ENERGY CONSERVATION IN AIR-CONDITIONED SPACE USING ENTHALPY WHEELS

Energy conservation, in an air conditioned and mechanically ventilated buildings is achieved by recirculation of air and drawing just adequate volume of air to be cooled or heated, which in turn leads to energy savings.

However this concept produces an Indoor environment with high levels of chemical contaminants, bacteria, fungi and dust, which makes people who spend 85 to 90% of their time indoors, susceptible to illness related to air borne contaminants. Recent studies have proved that the levels of contaminants are several times higher in Indoor Air compared to outdoor air, in such Air-conditioned buildings.

The available solution of dilution or increased ventilation to the problem of pollution runs contrary to energy conservation guidelines. ASHRAE in their standard 62-1989 for Indoor Air quality (IAQ) specifies 20 Cubic Feet per Minute (CFM) per person, as recommended out door air requirement. IAQ as defined by ASHRAE, is that air quality, which provides acceptable comfort level to 80% of the people exposed to it. Engineers and Designers, today, face the challenge of designing cost-effective systems, which meets the requirements IAQ for air-conditioned spaces.

A properly designed air conditioning equipment should, sanitize, cool, heat, humidify, dehumidify and evenly distribute air throughout the area, at considerably economical cost.

To improve indoor air quality the fresh air that is mixed with indoor air needs to be treated. Conventional treatment of air, condenses water at the place of cooling which causes the discomfort.

In an ideal situation the fresh air is passed over a bed of desiccant which absorbs the moisture in air. The air with lesser moisture content is less prone to carry air borne contamination. Thus treated air is passed over a heat exchanger coil or chilled water to bring down the temperature.

Certain industries such as spinning mills, powder handling/manufacturing factories, etc need indoor conditions with specific moisture levels in air. These conditions are achieved using de-humidifiers. A conventional system involves a bed of desiccant which needs to be heated to drive out the moisture it has absorbed. This calls in for a maintenance difficulty. Development of technology has brought in rotary desiccant dehumidifiers. The dehumidifiers have a replaceable desiccant bed (with a long service life). Units working on these principles are compact, more energy efficient, automatic in functioning and are easy to install. This can also be integrated to an existing compressed air system.

Other Applications :
Dehumidifiers are also used to dry various products in place of shortage of power. Another effective use has been in seasoning of timber.

An ideal solution is found in Enthalpy Wheels, and in its efficiency features and in its methods of integration into HVAC system. This new generation Treated fresh air units have successfully addressed the needs of providing Indoor Air Quality with efficient use of energy.

As the focus now has shifted from environment to environment, a terminology being used increasingly to draw attention on Indoor Air Quality, Air conditioning designers, can rely on use of Enthalpy wheels into HVAC system, to create healthy Indoor Air quality, to reduce fatigue, absenteeism and loss of productivity.

Applications :

Leading architects have already switched over to international standards for maintaining Indoor Air Quality (IAQ) in Building Designs Your AC & R Consultant is your best guide to adding fresh air... at no extra cost using Sick Building Syndrome Air-borne pollutants, without fresh air dilution, build up in concentration leading to universally known phenomenon called 'Sick Building Syndrome'. New Ventilation Code For acceptable Indoor Air Quality (IAQ) ASHRAE Standard 62-1999 provides a minimum 20 cube feet per minute (cfm) of fresh air per person to reduce indoor air pollution to avoid health related symptoms. Obtain a copy of ASHRAE Standard today! ECOFRESH - Meeting the New Challenge EcoFresh Heat Wheels (desiccant     coated) recover over 80% energy     from exhaust air for precooling     incoming air, without adding to the     energy bill. Based on next generation      technology Certified/Tested by international     labs Exported to USA, Japan, Korea,     Malaysia, UAE, etc. IMPORTANT Public interest in indoor air quality and health is growing fast. Health hazards posed by recirculating polluted air in air-conditioned spaces forms the basis for legal action in many building related law suits in the Western world. And India may not be far behind. Write to us for more information ARCTIC INDIA ENGINEERING PVT. LTD. Delhi : 20, Rajpur Road, Delhi 110054. Ph:3912800 Fax: (011) 2947075,  E-mail:aisdelhi@pahwa.com *Mumbai: Ph:4935155 *Baroda:Ph:351493 *Kolkata: Ph:2472541 *Bangalore: Telefax:(080) 5097815 *Hyderabad: Ph:7154243  *Chennai :Ph:6287231 Website : www.dirirotors.com APA::WA ENTERPRISES               BB:38HVAI MADE IN INDIA For India... and for the world

Next Page