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 14, Problem 6RQ
To determine
Whether the statement "The temperature drop below the thermostat's set point is referred to a system lag." is true or false.
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Students have asked these similar questions
QUESTION 1
A 120-ton capacity chiller, based on a refrigeration cycle, is used to maintain a coolant temperature of 35 deg. F. The chiller
exchanges heat to the surrounding air at 70 deg. F. This unit utilizes a 150 hp motor. What is the rate of heat removal from the
coolant, in Btu/hr?
O1,440,000
O 381,675
O 1,821,675
O 120
QUESTION 2
A powerplant operates between a furnace at 990 deg. Fand cooling water delivered from a nearby river at 70 deg. F. What is the
maximum possible efficiency of this powerplant, in %?
Oa. 72.8%
Ob. 27.2%
Oc 92.9%
Od.63.4%
QUESTION 3
If fuel oil is supplied to a power plant furnace at a rate of 60,000 gallons/hr, and the oil has a heating value of 150,000 Btu/gallon,
and the plant has a thermal efficiency of 30%, what is the power output of this plant (in MW)?
Oa. 2637.6
Ob.9000
Oc 2700
d. 791.3
O a. None of these
O b. Absolute pressures and heat capacity ratio
O C. Absolute pressures and temperatures
O d. Gauge pressures and temperatures
In perfect gas law experiment, the pressure pump coupling is used to connect the vacuum vessel to the pump discharge
connector.
Select one:
O a. False
O b. True
Which part in the mechanical heat pump is used to reduce the refrigerant pnessule?
Select one:
comlpete the table
Definition
Application
First law of thermodynamics
Enthalphy
Chapter 14 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 14 - Why is a low-voltage thermostat normally more...Ch. 14 - The three kinds of switching mechanism used in...Ch. 14 - Prob. 3RQCh. 14 - What does a cold anticipator do?Ch. 14 - Define system overshoot when dealing with...Ch. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Describe the method a service technician should...Ch. 14 - Explain how microelectromc or electrontc...Ch. 14 - Prob. 10RQ
Ch. 14 - What component steps down the voltage to the...Ch. 14 - Low voltage is desirable for residential control...Ch. 14 - What is the maximum amperage usually encountered...Ch. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - What two types of switches are normally found in...Ch. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Why is a line-voltage thermostat mounted on an...Ch. 14 - What is the principle of operation for most...Ch. 14 - Describe a method for speedmg up the cooling of an...Ch. 14 - Describe two methods for cooling an overheated...Ch. 14 - How can an electronic thermometer be used in a...Ch. 14 - A temperature-sensing device used in measuring...Ch. 14 - How does a thermocouple change with a temperature...Ch. 14 - True or False: Pressures below atmospheric...Ch. 14 - Name one function of the low-pressure control.Ch. 14 - Which is true of a high-pressure control? A. It...Ch. 14 - Name two types of water pressure control.Ch. 14 - Why should a safety control not be adjusted if it...Ch. 14 - Prob. 31RQCh. 14 - True or False: A change in the differential...Ch. 14 - True or False: A change in the differential of a...Ch. 14 - Prob. 34RQCh. 14 - Explain what is meant by the range of a...
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- For every pound of pressure put on engine coolant, the boiling point of the coolant is raised about. 2°F(1.1°C) 3°F(1.6°C) 4°F (2.2°C) 5°F(2.7°C)arrow_forwardTrue or False: A thermocouple develops direct current and voltage.arrow_forward1- What is the pressure at the Economizer (in bar)? 2- What is the pressure at the Evaporator (in bar)? 3- How much heat received by the Economizer (kW)? 4- How much heat received by the Evaporator (kW)? 5- How much heat received by the Superheater (kW)? 6- How much heat received by the FWH (KW)?.. 7- How much heat received from the fuel burning (kW)? 8- How much heat rejected at the chimney (kW)?. T=35 C From the Pump m-1.3 kg/s + Cpw=4.2 kJ/kg.C ****************** T=150 C, To the Turbine Cp 1.008kJ/kg.K T=400C 44 T=212.2 X=0.0 X=0.85 Chimney Hoo bou to Economizer Evaporator Super Heater -Air, m-4 kg/s, T=20 C P=5 bar, X=0.8, m=0.3 kg/s from FWH X=1 1 Fuel, T-20 C, m=0.2 kg/s, C.V=33.5 MJ/kg Bumerarrow_forward
- Need answers from 1-17arrow_forwardGive me correct options with explanation please solve all questions thanksarrow_forwardA domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The kitchen itself is well insulated and it can be assumed no heat can escape or enter the kitchen from the outside. Which of the following is the most accurate statement. a. The temperature in the kitchen will go down very slightly. O b. The temperature in the kitchen could go up or down, depending on the Coefficient of Performance (COP) of the refrigerator. O c. The temperature in the kitchen could go up or down depending on the mechanical efficiency of the compressor. O d. The temperature in the kitchen will stay the same. O e. The temperature in the kitchen will go up very slightly.arrow_forward
- Dehumidifier is an example of which of the following? Closed System Open System Isolated System None of the abovearrow_forwardReducing the freezer's temperature setting of a refrigerator can save electricity cost. True Falsearrow_forwardThree different types of thermocouples generate different voltages when measuring the samé temperature because: Select one: a. They generate the same voltage at the same temperature. b. The voltage generated should be modified because of the use of the amplifier. c. They are made of different materials. d. There are instrument errors.arrow_forward
- Question is complete suppose any data if requiredarrow_forwardExactly matching the refrigeration load with the capacity of refrigeration compressors is referred to as A. capacity control. B. load shedding. C. load paralleling. D. load matching.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
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