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Evaporative Air-Conditioning phần 3

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Lợi ích bao gồm chi phí thiết bị làm mát và một hóa đơn điện giảm nhiều cho người sử dụng, làm giảm năng lượng điện và nhu cầu năng lượng tại peaktimes cho đất nước, và khí gây hiệu ứng nhà kính thấp hơn và lượng khí thải CFC / HFC cho tất cả chúng ta. Sổ tay này được thiết kế cho những người không biết bay hơi làm mát, | 6 Evaporative Air-Conditioning Applications for Environmentally Friendly Cooling Table 1.1. Vapor-Compression versus Evaporative Air-Conditioning Basic characteristics Vapor compression AC Evaporative AC Coolant CFCs HFCs Water Production residential coolers Small and large scale Small and large scale Sensitivity to humidity for comfort cooling applications Applicable in all climate types Applicable in dry hot climates for comfort cooling Ventilation indoor air quality 20 outside air 100 outside air Energy use in a typical residential air conditioner for a 100 m3 room. 1 000 kWh yr 350 kWh yr Investment for a residential cooler Developed country US 1 000-1 600 Less developed country US 6004 400 Developed country US 200-700 Less developed country US 60-300 Maintenance Change filters every 2 years Annual pad change for aspen sump coat every 2 years Annual accumulated costs In USA US 500 In USA US 170 including power maintenance depreciation In India US 500 In India US 37 Source Authors. Some options expanding and realizing the benefits of EAC are noted below Low energy use solar. Small E AC units using solar photovoltaics PV are available in several commercial and prototype models. Manufacture and dissemination could be done through commercial channels providing cost-efficient cooling in grid-and non-grid settings. Transfer of technology. EAC technologies are a fertile field for South-South transfer of technology in particular with regard to small residential coolers and some agricultural applications. Support possibilities. EAC has substantial applicability as a demand-side management tool in government offices and schools. Technical assistance to developing countries pilot programs and demonstrations all may provide further opportunities for EAC. Introduction 7 Figure 1.3. Direct Evaporative Air-Conditioner for Transport Use Note The E AC unit on the forklift at right was built by Climatran and is being installed onto a city transit bus in Denver Colorado. More .