Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/3363
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dc.contributor.authorFlorides, Georgios A.-
dc.contributor.authorLazari, Lazaros-
dc.contributor.authorChristodoulides, Paul-
dc.contributor.authorMessaritis, Vassilios-
dc.contributor.authorTheofanous, Elisavet-
dc.contributor.otherΛαζαρή, Λάζαρος-
dc.contributor.otherΧριστοδουλίδης, Παύλος-
dc.contributor.otherΦλωρίδης, Γεώργιος Α.-
dc.contributor.otherΜεσσαρίτης, Βασίλειος-
dc.contributor.otherΘεοφάνους, Ελισάβετ-
dc.date.accessioned2014-03-12T10:24:34Z-
dc.date.accessioned2015-12-09T12:01:43Z-
dc.date.available2014-03-12T10:24:34Z-
dc.date.available2015-12-09T12:01:43Z-
dc.date.issued2013-
dc.identifier.citationTwenty-third (2013) International Offshore and Polar Engineering Anchorage, Alaska, USA, June 30–July 5, 2013en_US
dc.identifier.urihttp://ktisis.cut.ac.cy/handle/10488/3363-
dc.description.abstractHeat pumps (HP) attain higher efficiencies and save energy when they are coupled to ground heat exchangers (GHEs). For this reason we compare, by modeling, the efficiency of the vertical and horizontal GHEs which are two basic types. The modeling of the vertical heat exchanger is represented by two tube lines of 100 m in length, embedded in four different types of ground with an additional bottom base. The horizontal heat exchanger consists of four tube lines, 50 m in length each, embedded in three ground layers. The simulation results of the vertical GHE are validated by comparison to a measured set of data showing very good agreement. Further simulations with the vertical GHE show, as expected, that when the initial ground temperature rises the mean temperature of the heat exchanger fluid increases as well in a linear relationship. For a 50-hour continuous operation, the inlet and outlet fluid temperatures are computed for certain ground temperatures. Comparisons between the horizontal and vertical GHEs reveal that under the same operating conditions and center-to-center distances of the tubes, the vertical heat exchanger keeps a much lower mean GHE show, as expected, that when the initial ground temperature rises the mean temperature of the heat exchanger fluid increases as well in a linear relationship. For a 50-hour continuous operation, the inlet and outlet fluid temperatures are computed for certain ground temperatures. Comparisons between the horizontal and vertical GHEs reveal that under the same operating conditions and center-to-center distances of the tubes, the vertical heat exchanger keeps a much lower meanGHE show, as expected, that when the initial ground temperature rises the mean temperature of the heat exchanger fluid increases as well in a linear relationship. For a 50-hour continuous operation, the inlet and outlet fluid temperatures are computed for certain ground temperatures. Comparisons between the horizontal and vertical GHEs reveal that under the same operating conditions and center-to-center distances of the tubes, the vertical heat exchanger keeps a much lower mean temperature because the initial ground temperature at the buried tube depth is always higher than that of the vertical GHE. Because of this observation one would assume that the vertical GHE is more efficient than the horizontal. Instead, in a proper design, one could increase the distance between the tube centres and in this way decrease the mean temperature of the tube fluid. Simulations, for a 50-hour continuous temperature because the initial ground temperature at the buried tube depth is always higher than that of the vertical GHE. Because of this observation one would assume that the vertical GHE is more efficient than the horizontal. Instead, in a proper design, one could increase the distance between the tube centres and in this way decrease the mean temperature of the tube fluid. Simulations, for a 50-hour continuous temperature because the initial ground temperature at the buried tube depth is always higher than that of the vertical GHE. Because of this observation one would assume that the vertical GHE is more efficient than the horizontal. Instead, in a proper design, one could increase the distance between the tube centres and in this way decrease the mean temperature of the tube fluid. Simulations, for a 50-hour continuous operation and 24°C initial ground temperature, show that the mean operation and 24°C initial ground temperature, show that the mean fluid temperature can stay below that of the vertical GHE if the center-to-center distance of the tubes increases to 1 .en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.publishere International Society of Offshore and Polar Engineers (ISOPE)en
dc.rightsCopyright © 2013 by the International Society of Offshore and Polar Engineers (ISOPE)en_US
dc.subjectEarth heat exchangersen_US
dc.subjectGround thermal propertiesen_US
dc.subjectModelingen_US
dc.subjectConvection-diffusion equationen_US
dc.titleModeling of Geothermal Heat Exchangersen_US
dc.typeConference Papersen_US
dc.linkhttp://www.isope.org/publications/proceedings/ISOPE/ISOPE%202013/index.htmen_US
dc.collaborationCyprus University of Technologyen_US
dc.subject.categoryElectrical Engineering - Electronic Engineering - Information Engineeringen_US
dc.countryCyprusen_US
dc.subject.fieldEngineering and Technologyen_US
dc.relation.conferenceTwenty-third International Offshore and Polar Engineering Anchorageen_US
dc.dept.handle123456789/134en
cut.common.academicyear2012-2013en_US
item.grantfulltextnone-
item.fulltextNo Fulltext-
item.languageiso639-1other-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.deptDepartment of Electrical Engineering, Computer Engineering and Informatics-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.orcid0000-0001-9079-1907-
crisitem.author.orcid0000-0002-2229-8798-
crisitem.author.parentorgFaculty of Engineering and Technology-
crisitem.author.parentorgFaculty of Engineering and Technology-
crisitem.author.parentorgFaculty of Engineering and Technology-
crisitem.author.parentorgFaculty of Engineering and Technology-
crisitem.author.parentorgFaculty of Engineering and Technology-
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers
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