The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON HEAT AND MASS TRANSFER
Transactions ID Number: 28-353
Full Name: László Garbai
Position: Professor
Age: ON
Sex: Male
Address: Budapest, Műegyetem rakpart 9
Country: HUNGARY
Tel: +3614632405
Tel prefix:
Fax:
E-mail address: sz.mehes@gmail.com
Other E-mails: tanszek@epgep.bme.hu
Title of the Paper: Heat capacity of vertical ground heat exchangers with single U-tube installation in the function of time
Authors as they appear in the Paper: László Garbai, Szabolcs Méhes
Email addresses of all the authors: sz.mehes@gmail.com,tanszek@epgep.bme.hu
Number of paper pages: 10
Abstract: One of the major problems of ensuring optimal working of ground source heat pump systems is a heat transfer around vertical ground heat exchanger. The working of vertical U-tube can be understood as a heat exchanger between the ground and the heat carrying medium. In our case this heat carrying medium is fluid, which transfers the extracted heat from the ground to the heat pump. In winter we extract heat from the ground and in summer we transfer heat to the ground. In our paper we propose a simple calculation model to calculate the temperature change and the thermal resistance in vertical ground heat exchangers with single U-tube installation. We made calculations to obtain the amount of extractable heat from the U-tube in the function of different mass flow. We did these calculations for several periods of time, 1 day, 1 year, 10 years. We found that the amount of extractable heat in winter and in summer is between 10 – 80 % in the function of mass flow, and with!
elapsing time its values decline.
Keywords: Heat Pump, U-tube, Heat Transfer, Heat Flow, Thermal Resistance, System Theory.
EXTENSION of the file: .pdf
Special (Invited) Session: Modelling of the temperature change in vertical ground heat exchangers with single U-tube installation
Organizer of the Session: 595-530
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