Another possibility is a structure where a certain amount of outdoor air intake is required. Other variants include enthalpy wheels and desiccant wheels. Calculate the reduction in required cooling energy. An energy recovery wheel consists of a circular honeycomb matrix of heat-absorbing material, which is slowly rotated within the supply and exhaust air streams of an air-handling system. Heat recovery is a method which is increasingly used to reduce the heating and cooling demands (and thus energy costs) of buildings. When a wheel is mounted horizontally, each corner must be properly supported to minimize racking. Airxchange wheels are the narrowest offered which minimizes the effect of (2) and limits the transfer in comfort applications where the pressures are balanced between supply and exhaust air streams to 3-5% total, well inside safe limits for comfort applications. The physical structure of a heat wheel resembles an aluminum disk and an exhaust fan placed in the middle of two air ducts. Energy recovery wheels with bypass dampers are commonly installed as part of your dedicated outdoor air handling unit. There are 10 key reliability areas to take into account when selecting a heat recovery wheel. The other is to control the rotating speed of the wheel with a variable speed drive. Thermal wheel heat exchangers function as regenerative heat recovery systems (WRG). In addition, the "green code" ASHRAE Standard 189 further reduces outdoor air thresholds requiring ERV and increases minimum ERV effectiveness to 60%. Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. The very advantage claimed by most plate manufacturers – no moving parts – is also the limitation of the design. The two common transfer mechanisms are (1) leakage driven by pressure differences between airstreams which the seals address and (2) the air carried over by the matrix by rotation from supply to exhaust and exhaust to supply. The apparatus, by merely rotating, enables heat to come into contact with cold air and thus accordingly transfer. Other manufacturer’s use adhesives, which break down over time. An energy recovery wheel, also referred to as an enthalpy wheel or heat wheel, is a major component in an energy recovery ventilator (ERV). The heat wheel is best used in locations where a large intake of outdoor air is needed, and where there is an exhaust air duct close by. 2.5. Heat Recovery Wheel and its working. A heat-recovery ventilator (HRV) is similar to a balanced ventilation system, except it uses the heat in the outgoing stale air to warm up the fresh air. This is because the desiccant coating depresses the frost point of the wheel by lowering the dew point of the leaving air. Airxchange ERV wheels can also be used to replace wheels manufactured by others. Our energy recovery technology provides a stable, robust product proven in hundreds of thousands of installations in almost every climate and facility type. • Segmented Media • Low to Zero Deflection Spokes • High Strength Rims • Patented rim connection system eliminates media failures • Tapered Roller Bearings L-10 life 1,000,000 hours As long as the water deposited is removed, the wheel stays above the frosting threshold. Airxchange uses Urethane, a durable material that is impervious to chemicals and aging that typically attack rubber based products. function of outdoor temperature and indoor relative humidity. The largest savings will be realized over time in reduced HVAC energy use – a system with an ERV wheel uses up to 40% less energy than a system without a wheel. 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