Seasons-4 Energy Recovery SystemsEnergy recovery can substantially reduce mechanical heatingand cooling requirements associated with conditioningventilation air in most buildings, specially buildings require 100%outside air at high ventilation rates.Seasons-4 offers the most commonly used energy recoverysystems.

1

1- Energy Recovery Wheelsa) Enthalpy Wheelsb) Sensible Wheelsc) Desiccant Wheels

2- Air to Air fixed flat Heat Exchangers

3- Heat Pipes

4- Run-Around Loops

Energy Recovery Wheels:Energy recovery wheels are the most efficient energyrecovery devices, effectiveness ranging from 50% to 80%.

Exhaust Air

Return Air

Supply Air

Fresh Air

The wheels require routinemaintenance of the belt

Heat pipe

maintenance of the beltand the motor and goodfiltration.

Energy Recovery units with an Enthalpy wheel and a Sensiblewheel in each unit.

FIXED-FLAT HEAT EXCHANGERS

Plate heat exchanger are the second most efficient energy recovery systems,effectiveness ranging from 50% to 75%. Their most distinct advantage is thatthey have no moving parts.

Return Air

Supply Air

Fresh Air

Exhaust Air

Heat Pipe Heat Exchangers:

Heat pipe heat exchangers have the appearance of ordinary finned coils with specificamount of refrigerant . Effectiveness between 50% to 65%.Because they lack moving parts, Heat Pipes are low maintenance and very rarely fail.

Supply Air Return Air

Fresh Air

Exhaust Air

Wrap around Heat pipe

Run-Around Loops:

Fresh Air

Coil

Coil

FanSupply air

Run-Around Loops, also known as coil energy recovery loops, use a coil placed in eachair stream that are connected by pipes filled with a heat transfer fluid, generally a glycolSolution. Effectiveness ranging from 50% to 65%.

Fresh Air

Exhaust Air

Return Air

CoilFan

Pump Tank