The Heating, Ventilation and Air Conditioning (HVAC) and refrigeration system transfers the heat energy from or to the products, or building environment. Energy in form of electricity or heat is used to power mechanical equipment designed to transfer heat from a colder (low-energy level) to a warmer (high-energy level).
There are several heat transfer loops in refrigeration system as described below:
In the Figure above, 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 leftmost loop, indoor air is driven by the supply air “fan” over 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 outdoor.
These heat transfer loops are basic organs of any HVAC system and the functional efficiency of HVAC system is depends on maintaining heat transfer ratios to meet the design parameters. Any of these ratios are being affected due to playing up of the components highlighted above during day-to-day operation, the overall system efficiency is going to be affected.
HVAC Testing, Adjusting and Balancing (TAB) is an excellent first step in optimizing Heating, Ventilation, and Air Conditioning System. Just as tuning up a car, tuning up HVAC by implementing “HVAC Testing, Adjusting & Balancing” can reduce energy losses up to 20 % and prolong the life of the equipment’s.
This is a 5 Days skill up-gradation course structured for practicing engineers who has knowledge of HVAC commissioning, operation and maintenance. The topics covered are:
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- Theory / Case Study
- Fan Performance Testing (Practical)
- Air Balancing (Practical)
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- Theory / Case Study Pump Performance Testing (Practical)
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- Fan Performance Testing (Practical)
- System Effect (Case Study)
- Coil Performance Testing (Case Study)
- Hydronic Balancing (Practical)
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- Instruments Standard Operating Procedures
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- Hands on Experience using Various TAB Instruments
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- System Effects
- Measuring Instrument Accuracies
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