geothermal heat store in unsaturated/saturated soil charged from a solar heating system
نویسندگان
چکیده
an investigation on the thermal performance of the soil as geothermal heat energy storage medium has been conducted. the thermal characteristics of the soil storage and the heat transfer from a heat exchanger in the soil, surrounding and bottom surface will be discussed. this investigation forms a contribution to a project to realize such storage to be charged from a solar heating system. this system serves as a district heating system which is capable of storing sun radiation energy and discharged at a required time upon order. the solar energy system delivers a substantial amount of the daily periodical demand for space heating and also may be used for domestic hot water or any other purpose. during sunny days the surplus of heat coming from the solar collectors is flowing through a water circulator network towards the reservoir. during cloudy days or knights the heat withdrawn from the reservoir to meet the heat demand of the dwellings is flowing towards the dwellings and transferred through backward water circulator network to heat up the surface heat producer. the investigated reservoir is a rectangular part of the soil which acts as the storage volume for sensible heat.). as a result the soil in such a reservoir may be saturated with water. density differences of the groundwater will circulated when heat is introduced into the soil. natural convection (free convection) then might develop.
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عنوان ژورنال:
international journal of geo science and environmental planningجلد ۱، شماره ۲، صفحات ۱-۱۰
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