Airxchange has a patented and proprietary process that essentially ‘melts’ the desiccant into the plastic energy transfer matrix so it is permanently fixed. Get contact details & address of companies manufacturing and supplying Heat Recovery Wheel, Energy Recovery Wheel across India. A heat wheel is a rotating apparatus generally used to reduce the energy consumed by air-conditioning equipment in humid locations. Airxchange has standardized on Silica Gel (Type A), a substance that has preference for the adsorption of water vapor molecules over other chemicals. It functions as a rotary heat exchanger, which means that it continually attempts to achieve thermal equilibrium. Wheels prove to be much more compact for airflows in excess of 1000 CFM. The desiccant wheels are not only used for air dehumidification, but also for enthalpy recovery. ERVs continually exchange air within a building utilizing fresh air supply and stale air exhaust fans within the ERV cabinet. In swimming pool applications or any application where it is preferred to exhaust water vapor from a building, a wheel with no desiccant coating, called a sensible wheel, is recommended. Airxchange uses Urethane, a durable material that is impervious to chemicals and aging that typically attack rubber based products. OA is then humidified by the transfer of water vapor from the exhaust to supply air stream. While the desiccant on the surface of the energy transfer matrix reduces the moisture content of the OA with respect to the exhaust, a percentage still enters the building. Heat Recovery Wheel and its working. Another factor is that it needs a turning mechanism to operate, which in turn requires maintenance. Heat recovery is a method which is increasingly used to reduce the heating and cooling demands (and thus energy costs) of buildings. Because of their ability to transfer water, wheels have a much lower frosting threshold (for similar conditions, 0°F). High efficiency moisture exchange minimizes HVAC equipment loads and first cost while maximizing energy savings, providing the lowest life cycle cost as compared to heat transfer devices with little to no moisture exchange capabilities. Thermal wheel heat exchangers function as regenerative heat recovery systems (WRG). There also are some drawbacks that must be considered, however. Also, the drive motor should be down so that the drive pulley is up to facilitate segment removal and maintenance. It also passes through the heat exchanger, giving up heat, and is helped on its way by the second blower, colored cyan. An energy recovery wheel, also referred to as an enthalpy wheel or heat wheel, is a major component in an energy recovery ventilator (ERV). Carryover Leakage – occurs in rotary recovery wheels as the wheel rotates from the exhaust to supply air stream. As the leading supplier of energy recovery wheels to most HVAC equipment manufacturers, Airxchange has 30 years’ experience manufacturing energy recovery ventilation products and components. The fan will consume more energy, and the starting costs will be greater, thus nullifying the amount of money that would have been saved by the lower air-conditioning energy consumption. Airxchange energy recovery wheels are available through most major HVAC OEMs in a wide variety of configurations. Finally, be sure all unit connections to the HVAC unit are sealed against leakage, the ERV is attached securely to the roof in case of a severe storm, and all filters and hoods are properly installed. ), the wheel needs an overnight soak in detergent every 3-6 months. Airxchange energy recovery technology enables Energy Recovery Ventilators, commonly referred to as ERV systems, to provide fresh outdoor air at 1/3 the cost of conventional systems. Heat Recovery Wheel (See Fig.1) performs opposite processes in the cooling season and the heating season. Industrial exhaust conditions (weld shop for instance) may have special requirements. Avoid plumbing vents, exhaust fans, and any other source of external air pollution. Energy Recovery Wheels also known in the industry as Energy Conservation Wheels, Energy Recovery Wheels, Enthalpy Wheels, Sensible Wheels, Hygroscopic Wheels, Condensation Wheels or Sorption Wheels. The concept of the heat wheel operates on the second law of thermodynamics, wherein heat will always move from areas of higher temperature to areas of lower temperature. • 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 Sensible effectiveness is estimated between 55 percent and 65 percent. All wheels have seals that act to prevent the direct transfer of air from one airstream to the other. The Airxchange wheel drive motor has been selected very conservatively to last the average life of the HVAC system. The heat wheel utilizes a huge surface area by means of a coil of materials such as mylar and other such stuff wound into a large disc which allows the air to pass through. (In climates that experience a lot of hours at these conditions, 3 the system is likely to use a sensible ener - gy-recovery technology, rather than a total energy wheel, and this control mode would not apply.) An energy recovery wheel, also referred to as an enthalpy wheel or heat wheel, is a major component in an energy recovery ventilator (ERV). An Enthalpy Wheel allows both heat (sensible) energy and moisture (latent) energy to be exchanged. Outdoor air raises Indoor Air Quality (IAQ) by reducing indoor air pollution improving the health and productivity of building occupants. As the device absorbs warmth from the air, the outdoor air stream temperature consequently drops. Airxchange wheels are offered by most major HVAC manufacturers as integrated energy efficiency solutions in packaged rooftop and air handling units. A sensible heat-recovery systems will transfer sensible (dry-bulb) heat from the exhaust air to the supply air entering the building. Heat wheels only transfer sensible heat. These motors are oversized for the relatively easy application of turning the wheel. Airxchange wheels are designed to last the life of the HVAC system, and come with a 5-year warranty and an AHRI third party test and certification label verifying published performance. Without an ERV, the energy in building exhaust air is wasted to the atmosphere while new, additional energy is consumed to heat or cool outdoor air to room conditions. A heat wheel is a rotating apparatus generally used to reduce the energy consumed by air-conditioning equipment in humid locations. Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. Use our latest AHRI Path A compliant software, AIRXWEB, to compare and select Airxchange AHRI Certified energy recovery components. Commercial building indoor air regulations require frequent exchange of stale indoor air with fresh outdoor air (often multiple changes per hour, depending on building use). Filters also are in place to ensure that the air entering and exiting the apparatus are clean. They have an L10 life of 30 or more years, which means the user will almost never have to replace a bearing. The matrix is designed to last the life of the HVAC system, 20 years or more. Energy recovery wheels with bypass dampers are commonly installed as part of your dedicated outdoor air handling unit. Another possibility is a structure where a certain amount of outdoor air intake is required. Airxchange’s unique, segmented, and sustainable wheel design provides a simple yet effective means of optimizing energy transfer performance for the life of the HVAC system. The Airxchange bond is permanent and lasts the life of the wheel and matrix. When the wheel rotates back to its starting point, it then sends the absorbed heat into the cold exhaust air while simultaneously being once more chilled. Other variants include enthalpy wheels and desiccant wheels. Heat wheel — This generally describes all rotation devices that transfer sensible-only energy . Rotating between two airstreams within the ERV cabinet (exhaust air and supply air), energy recovery wheels transfer heat and humidity from the warm/humid airstream to the cool/dry airstream. Airxchange wheel shaft bearings are permanently lubricated and sealed at the factory. Incorporating Airxchange energy recovery components into an HVAC system…. It was chosen to be a light and durable energy transfer material that can be easily washed clean. Rotating between two airstreams within the ERV cabinet (exhaust air and supply air), energy recovery wheels transfer heat and humidity from the warm/humid airstream to the cool/dry airstream. 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. This balances out the temperature in two adjacent locations, cooling hot air and warming cold air. Both wheels and plates transfer sensible heat. 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. Energy recovery wheel technology was first introduced in the U.S. and Canada in the 1970s in response to rising energy costs. Ordinarily in a non-smoking environment, a yearly inspection and vacuum can be sufficient. It is unaffected by salt, oils, or other corrosive elements. There are clear benefits to using a heat wheel. The heat wheel accomplishes thermal equilibrium by first being chilled by cool air directed by the exhaust fan. A run around loop may be the better choice to isolate the exhaust. When and when not to use the energy wheel continues to be a source of confusion we see on our jobs. If it is a comfort conditioning application with some toilet exhaust, the wheel can safely and successfully be used. Building codes vary by state. Reduced workload complements ongoing energy cost savings and allows downsizing of new or retrofit HVAC equipment for immediate return on investment. function of outdoor temperature and indoor relative humidity. Also referred to as a unit . Another drawback to fixed core/plate exchangers is size. One is to bypass supply air around the wheel and mixed with the remaining air to regulate temperature. Holding The Heat. The wheel should not be used in environments where temperatures exceed 170°F. For good humidity control, it is important that the cooling system be sized so the evaporator coil remains cold enough to remove moisture from the supply air before it enters the building’s ventilation system. Studies show that increased levels of outdoor air provides health and productivity benefits. Heat recovery units used in ventilation and air condition systems are based on some common principles: Return air; Rotating heat exchangers; ... the exchanger when the wheel passes through the outlet air flow. Airxchange energy recovery wheels are constructed with welded stainless steel and a patented energy transfer material that is impervious to corrosion – even in coastal and marine environments. The energy is transferred to the make-up air when the wheel passes through the make-up air. 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. It may be desirable to connect a short run of duct to either the supply or the exhaust air stream to avoid rooftop problems (this may be required for some applications by local codes). Thus saves some energy. In addition, first cost may be offset with energy recovery incentives offered by many utilities and local/state/federal governments. Note also that even a small heat wheel can be quite effective in transferring a high amount of heat, in keeping with the reduced size of the equipment. tions occur such that the wheel may be over-humidifying the entering outdoor air. In both winter and summer, as the difference between outdoor and indoor conditions (temperature and humidity) increase, the energy reduction and resulting cost savings increase. According to the EPA, “indoor air can be 2 – 5 times more polluted than outdoor air; therefore, most HVAC system designers understand that increased amounts of outdoor air supply is generally better for Indoor Air Quality (IAQ).” An ERV wheel allows you to increase the amount of outdoor air and still reduce operating cost. A unique flute design, coupled with numerous other design innovations, provides for the highest possible heat transfer characteristics while simultaneously reducing pressure loss parameters. When the OA is drier than EA the opposite occurs. Routine maintenance can be performed by non-technical personnel. An ERV uses site-recovered energy from building exhaust air (usually wasted to the atmosphere) to pre-condition fresh outdoor air for temperature and humidity, dramatically reducing building energy costs. In new construction, a smaller HVAC unit means smaller ductwork and electrical load, reducing cost throughout the system. Third, be sure the unit is level and any water that might blow or leak into the ERV from a driving rain can be drained. Airxchange, Inc. 85 Longwater Drive Rockland, MA 02370, Tel: 781-871-4816 Fax: 781-871-3029 Email: contact_us@airxchange.com, Improves HVAC system efficiency up to 40% –, Improves dehumidification capacity up to 75% –. A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of an air-handling system or in the exhaust gases of an industrial process, in order to recover the heat energy. Wash the segments or small wheels in a 5% solution of non-acid … Rotation of the wheel allows the heat and humidity to be transferred to the cooler, drier exhaust air as it passes through the wheel. Energy Recovery Options Heat Recovery Wheel Evaluation Parameters Heat Recovery Wheel Applications Green Buildings / Hospitals Our Presentation Today RH Management Concerns DOAS Concept & Technology Options DOAS Integration with Parallel system / Chilled beams Dehumidification Technology for swimming Pools Commercial Air & Gas Purification Units Pre-conditioning reduces workload on the heating and cooling system, reducing energy demand for treating outdoor air by up to 80%. From US Patent 5,632,334: Heat recovery ventilator with room air defrosting feature by Peter K. Grinbergs and Grant W. Miles. 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. Energy Recovery Wheel and is being ducted outdoors . Reduced HVAC equipment size means lower first cost and higher performance as the combination of the ERV and smaller-sized HVAC unit provide the same amount of work while using up to 40% less energy. As the wheel rotates into the incoming airstream, energy is released by the wheel to heat and humidify the incoming airstream closer to indoor conditions, reducing unit workload and energy consumed by the heating system. The very advantage claimed by most plate manufacturers – no moving parts – is also the limitation of the design. As a result, the outdoor air is conditioned closer to building conditions, reducing unit workload and energy consumed by the cooling system. First and foremost, be sure there are no rooftop sources of pollution near the supply air opening. Be sure the exhaust from the ERV is at least 90 degrees opposed to the supply air. The ability to remove moisture from outdoor air in summer and add moisture in winter makes energy recovery wheels ideal for most climates in the U.S. and Canada. ROTARY ENERGY RECOVERY WHEELS ... pre-heat coils can function as the energy discharge side of the loop in the outdoor air unit. This is because the desiccant coating depresses the frost point of the wheel by lowering the dew point of the leaving air. recovery wheel. 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. Contact us to know more! Major HVAC manufacturers offer Airxchange wheels for new and retrofit applications. They are suitable for use across the entire air flow rate range. The Airxchange wheel may be applied with confidence in seacoast applications that have proven problematic for aluminum wheels. Rotary wheel heat exchangers and cross flow heat exchangers are some of the common designs used in typical comfort-to-comfort sensible heat-recovery applications. There are 10 key reliability areas to take into account when selecting a heat recovery wheel. Typical wheels were made of metal and used on industrial applications where large amounts of outdoor air provided reasonable paybacks to the owner. Find here Heat Recovery Wheel, Energy Recovery Wheel manufacturers, suppliers & exporters in India. For these reasons, building code requirements for energy recovery ventilation require a minimum of 50% total (heat and moisture) effectiveness. Heat Recovery Wheel also called as Enthalpy wheels are very common in dedicated fresh handling units and AHUs. Our energy recovery technology provides a stable, robust product proven in hundreds of thousands of installations in almost every climate and facility type. Enthalpywheel is not the term. It recovers energy from high temperature exhaust air and transfer it to low temperature supply air with high efficiency. The rotary heat exchanger (also known as a Kyoto Wheel) is a form of air-side economizer that solves some of the problems associated with air-side economizers.Instead of introducing exterior air directly into the server room, the heat wheel transfers heat between … Most states recognize the IECC code and adopt it into their state codes. True 3Å Energy Recovery Wheel Unit — The complete, ready to install assembly consisting of motor, cassette seals, drive hub assembly controller(s) and sensors . First, if the exhaust air has noxious chemicals, the use of any wheel should be questioned. The physical structure of a heat wheel resembles an aluminum disk and an exhaust fan placed in the middle of two air ducts. The urethane belt is designed to last 10 years before a replacement may be required. Heat recovery ventilation (HRV), also known as mechanical ventilation heat recovery (MVHR), is an energy recovery ventilation system which works between two sources at different temperatures. This allows lower operating temps – usually 0°F – before frost control is required. superior to all other air-to-air energy recovery systems. Most energy recovery devices transfer heat (sensible) energy only. Silica Gel will transfer water vapor at original design levels as long as its surface is clean and free of oils or other coating agents that can block access to water vapor. In this way, better control of humidity levels, mold, and mildew is assured. Uniting Health, Energy, and Environment – Airxchange Energy Recovery Technology improves building HVAC system performance by efficiently preconditioning the outdoor air supply. Airxchange ERV wheels can also be used to replace wheels manufactured by others. 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