lications.
PERFORMANCE
CONCLUSION
In conclusion, it is necessary to evaluate the following factors when considering a geothermal/absorption cooling application for space conditioning.
Resource temperature
Substantial derating factors must be applied to equipment at temperatures less than 220°F. Very high resource temperatures or two-stage are required for low-temperature refrigeration.
Absorption machine hot water requirements compared to space heating flow requirements
Incremental well and pumping costs should be applied to the absorption machine.
Refrigeration capacity required
Larger machines have lower incremental capital costs on a $/ton basis. Coupled with the larger displaced energy, this result in a more positive economic picture.
Annual cooling load for space conditioning, in full load hours or for process cooling, in terms of load factor
Obviously higher utilization of the equipment results in more rapid payout.
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Pumping power for resources with unusually low static water levels or drawdowns
Pumping power may approach 50% of high efficiency electric chiller consumption.
Utility rates
As with any conservation project, high utility rates for both consumption and demand result in better system economics.
