Development of a Ground Source Heat Pump System with Ground Heat Exchanger Utilizing the Cast-in-place Concrete Pile Foundations of Buildings
نویسنده
چکیده
Ground-source heat pump (GSHP) systems can achieve a higher coefficient of performance than conventional airsource heat pump (ASHP) systems because the ground, which functions as the heat source or sink, is at a higher temperature in winter and lower in summer than the air temperature (Kavanaugh 1992; Kavanaugh et al 1997). In addition, there will likely be some mitigation against the effects of the heat island phenomena, as this system does not emit exhaust heat into the atmosphere during air conditioning. However, GSHP systems are not popular except as experimental versions in Japan. This is primarily due to the high cost of boring to run piping underground. For example, such boring costs average about ¥3,000/m (approx. US$30/m) in the USA, whereas the same work is about ¥10,000/m (US$100/m) in Japan.
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