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Performance and Economic Modeling of Horizontally Drilled Ground-Source Heat Pumps in Select California Climates.

紀錄類型:	書目-電子資源 : Monograph/item
書名/作者:	Performance and Economic Modeling of Horizontally Drilled Ground-Source Heat Pumps in Select California Climates.
作者:	Wiryadinata, Steven.
出版者:	Ann Arbor : : ProQuest Dissertations & Theses, , 2015
面頁冊數:	139 p.
附註:	Source: Masters Abstracts International, Volume: 55-01.
Contained By:	Masters Abstracts International55-01(E).
標題:	Energy.
標題:	Engineering.
ISBN:	9781339066806
摘要、提要註:	Service life modeling was performed to gage the viability of unitary 3.5 kWt, ground-source terminal heat pumps (GTHP) employing horizontal directionally drilled geothermal heat exchangers (GHX) over air-source terminal heat pumps (PTHP) in hotels and motels and residential apartment building sectors in California's coastal and inland climates. Results suggest the GTHP can reduce hourly peak demand for the utility by 7%-25% compared to PTHP, depending on the climate and building type. The annual energy savings, which range from -1% to 5%, are highly dependent on the GTHP pump energy use relative to the energy savings attributed to the difference in ground and air temperatures (DeltaT). In mild climates with small ?T, the pump energy use may overcome any advantage to utilizing a GHX. The majority of total levelized cost savings -- ranging from $0.18/ft2 to $0.3/ft 2 - are due to reduced maintenance and lifetime capital cost normally associated with geothermal heat pump systems. Without these reductions (not validated for the GTHP system studied), the GTHP technology does not appear to offer significant advantages over PTHP in the climate zones studied here. The GTHP levelized cost was most sensitive to variations in installed cost and in some cases, energy use (influenced by climate zone choice), which together highlights the importance of climate selection for installation, and the need for larger market penetration of ground-source systems in order to bring down installed costs as the technology matures.

Performance and Economic Modeling of Horizontally Drilled Ground-Source Heat Pumps in Select California Climates.
Wiryadinata, Steven.

Performance and Economic Modeling of Horizontally Drilled Ground-Source Heat Pumps in Select California Climates. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 139 p.

Source: Masters Abstracts International, Volume: 55-01.

Thesis (M.S.)--University of California, Davis, 2015.

Service life modeling was performed to gage the viability of unitary 3.5 kWt, ground-source terminal heat pumps (GTHP) employing horizontal directionally drilled geothermal heat exchangers (GHX) over air-source terminal heat pumps (PTHP) in hotels and motels and residential apartment building sectors in California's coastal and inland climates. Results suggest the GTHP can reduce hourly peak demand for the utility by 7%-25% compared to PTHP, depending on the climate and building type. The annual energy savings, which range from -1% to 5%, are highly dependent on the GTHP pump energy use relative to the energy savings attributed to the difference in ground and air temperatures (DeltaT). In mild climates with small ?T, the pump energy use may overcome any advantage to utilizing a GHX. The majority of total levelized cost savings -- ranging from $0.18/ft2 to $0.3/ft 2 - are due to reduced maintenance and lifetime capital cost normally associated with geothermal heat pump systems. Without these reductions (not validated for the GTHP system studied), the GTHP technology does not appear to offer significant advantages over PTHP in the climate zones studied here. The GTHP levelized cost was most sensitive to variations in installed cost and in some cases, energy use (influenced by climate zone choice), which together highlights the importance of climate selection for installation, and the need for larger market penetration of ground-source systems in order to bring down installed costs as the technology matures.

ISBN: 9781339066806Subjects--Topical Terms:

422946
Energy.

Performance and Economic Modeling of Horizontally Drilled Ground-Source Heat Pumps in Select California Climates.
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