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 1, Problem 2RQ
State the standard conditions for water to boil at 212°F.
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State the standard conditions for water to boil at 212°F.
What is the critical pressure of R-134a, in kPa?
QUESTION 12
Determine the type of steam, given:
Pressure: 60kPa
Interal Energy: 360 kl/kg
Saturated Liquid
O Saturated Vapor
O Superheated Vapor
O Wet Vapor
Chapter 1 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 1 - Temperature is defined as A. how hot it is. B. the...Ch. 1 - State the standard conditions for water to boil at...Ch. 1 - List four types of temperature scales.Ch. 1 - Under standard conditions, water freezes at ____C.Ch. 1 - Molecular motion stops at _______F.Ch. 1 - One British thermal unit will raise the...Ch. 1 - In which direction does heat flow? A. From a cold...Ch. 1 - Describe heat transfer by conduction.Ch. 1 - Increase in sensible heat causes A. a higher...Ch. 1 - Latent heat causes A. a higher thermometer...
Ch. 1 - Describe how heat is transferred by convection.Ch. 1 - Describe how heat is transferred by radiation.Ch. 1 - Specific heat is the amount of heat necessary to...Ch. 1 - Atmospheric pressure at sea level under standard...Ch. 1 - To change from psig to psia, you must add...Ch. 1 - Convert 80F of Celsius.Ch. 1 - Convert 22C to Fahrenheit.
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- Assuming an adiabatic system, how much energy would be required to completely boil 12 liters of water? Assume RT = 25degC.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*14. ao Two pots are identical except that the flat bottom of one is alu- minum, whereas that of the other is copper. Water in these pots is boiling away at 100.0 °C at the same rate. The temperature of the heating element on which the aluminum bottom is sitting is 155.0 °C. Assume that heat enters the water only through the bottoms of the pots and find the temper- ature of the heating element on which the copper bottom rests.arrow_forward
- 1arrow_forwardQ.1. A refrigeration process with interstage cooling uses refrigerant HFC-134a, and the outlet of the condenser is to be saturated liquid at 40°C. Refer to the following figure for stream numbers in your solution. The pressure of the flash chamber and the intermediate pressure between compressors is to be 290 kPa. The evaporator is to operate at -20°C and the outlet is to be saturated vapor. The flowrate of stream 1 is 23 kg/h. The flash chamber may be considered adiabatic. The compressors may be considered to be 80% efficient. a) What is the power input required to the first compressor? b) What are the flowrates of streams 6 and 7? What is the enthalpy of stream 4? Hot Side 6 5 Condenser 2nd Stage Compressor Throttle Valve 7 Flash Chamber Vapor Phase Only 1st Stage Compressor 8 Throttle Valve Evaporator 1 2 Cold Sidearrow_forwardb) The high pressure units on a steam plant operate at 10bar (gauge), and the condensate is sub-cooled by 9.5K. If the mass flow rate of condensate is 10 kg/s, use the provided steam tables to determine how much saturated steam at 1.5 bar this condensate could produce. Note it is sufficiently accurate for high pressure condensate, as in this question, to assume that the specific enthalpy is the same as for the saturated liquid at the same temperature.arrow_forward
- Evaporative cooling PLEASE DO NOT USE PSYCHROMETRIC CHART. THANK YOU In the diagram below inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft3/min. In the diagram above inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft^3/min. Problem #1: Assume that the exit temperature is T2 = 90 °F. For this model of the system and from thedata provided determine:a) The mass flow rate dry air through the system (lbm/sec).b) The rate of heat that is output from the R-134a condenser Qout…arrow_forwardPlease no written by hand solutions Explain briefly the importance of draft pressure during boiler operation.arrow_forwardThermodynamicsarrow_forward
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