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citations
Cited by 31 publications
(12 citation statements)
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References 21 publications
(27 reference statements)
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“…The total heat exchange rate of cases with long pitch interval was 10-40% lower than those with short pitch intervals cases with short pitch interval. It can be inferred that use of small intervals between coils increases interference in heat transfer and leads to small heat exchange rates per pipe length [26]. For the Utype GHE, the total heat-exchange rate was the lowest among the three GHEs, but the heat exchange rate per pipe length was higher than for any other types.…”
Section: Resultsmentioning
confidence: 91%
See 1 more Smart Citation
“…The total heat exchange rate of cases with long pitch interval was 10-40% lower than those with short pitch intervals cases with short pitch interval. It can be inferred that use of small intervals between coils increases interference in heat transfer and leads to small heat exchange rates per pipe length [26]. For the Utype GHE, the total heat-exchange rate was the lowest among the three GHEs, but the heat exchange rate per pipe length was higher than for any other types.…”
Section: Resultsmentioning
confidence: 91%
“…Their calculation suggested the thermal superiority of spiral-coiltype GHE in comparison with line and slinky type GHEs. Li et al [26] considered thermal performance of spiral-coil-type GHE under the existence of the groundwater flow effect. However, there are a few researches for thermal efficiency evaluation among different kinds of horizontal GHEs with experimental results, and a few researches for relation between cost analysis and thermal efficiency results.…”
Section: Introductionmentioning
confidence: 99%
“…The results showed that the heat exchange rate per unit land area is obviously improved by using double-layer horizontal GHEs. The optimum depth of the upper layer GHE was 1.5 m when the lower layer was located at 2.0 m. Li et al [24] proposed a moving ring source model to investigate the thermal performance of a spiral GHE under groundwater flow. The experiments were also carried out to test the soil temperature variations of two different spiral GHE layouts with different groundwater velocities.…”
Section: Introductionmentioning
confidence: 99%
“…Standard models and calculation methods [10,11], new methodologies that take into account the thermal comfort [12,13], and experimental evaluation of case studies [14] are available. With regard to the ground simulation block, recently theoretical and numerical models have been developed for both the vertical borehole [15][16][17] and the horizontal loop/slinky [18,19] heat exchangers. However, the heat pump block has not been accurately addressed.…”
Section: Introductionmentioning
confidence: 99%