GEOTHERMAL TECHNOLOGIES LEGACY COLLECTION - Bibliographic Citation


Bibliographic Citation



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Title: Foundation heat exchangers for residential ground source heat pump systems Numerical modeling and experimental validation
Creator/Author: Xing, Lu [Oklahoma State University] ; Cullin, James [Oklahoma State University] ; Spitler, Jeffery [Oklahoma State University] ; Im, Piljae [ORNL] ; Fisher, Daniel [Oklahoma State University]
Publication Date:2011 Jan 01
OSTI Identifier:OSTI 1037688
Report Number(s):None
DOE Contract Number:DE-AC05-00OR22725
Document Type:Journal Article
Specific Type:
Coverage:
Resource Relation:Journal Name: HVAC & R Research; Journal Volume: 17; Journal Issue: 6
Other Number(s):
Research Org:Oak Ridge National Laboratory (ORNL); Building Technologies Research and Integration Center
Sponsoring Org:USDOE
Subject:15 GEOTHERMAL ENERGY; APPROXIMATIONS; BASEMENTS; EXCAVATION; FREEZING; GROUND SOURCE HEAT PUMPS; HEAT EXCHANGERS; MOISTURE; SEASONS; SHADING; SIMULATION; SOILS; VALIDATION
Keywords:
Description/Abstract:A new type of ground heat exchanger that utilizes the excavation often made for basements or foundations has been proposed as an alternative to conventional ground heat exchangers. This article describes a numerical model that can be used to size these foundation heat exchanger (FHX) systems. The numerical model is a two-dimensional finite-volume model that considers a wide variety of factors, such as soil freezing and evapotranspiration. The FHX numerical model is validated with one year of experimental data collected at an experimental house located near Oak Ridge, Tennessee. The model shows good agreement with the experimental data-heat pump entering fluid temperatures typically within 1 C (1.8 F) - with minor discrepancies due to approximations, such as constant moisture content throughout the year, uniform evapotranspiration over the seasons, and lack of ground shading in the model.
Publisher:
Country of Publication:US
Language:English
Size/Format:Medium: X; Size: 1059-1074
Rights:
Availability:
System Entry Date:2013 Jun 06
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