The requested URL /prod_detail.php?prod_id=2 was not found on this server. Air Handling for Energy Saving Air treatment unit for energy saving Retrieving the extracted air energy to pre-heat or pre-cool fresh air To achieve energy savings (gas, fuel, electricity) of an industrial site by treating the fresh air necessary to the air treatment systems. Solutions implemented by Clauger Working principle: retrieve the energy extracted from the glycolic water loop During winter, the aim is to pre-heat the fresh air and during summer to pre-cool the fresh air. Equipment: 4 AHU of 80,500 m3/h per unit, thus QV of 322,000 m3/h of pre-treated fresh ai During winter: A +5 air treatment unit’s outflow temperature when pre-treating fresh air at -10°C During summer: A +15 air treatment unit’s outflow temperature when pre-treating fresh air at +30°C. Retrieved power (P) of 421,7 kW per units, thus 1,684,000 W The environment concerns, the rising cost of the energy and the new regulations lead to build increasingly insulated buildings.

Then, the energy used to treat the fresh air becomes an important part of the energy consumption of the building. Euroclima has developed the ETA ACCU, a packaged unit equipped with a regenerative heat exchanger with two or more static storage matrixes. A damper system periodically alternates the airstreams. While one storage matrix is loaded with warm airstream – the other matrix is unloaded with cold airstream. > 90 % sensible efficiency (EN 308) > 75 % humidity efficiency (EN 308) ETA ACCU – DE-EN-IT Yes, if some spaces were added to both systems fresh air and zone loads would have been calculated twice. I'm not sure how the HVAC systems are setup in your building, usually the AHU conditions the fresh air and supplies it to each zone and each zone then has a fan-coil unit to handle zone loads (lights, people, envelope, etc.). If that is the case, you want to add all zones into one system as follows: - equipment type= terminal units

- air system type= 2 pipe fan coil - Ventilation= common ventilation system - Describe your Air Handling Unit under "Vent System Components" tab If some zones only have zone cooling (they don't get any fresh air), still add them to the system but enter "0" under "OA Ventilation Requirements" in the Space Properties Window. If some zones get fresh air but don't have any other cooling, still add them to the system but ensure all zone loads are zeroed (lights, equipment, people sensible & latent, wall areas, etc) in the Space Properties Window. LEEDR AP BD+C, M-ASHRAE, Mechanical Engineer e: asmith at mreng.ca The electronic message contained herein is private and confidential, intended only for the recipient(s) specified. If you have received this message in error, please delete it and notify us immediately. accompanying files are supplied as a matter of courtesy only. without warranty of any kind. Any person or business making use of the data

is responsible for confirming its accuracy and completeness. Engineering Ltd. is not responsible for edited or produced versions of this Date: Sun, 9 Sep 2012 16:29:08 -0700 (PDT) From: dele omotayo carrier heat and air conditioning units Subject: [Hap-users] Need help with HAP load calculationair conditioning units for townhouse I have provided a load calculation for a building which is supposed to haveair conditioning unit ice up a chiller plant to provide cooling through a fan coil unit and an AHU system to provide just fresh air(outdoor air ventilation) through diffusers. amount of chilled water will be supplied to the AHU to have the outdoor airI have been using carrier HAP and my challenge is how to go about

the system properties i.e equipment type and air system type. i am not sure if this was right but i created two systems (1)- air system name= fresh air system - equipment type= Chilled water AHU - air system type= CAV tempering ventilation Then i added spaces that required just fresh air in the zone component tab- air system name= cooling system Then i added spaces that required just cooling in the zone component tab. Thereafter, i created a plant name and chose generic chilled water plant asi added the two systems and generated a report. After these whole process, i was made to understand my load was duplicated,seemed to be too high. please i really need your input and correction on this. An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.

The basic function of the AHU is take in outside air, re-condition it and supply it as fresh air to a building. All exhaust air is removed, which creates an acceptable indoor air quality. Depending on the required temperature of the re-conditioned air, the fresh air is either heated by a recovery unit or heating coil, or cooled by a cooling coil.In buildings, where the hygienic requirements for air quality are lower, some of the air from the rooms can be re-circulated via a mixing chamber and this can result in significant energy savings. A mixing chamber has dampers for controlling the ratio between the return, outside and exhaust air. The AHU is a large metal box containing separate ventilators for supply and exhaust, heating coil, cooling coil, heating/cooling recovery system, air filter racks or chambers, sound attenuators, mixing chamber, and dampers. AHUs connect to ductwork that distributes the conditioned air through the building, and returns it to the AHU.A heat/cooling recovery exchanger is normally fitted to the AHU for energy savings and increasing capacity.