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 47, Problem 13RQ
The subcooling temperature in a condenser can be measured by taking the difference between the
A. suction pressure converted to temperature and the boiling refrigerant.
B. boiling temperature and the condensing temperature.
C. condensing temperature and the leaving-refrigerant temperature.
D). condensing temperature and the entering-refrigerant temperature.
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What is a condenser water?
The subcooling temperature in a condenser can be measuredby taking the difference between theA. suction pressure converted to temperature and theboiling refrigerant.B. boiling temperature and the condensing temperature.C. condensing temperature and the leaving-refrigeranttemperature.D. condensing temperature and the entering-refrigeranttemperature.
Draw the schematic and p-h diagram for the problem below:
A two-stage cascade refrigeration system uses ammonia as the working substance. The evaporator is at -35 degree Celsius and high pressure condenser is at 1514.2 kPa. The cascade condenser is a direct-contact type. The refrigeration load is 90 tons. Determine the a.) the COP, and b.) the quantity of the fluid entering.
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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- What is chilled liquid and condenser water?arrow_forwardThe approach temperature for the evaporator isA. the difference between the suction and head pressuresconverted to temperature.B. the difference between the refrigerant boiling temperatureand the suction-line temperature.C. the difference between the refrigerant boiling temperatureand the inlet water temperature.D. the difference between the refrigerant boiling temperatureand the leaving-water temperature.arrow_forwardThe thermocouple couldn't be directly used for temperature measurement, unless a reference point is defined. This reference point is: Select one: O a. The boiling temperature. b. All of the above. c. The ambient temperature. d. The mixture of ice-water temperature.arrow_forward
- 1. What other substance circulates in the refrigeration system with the refrigerant? 2. What would happen if there were more refrigerant in the system than the condenser and receiver could hold?arrow_forward8) Which of the following components is NOT within the refrigeration cycle?A: Expansion valveB: CompressorC: EvaporatorD: Extractorarrow_forwardWhich part in the mechanical heat pump is used to increase the refrigerant pressure? Select one: a. Condenser b. Evaporator c. Expansion valve d. Compressorarrow_forward
- Match the following to its correct definition a. boilerb. condenserc. reheaterd. open feedwater heatere. closed feedwater heaterf. turbineg. pump> It is where bled steam and/or water at different temperatures mix. It is where water is converted to steam.>It cools the condenser circulating water.>It is used to increase the pressure and/or elevation of feedwater.>It is where feedwater temperature increases as the steam condenses on the outside of the tubes carrying the feedwater. >It is where additional heat is absorbed by intermediate-pressure steam. >It is where power is developed due to the passage of steam to blades attached to a shaft allowed to rotate. >It is where exhaust steam rejects heat and condenses.arrow_forwardWhich list states the correct order of components for the absorption refrigeration? A) Evaporator, then absorber, then concentrator, then condenser. B) Absorber, then condenser, then evaporator, then concentrator. C) Condenser, then absorber, then concentrator, then evaporator.arrow_forward1. A temperature drop in the coolant entering the primary loop can be dangerous because,(a) Reactivity can increase as a result.(b) Pressure in the primary loop will decrease and water can flash to steam.(c) All of the above.(d) None of the abovearrow_forward
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