A Proposition for Solar Collector Incorporation in an Office Size Vapor Absorption Air Conditioning System with Low Electricity Consumption

Mahmmod Aziz Muhammed Al-Saiydee, Ali Taha Mohammed


A water vapor absorption air-conditioning system is proposed for installation at residential buildings and offices within the extreme weather of Iraq. The hot water required for evaporating water content of LiBr solution is supplied by a series of flat plate and concentrated solar collectors with a basic design that is expected to raise the temperature of water to the required value. Space saving and cost reduction are considered; therefore, the system can be easily manufactured and installed. Theoretical calculations and recommended data for design are given, and compared with a similar existing system. The proposed system is expected to run and deliver the required cooling capacity at relatively low electricity consumption, less than 1,500 W. The cost of manufacturing is also low since simple and cheap components are involved, for instance, a conventional air cooler is proposed as a substitution for a cooling tower. Although the expected coefficient of performance for the system is low compared to the available vapor compression system (about 0.3), the free of charge solar heat source turns it in more cost-effective unit regarding the increasing electricity consumption of conventional air conditioners and shortage in electricity supply hours, especially in Iraq.


Keywords: air conditioning system, lithium bromide, solar collector, coefficient of performance, electricity consumption.

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