Bundle: Electricity For Refrigeration, Heating, And Air Conditioning, 10th + Refrigeration And Air Conditioning Technology, 8th + Mindtap Hvac, 4 ... Whitman/johnson's Refrigeration And Air Condi
8th Edition
ISBN: 9780357261385
Author: Russell E. Smith
Publisher: Cengage Learning
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Textbook Question
Chapter 43, Problem 1RQ
How does a heart pump resemble a refrigeration system?
Expert Solution & Answer
To determine
The similarity between a heat pump and a refrigeration system.
Explanation of Solution
Heat pump is a mechanical-compression refrigeration system used to either heat or cool a controlled space. It is a reverse refrigeration cycle where the heat pump absorbs heat from a cold space and releasing it to a warmer one. They can absorb heat from the outdoor air in the winter and reject heat to the indoors. Since the heat pump has the advantage to pump heat into as well as out of a system, this system helps to provide both heating and cooling effects. The valve is used to redirect the suction and discharge gas at proper time to provide heat or cooling. By reversing the mode of operation, the indoor and outdoor coil changes their functions as well. Thus, the heat pumps resemble as a refrigeration machine.
In the cooling mode, the indoor coil works as an evaporator and outdoor coil functions as a condenser. In the heating mode, indoor coil functions as the condenser and the outdoor coil acts as an evaporator.
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3-55 A multifluid container is connected to a U-tube,
as shown in Fig. P3–55. For the given specific gravities
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Required information
Water initially at 200 kPa and 300°C is contained in a piston-cylinder device fitted with stops. The water is allowed to cool
at constant pressure until it exists as a saturated vapor and the piston rests on the stops. Then the water continues to cool
until the pressure is 100 kPa.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
Water
200 kPa
300°C
On the T-V diagram, sketch, with respect to the saturation lines, the process curves passing through the initial, intermediate, and final states of the water. Label the
T, P, and V values for end states on the process curves.
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Chapter 43 Solutions
Bundle: Electricity For Refrigeration, Heating, And Air Conditioning, 10th + Refrigeration And Air Conditioning Technology, 8th + Mindtap Hvac, 4 ... Whitman/johnson's Refrigeration And Air Condi
Ch. 43 - How does a heart pump resemble a refrigeration...Ch. 43 - Name the three common sources of heat for heat...Ch. 43 - What large line connects the indoor unit to the...Ch. 43 - Why is the indoor unit not called an evaporator?Ch. 43 - When is the outdoor unit called an evaporator? A....Ch. 43 - The indoor coil is called a condenser during...Ch. 43 - Why is it important to have drainage for the...Ch. 43 - Which metering device is most efficient in heat...Ch. 43 - Where is the only permanent suction line on a heat...Ch. 43 - What type of drier may be used in the liquid line...
Ch. 43 - Where must a suction-line drier be placed in a...Ch. 43 - What controls the heat pump to determine whether...Ch. 43 - Can a heat pump switch from heating to cooling and...Ch. 43 - What must be done when frost and ice build up on...Ch. 43 - True or False: All heat pumps are practical...Ch. 43 - Why are scroll compressors more efficient than...Ch. 43 - Describe why variable-speed compressor motors are...
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