Sökning: id:"swepub:oai:DiVA.org:kth-73091" >
Distributed Thermal...
Distributed Thermal Response Tests on a Multi-pipe Coaxial Borehole Heat Exchanger
-
- Acuña, José, 1982- (författare)
- KTH,Tillämpad termodynamik och kylteknik
-
Mogensen, Palne (författare)
-
- Palm, Björn (författare)
- KTH,Tillämpad termodynamik och kylteknik
-
(creator_code:org_t)
- London : Taylor & Francis, 2011
- 2011
- Engelska.
-
Ingår i: HVAC & R RESEARCH. - London : Taylor & Francis. - 1078-9669 .- 1938-5587. ; 17:6, s. 1012-1029
- Relaterad länk:
-
https://www.tandfonl...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- In a distributed thermal response test, distributed temperature measurements are taken along a borehole heat exchanger during thermal response tests, allowing the determination of local ground thermal conductivities and borehole thermal resistances. In this article, the first results from six heat injection distributed thermal response tests carried out on a new, thermally insulated leg type, multi-pipe coaxial borehole heat exchanger are presented. The borehole heat exchanger consists of 1 insulated central and 12 peripheral pipes. Temperature measurements are carried out using fiber-optic cables placed inside the borehole heat exchanger pipes. Unique temperature and thermal power profiles along the borehole depth as a function of the flow rate and the total thermal power injected into the borehole are presented. A line source model is used for simulating the borehole heat exchanger thermal response and determining local variations of the ground thermal conductivity and borehole thermal resistance. The flow regime in the peripheral pipes is laminar during all distributed thermal response tests and average thermal resistances remain relatively constant, independently of the volumetric flow rate, being lower than those corresponding to U-pipe borehole heat exchangers. The thermal insulation of the central pipe significantly reduces the thermal shunt to the peripheral pipes even at low volumetric flow rates.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Nyckelord
- Ground Source Heat Pump
- Borehole Heat Exchanger
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas