Retrofitting
Central Plant Design
The central plant of a large facility is where the chiller, boiler, cooling tower, and pumps are located. The total load of all the buildings conditioned by the equipment should be used to size the […]
Retrofitting
Retrofitting
Air-Cooled Condensing Unit
In a simple air-cooled compressor, outside air is forced across the refrigerant coil by a fan. The compressed refrigerant gas is cooled and liquefied. The gas returns to the cooling coil in the conditioned space, […]
Retrofitting
Transformer Sizing
A greater volume of electrical power can be transmitted at higher voltages and at a lower line loss. This is because losses are directly proportional to current losses by I2*R I = current and R […]
Retrofitting
Replace Air-Cooled Condensers with Cooling Towers
The maximum cooling by an air-cooled condenser is around 20°F difference between the air and refrigerant. And so, the refrigerant temperature approaches 115°F on a 95°F day in midsummer. Further cooling is not possible unless […]
Retrofitting
Reduce Neutral Leg Losses
Electrical designers assume that any current in the neutral leg of a three-phase circuit doesn’t incur any energy usage. This current happens when the three phases are not carefully balanced, and the balance has to […]