Ventilation Air Conditioning

Download Evaporative Air-Conditioning: Applications for by Gert Jan Bom, Robert Foster, Ebel Dijkstra, Marja Tummers PDF

By Gert Jan Bom, Robert Foster, Ebel Dijkstra, Marja Tummers

'Under the appropriate stipulations and functions, evaporative air-conditioning (EAC) applied sciences delivers very good cooling and air flow with minimum power consumption.'

Evaporative air-conditioning applied sciences are getting used more and more in residential and advertisement functions all over the world. EAC applied sciences, which depend upon water as a coolant instead of on chemical refrigerants, are within your means to supply and use and feature very important environmental advantages. This paper introduces the technical elements of EAC, stories EAC's scope of software, and surveys the explicit weather conditions less than which EAC can be utilized such a lot successfully in industrialized and constructing nations.

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Additional info for Evaporative Air-Conditioning: Applications for Environmentally Friendly Cooling

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2. 3 Drafty zone Recommended operating zone Uneven cooling zone Source:Adapted from Watt (1986). contract. The regular maintenance consists of preparing the unit at the beginning of the cooling season by fitting new pads and lubricating the bearings. At the end of the season, the sump should be cleaned out by removing the scaling and repainting the inside. The following paragraphs set out the maintenance requirements for each component and type of problem affecting EACs: Maintenance of Pads Pads typically require regular maintenance or replacement, the frequency depending on the materials, construction, and conditions of use of the unit.

Commonly Available Rigid CellulosePads Provide Superior Saturation and Cooling Compared with Ordinary Aspen Pads Source: Munters Corporation. 4. Close-up of Rigid Cellulose Pad Made of Corrugated Paper Source:Munters Corporation. , dust washes off) No biological deterioration of the pad material More consistent saturation efficiency of about 75 to 90 percent Low pressure drop across the pad. The disadvantage is that rigid media are more costly (about US$100more on an EAC that would cost US$300if using aspen wood pads).

A psychrometric chart, which shows moist air properties, more clearly demonstrates the evaporative cooling process. The initial dry-bulb and wet-bulb temperatures are shown at the start of the process, and the endpoint of the evaporative cooling process is found to the left at the end of the arrow along the line of constant wet-bulb temperature. 3°F). 2 for Ciudad Juarez. 2. =85% a /4/ / // \ Evaporative ~~~Direct \ti~~Coling Process Cd. 7°C WB Dry-Bulb Tempearture °C Source:ECI. oa +;o 0 i 2 Technology 23 Direct evaporative coolers do not recirculate air in applications.

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