Introduction Traditional forms of power include muscle (human and animal) wind, water and steam. However, our modern world is based on the availability of electricity to power our machines, heat and cool our homes, and preserve and cook our food. A basic knowledge of electricity is critical to understanding how heating, ventilating, air conditioning and refrigeration (HVACR) operates. Goals By […]
Electricity 101 // W.9.4 Read More »
This simple system shows the application of the Second Law. The compressor A adds energy to the refrigerant, and it becomes hot, just the way a hand operated tire pump does. Since the compressed refrigerant is hotter than the air blowing across the condenser B , the heat will flow to the cooler air. This is a transfer of heat
Basic Thermodynamics For Refrigeration and Air Conditioning – Part 2 // W.9.2 Read More »
An appreciation of the terms superheat and saturation is the key to understanding and troubleshooting air conditioning and refrigeration systems. Illustrations in this document show closed vessels for simplicity, but real systems consist of heat transfer surfaces (condenser and evaporator), a compressor and a restriction device. Goals By the end of this lesson you will understand superheat, saturation, subcooling, temperature glide
Basic Superheat, Saturation and Subcooling // W.9.3 Read More »
