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 3, Problem 3RQ
One ton of refrigeration is
A. 1200 Btu.
B. 12,000 Btu/h.
C. 120,000 Btu.
D. 120,000 Btu/h.
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What is the Btu/hour output of an electric heater rated at 15 kilowatts?a. 51.15 Btu/hourb. 51,150 Btu/hourc. 5115 Btu/hourd. none of the above
A newly installed refrigeration system produces 250 Btu/lb of cooling.
Calculate the mass of refrigerant shall be used in the refrigeration
system to have a rating of one ton of refrigeration.
A. 1152 lb/day
B. 160 lb/hr
B. 1780 lb/day
D. 380 lb/hr
1. Define one ton of refrigeration.
Chapter 3 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 3 - Name three reasons why ice melts in an icebox:...Ch. 3 - What are the approximate temperature ranges tor...Ch. 3 - One ton of refrigeration is A. 1200 Btu. B. 12,000...Ch. 3 - Describe briefly the basic refrigeration cycle.Ch. 3 - What is the relationship between pressure and the...Ch. 3 - What is the function of the evaporator in a...Ch. 3 - What does the compressor do in the refrigeration...Ch. 3 - Define a superheated vapor.Ch. 3 - The evaporating pressure is 76 psig for R-22 and...Ch. 3 - If the evaporating pressure was 76 psig for R-22...
Ch. 3 - Define the term subcooled liquid.Ch. 3 - The condensing pressure is 260 psig and the...Ch. 3 - The condensing pressure is 260 psig and the...Ch. 3 - What is meant by a saturated liquid and vapor?Ch. 3 - What is meant by desuperheating a vapor?Ch. 3 - What happens to the refrigerant in the condenser?Ch. 3 - What happens to refrigerant heat in the condenser?Ch. 3 - The metering device A. cycles the compressor. B....Ch. 3 - What is adiabatic expansion?Ch. 3 - Describe flash gas, and tell how it affects...Ch. 3 - Quality means _________ when referring to a...Ch. 3 - Describe the difference between a reciprocating...Ch. 3 - List the cylinder color codes for R-12, R-22,...Ch. 3 - Define enthalpy.Ch. 3 - Define a pure compound refrigerant, and give two...Ch. 3 - Define net refrigeration effect as it applies to...Ch. 3 - Define heat of compression, and explain how it is...Ch. 3 - Define flash gas, and explain how it applies to...Ch. 3 - Define temperature glide as it pertains to a...Ch. 3 - Define a zeotropic refrigerant blend, and give an...Ch. 3 - Define a near-azeotropic refrigerant blend, and...
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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
- 2.) Explain the term one ton of refrigeration.arrow_forwardWhat is the static air powering watts of a fan designed to deliver 800m3/hr of air with static pressure of 5cm of water column on full delivery.a. 155.3 b. 95.7 c. 105.8 d. 122.6arrow_forwardWhat does a 1 ton refrigerant represent: a. The weight of the air conditione r b. The amount heat required to cool 1 ton of air in 1 hour c. The amount of heat required to melt 1 ton of ice at 0 degree in 24 hours d. The weight of the refrigerant used.arrow_forward
- Which of the following statement(s) is(are) correct? a. For closed system operating adiabatically, work is obtained from the direct conversion of internal enerft of the fluid to work. b. Work or mechanical energy can spontaneously be converted to geat. c. Thermal energy with some effort, can only be partially converted to mechanical energy. d. If a system's work is positive, work is done to the system; work done by the system is negative.arrow_forwardWhat is the unit of adiabatic constant? A. Jkg B. Unit less, pure number C. J/kg D. J/kgkarrow_forwardIdentify the number of needed tons of refrigeration effect (TR) should the exhibition center require in order for them to accommodate 4,000 attendees at an event. Take into consideration that the average human body generates a number of 400 BTUs in this question. Select the best answer. a. four TR b. eight TR c. six TR d. the correct answer is not stated in the choices. Identify the number of enthalpies that should be removed and can turn ice into a 450-gram of water that is sitting at a room temperature of 85 degrees Fahrenheit? ANS: _____ BTUarrow_forward
- A 1-ton air conditioner is a unit that will remove the amount of heat neededto melt one ton of ice in 24 hours. A ton has 2,000 pounds in it.a. If 144 Btu of heat are needed to melt 1 pound of ice, how many Btus woulda 1-ton air conditioner remove in 24 hours?b. How many Btus would a 1-ton air conditioner remove in 1 hour?arrow_forwardDifferentiate refrigerator and heat pump.arrow_forwardWhich of the following is not a true statement about heat transfer? a. Whenever the temperature of something changes, a transfer of heat has occurred. b. Conduction is the transfer of heat by infrared rays. c. Light bulbs are examples of heat transfer by radiation. d. Convection occurs when a hot object moves to an area with less heat.arrow_forward
- Quality means _________ when referring to a refrigerant.arrow_forward7. An engine is required to produce 4500 kg of dry steam per hour. The quality of steam in it is 90%. What must be the weight of the wet steam? A. 4778 kg/hr B. 5000 kg/hr C. 5258 kg/hr D. 6000 kg/hrarrow_forwardThe device that receives heat energy from source and that rejects heat into sink is known as O a. Heat Pump Ob. Heat Engine O. Turbine Od. Refrigeratorarrow_forward
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