacity does truck...Ch. 28 - Why is truck refrigeration designed to provide...
Ch. 28 - How is the air distributed over the cargo in truck...Ch. 28 - Name two types of engines used for truck...Ch. 28 - Prob. 13RQCh. 28 - Truck trailers with their own refrigeration...Ch. 28 - Why is two-stage compression popular for...Ch. 28 - An R-404A system is operating with a -50F...Ch. 28 - Describe cascade refrigeration and tell why more...Ch. 28 - Why is a circulating brine system more attractive...Ch. 28 - Two methods used to power refrigeration...
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- Three advantages of unitary, stand-alone refrigeration modules in supermarket refrigeration are ______and _______.arrow_forwardWhy is truck refrigeration designed to provide low- and medium-temperature refrigeration?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
- 3. Explain the basic principles of the refrigeration process.arrow_forward4. The values of a vapor compression refrigeration cycle were given below. Calculate the values of refrigerant flow rate, refrigeration capacity, and the COP of the system. T1= Evaporator water outlet = 10 °C T2= Evaporator water inlet = 16 °C T3= Condenser water inlet = 16 °C T4= Condenser water outlet = 22°C Cooling water flow rate = 1.5 L/min Heating water flow rate = 1.5 L/min Enthalpy of R134a in evaporator outlet = 305 kj/kg, Enthalpy of R134a in evaporator inlet =115 kj/kg Enthalpy of R134a in condenser inlet =327 kj/kgarrow_forwardUse ashrae table and charts for reference statearrow_forward
- Explain the refrigeration cycle and its processes.arrow_forwardNumerate the practical applications of vapor refrigeration system.arrow_forwardNumber 3 The food storage room requires a cooling system with a capacity of 15 tons of refrigeration that operates at an evaporator temperature of -17.5 ° C and a condenser temperature of 37.0 ° C. The refrigerant used is R-134a and the system operates in saturated conditions. a. COP= b.Refrigerant flow rate = Answer in kg / s. c. Heat loss rate in condenser = Answer kJ / s.arrow_forward
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