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 22, Problem 7RQ
When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be higher in temperature than the entering air temperature.
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1. A standard refrigerating system with a heat exchanger is operating with a condenser pressure of 1571.2 kPa and
evaporator pressure of 421.35 kPa using refrigerant R22. If the liquid line from the condenser is soldered to the
suction line from the evaporator to form a heat exchanger and if as a result of this, the saturated vapor leaving
the evaporator is superheated by 10.
1. A standard refrigerating system with a heat exchanger is operating with a condenser pressure of 1571.2 kPa and
evaporator pressure of 421.35 kPa using refrigerant R22. If the liquid line from the condenser is soldered to the
suction line from the evaporator to form a heat exchanger and if as a result of this, the saturated vapor leaving
the evaporator is superheated by 10.
Determine
(a) temperature of refrigerant entering the compressor
(b) temperature of refrigerant leaving the compressor
(c) degree superheat leaving the compressor
(d) temperature of subcooled liquid leaving heat exchanger
(e) degree subcooled leaving the heat exchanger
(f) mass of flash gas per kg refrigerant entering evaporator
(g) compression ratio
(h) clearance volumetric efficiency of compressor if the
clearance volume is 5%
18 answers
(i) refrigerating effect
(i) mass flow rate of refrigerant per ton of refrigeration
(k) work on compressor
(1) work on compressor per ton of refrigeration
(m) condenser load
(n)…
How does a shell-and-coil condenser remove heat from the refrigerant?
Chapter 22 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 22 - Why do some condensers have to be cleaned with...Ch. 22 - The three materials of which condensers are...Ch. 22 - Who should be consulted when condenser cleaning is...Ch. 22 - When is the most heat removed from the refrigerant...Ch. 22 - After heat is absorbed into a condenser medium in...Ch. 22 - A water-cooling tower capacity is governed by what...Ch. 22 - When a standard-efficiency air-cooled condenser is...Ch. 22 - Four methods for controlling head pressure in an...Ch. 22 - The prevailing winds can affect which of the...Ch. 22 - True or False: Air-cooled condensers are much more...
Ch. 22 - The type of condenser that has the lowest...Ch. 22 - Compare the standard conditions of high-efficiency...Ch. 22 - Name two ways in which the heat from an air-cooled...Ch. 22 - Briefly describe what is meant by floating head...Ch. 22 - Explain how to flush impurities from a...Ch. 22 - Explain the basic operation of a combination ORI...Ch. 22 - Name two problems a refrigeration system may have...Ch. 22 - Briefly explain what is meant by condenser...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What are the approximate temperature ranges tor low-, medium-, and high-temperature refrigeration applications?arrow_forwardWhat is the common refrigerant used in absorption refrigeration machines?arrow_forwardThe condensing pressure is 260 psig and the condenser outlet temperature is 108F for R-22. By how many degrees is the liquid subcooled in the condenser? A. 12F B. 42F C. 7F D. 14Farrow_forward
- Four methods for controlling head pressure in an air-cooled condenser are ______, ______, _______, andarrow_forwardWelded ______sealed compressors are normally used in household refrigerators.arrow_forwardIf an ideal refrigeration cycle (using R-134a) operation at evaporator temperature -10 °C and Condenser temperature +30 °C, what is the dryness factor of the Refrigerant at entering evaporator?arrow_forward
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