TÀI LIỆU - Đào tạo về thiết bị năng lượng - Hệ thống lạnh và điều hòa không khí (UNEP)


TO THE TRAINER
This PowerPoint presentation can be used to train people about the basics of refrigeration and air condonditioning. The information on the slides is the minimum information that should be explained. The trainer notes for each slide provide more detailed information, but it is up to the trainer to decide if and how much of this information is presented also.

Additional materials that can be used for the training session are available on www.energyefficiencyasia.org under “Energy Equipment” and include:
Textbook chapter on this energy equipment that forms the basis of this PowerPoint presentation but has more detailed information.
Quiz – ten multiple choice questions that trainees can answer after the training session.
Option checklist – a list of the most important options to improve energy efficiency of this equipment.


There are several heat transfer loops in a refrigeration system as shown in Figure 2. Thermal energy moves from left to right as it is extracted from the space and expelled into the outdoors through five loops of heat transfer:
Indoor air loop. In the left loop, indoor air is driven by the supply air fan through a cooling coil, where it transfers its heat to chilled water. The cool air then cools the building space.
Chilled water loop. Driven by the chilled water pump, water returns from the cooling coil to the chiller’s evaporator to be re-cooled.
Refrigerant loop. Using a phase-change refrigerant, the chiller’s compressor pumps heat from the chilled water to the condenser water.
Condenser water loop. Water absorbs heat from the chiller’s condenser, and the condenser water pump sends it to the cooling tower.
Cooling tower loop. The cooling tower’s fan drives air across an open flow of the hot condenser water, transferring the heat to the outdoors.

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