The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of ENERGY and ENVIRONMENT
Transactions ID Number: 20-248
Full Name: Ioan Sârbu
Position: Professor
Age: ON
Sex: Male
Address: Piata Bisericii, no. 4A, ap.3, 300233 Timisoara
Country: ROMANIA
Tel: 0040256403992
Tel prefix: 0040
Fax: 0040256403987
E-mail address: ioan.sarbu@ct.upt.ro
Other E-mails: ioan_sarbu@yahoo.com
Title of the Paper: Thermal tests on borehole heat exchangers for ground–coupled heat pump systems
Authors as they appear in the Paper: Ioan Sârbu, Horia Bura
Email addresses of all the authors: ioan.sarbu@ct.upt.ro, horiabura@gmail.com
Number of paper pages: 9
Abstract: The mechanical vapor compression heat pumps are modern systems, recently used as an alternative to the thermal fossil fuel stations. The incorrect determination of the vaporization ther-mal power needed for the ground–coupled heat pumps with vertical closed–loops leads to unfavorable effects for this systems: under–sizing the catching system used for the vaporization of the refri-gerant determines the reduction of heat pump nominal thermal power; over–sizing catching system leads to additional investments that puts under discussion the opportunity of using such systems. Therefore is very important to know the thermal conductivity of the soil and the thermal resistance of the vertical ground loop for esta-blish the right number of loops to be realized, depending on energy to be transfered to the heat pump. For this purpose is needed to be made a ground thermal response test, using a prove borehole. In this paper is presented a working methodology and is developed an!
ana-lytical model for evaluation of the soil thermal conductivity and the borehole thermal resistance, based on which can be calculated the vaporization thermal power that has to be assured from the ground and also the length of the vertical loops. Also, this paper presents an equivalent–time method to remove the effects of the interruption and estimate soil thermal conductivity, along with borehole resistance.
Keywords: Heat pumps, Ground–source, Vertical loops, Vaporization thermal power, Thermal response test, Equivalent–time concept.
EXTENSION of the file: .pdf
Special (Invited) Session: Vaporization thermal power assurance for vertical closed-loop ground-coupled heat pump systems
Organizer of the Session: 657-184
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