| Summary: | 博士 === 國立臺灣科技大學 === 營建工程系 === 100 === Urban heat-island effect is the most deeply concerned issues and getting worse in Taipei urban. The heat accumulating effect is also more significant due to its basin topography. The exhausted heat to air from cooling towers that air-conditioner systems using for cooling down indoor temperature also causes surrounding temperature increasing. To reduce the amount of the mentioned heat to the air, this research adopts circulating groundwater as an alternative cooling medium for the air-conditioner. The groundwater reservoir in the Chingmei gravel stratum of Taipei basin is plenty, flowing, and with low-temperature. Deep wells installed for pumping out high groundwater pressure head to reduce uplift force in excavation engineering are very suitable to be utilized here. From the numerical simulation of the aquifer combing hydrogeology, groundwater hydraulic mechanics, heat transferring, the groundwater is flowing with a slow speed. That can dissipate the heat generated by air-conditioning of a MRT station. In-situ tests in a MRT site were performed to calibrate the numerical model and estimate the ability of pumping, recharging, and heat transferring of the aquifer. Furthermore, the electricity consumption of the air-conditioner and pump were determined by a series in-situ tests in NTUST. The test results were adopted to perform the optimization of designing the plate heat exchanger to save the electricity consumption of entire air-conditioner system.
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