A two-region simulation model of vertical U-tube ground heat exchanger and its experimental verification

Yang, Weibo; Shi, Mingheng; Liu, Guangyuan; Chen, Zhenqian

doi:10.1016/j.apenergy.2008.11.008

Cited by 127 publications

(41 citation statements)

References 6 publications

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“…This deterioration in fit is surprising as superposition of thermal power is a well-established technique for the analysis of analysis of ground heat exchangers and has been used in the successful back analysis of field data on a number of previous occasions (e.g. [47,48]). This will be discussed further in Section 6.2.…”

Section: All Test Stagesmentioning

confidence: 99%

Comparison of two different models for pile thermal response test interpretation

2014

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Section: All Test Stagesmentioning

confidence: 99%

Comparison of two different models for pile thermal response test interpretation

2014

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“…This assumption ignores the drop in heat injection strength when the borehole wall temperature increases and, therefore, underestimates the inlet temperature of the circulating fluid that is required to meet the heat injection needs of the system. Yang et al [56] propose and develop an updated two-region vertical U-tube GHE analytical model coupling two solutions for inside and outside the borehole with transient temperature of borehole wall. In the fewer cases of multiple boreholes, superposition of the temperature excesses resulted from individual boreholes seems to be the most popular solution in analytical approaches.…”

Section: Some Modeling Limitationsmentioning

confidence: 99%

A Review of the Modelling of Thermally Interacting Multiple Boreholes

Koohi-Fayegh

Rosen

2013

Sustainability

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Much attention is now focused on utilizing ground heat pumps for heating and cooling buildings, as well as water heating, refrigeration and other thermal tasks. Modeling such systems is important for understanding, designing and optimizing their performance and characteristics. Several heat transfer models exist for ground heat exchangers. In this review article, challenges of modelling heat transfer in vertical heat exchangers are described, some analytical and numerical models are reviewed and compared, recent related developments are described and the importance of modelling these systems is discussed from a variety of aspects, such as sustainability of geothermal systems or their potential impacts on the ecosystems nearby.

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“…Other numerical models have been developed in the recent years, 4 adopting different approaches [24,25,26,27]. Usually, they can only be used for long-term calculations.…”

Section: Introductionmentioning

confidence: 99%

Coupling short-term (B2G model) and long-term (g-function) models for ground source heat exchanger simulation in TRNSYS. Application in a real installation

Ruiz-Calvo

Роса

Monzó

et al. 2016

Applied Thermal Engineering

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Coupling short-term (B2G model) and long-term (g-function) models for ground source heat exchanger simulation in TRNSYS. Application in a real installation.. Applied Thermal Engineering AbstractGround-source heat pump (GSHP) systems represent one of the most promising techniques for heating and cooling in buildings. These systems use the ground as a heat source/sink, allowing a better efficiency thanks to the low variations of the ground temperature along the seasons. The ground-source heat exchanger (GSHE) then becomes a key component for optimizing the overall performance of the system. Moreover, the short-term response related to the dynamic behaviour of the GSHE is a crucial aspect, especially from a regulation criteria perspective in on/off controlled GSHP systems. In this context, a novel numerical GSHE model has been developed at the Instituto de Ingeniería Energética, Universitat Politècnica de València. Based on the decoupling of the short-term and the longterm response of the GSHE, the novel model allows the use of faster and more precise models on both sides. In particular, the short-term model considered is the B2G model, developed and validated in previous research works conducted at the Instituto de Ingeniería Energética. For the long-term, the g-function model was selected, since it is a previously validated and widely used model, and presents some interesting features that are useful for its combination with the B2G model. The aim of the present paper is to describe the procedure of combining these two models in order to obtain a unique complete GSHE model for both short-and long-term simulation. The resulting model is then validated against experimental data from a real GSHP installation.

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A two-region simulation model of vertical U-tube ground heat exchanger and its experimental verification

Cited by 127 publications

References 6 publications

Comparison of two different models for pile thermal response test interpretation

Comparison of two different models for pile thermal response test interpretation

A Review of the Modelling of Thermally Interacting Multiple Boreholes

Coupling short-term (B2G model) and long-term (g-function) models for ground source heat exchanger simulation in TRNSYS. Application in a real installation

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