FIGURE 6.22 Basic principle of the absorption air-conditioning system.
Absorption refrigeration systems are based on extensive development and experience in the early years of the refrigeration industry, in particular for ice production. From the beginning, its development has been linked to periods of high energy prices. Recently, however, there has been a great resurgence of interest in this technology not only because of the rise in the energy prices but mainly due to the social and scientific awareness about the environmental degradation, which is related to the energy generation.
The pressurization is achieved by dissolving the refrigerant in the absorbent, in the absorber section (Figure 6.22). Subsequently, the solution is pumped to a high pressure with an ordinary liquid pump. The addition of heat in the generator is used to separate the low-boiling refrigerant from the solution. In this way, the refrigerant vapor is compressed without the need for large amounts of mechanical energy that the vapor compression air-conditioning systems demand.
The remainder of the system consists of a condenser, expansion valve, and evaporator, which function in a similar way as in a vapor compression air-conditioning system.
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Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.