In-field performance analysis of ground source cooling system with horizontal ground heat exchanger in Tunisia

Naili, Nabiha; Hazami, Majdi; Attar, I.; Farhat, Abdelhamid

doi:10.1016/j.energy.2013.08.054

Cited by 56 publications

(17 citation statements)

References 42 publications

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“…Furthermore, there is only one commercial design program which is called GLD (ground loop design) for the horizontal-type GHEs in contrast with many design program for the vertical-type GHEs [17,18]. Even so, the use of horizontal GHEs can reduce installation cost and minimize the compromise between increase in efficiency and cost [19][20][21]. Horizontal GHEs are usually installed in a trench approximately 1.5-3 m deep, and their thermal efficiency is affected by pipe configuration, type of pipe, trench depth and ground thermal properties [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of thermal efficiency in different types of horizontal ground heat exchangers

Yoon

Lee

2015

Energy and Buildings

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Section: Introductionmentioning

confidence: 99%

Evaluation of thermal efficiency in different types of horizontal ground heat exchangers

Yoon

Lee

2015

Energy and Buildings

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“…GUM has been used to quantify uncertainties for various GSHP configurations and operation strategies. Notable studies include uncertainty analysis of the thermodynamic performance of a GSHP [2,3], uncertainty in performance of a hybrid GSHP combined with a solar thermal collector [4], and uncertainty in evaluating the energy balance of a GSHP's load and source sides [5].…”

Section: Introductionmentioning

confidence: 99%

Bayesian inference of structural error in inverse models of thermal response tests

et al. 2018

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For the design of ground-source heat pumps (GSHPs), two design parameters, namely the ground thermal conductivity and borehole thermal resistance are estimated by interpreting thermal response test (TRT) data using a physical model. In most cases, the parameters are fitted to the measured data assuming that the chosen model can fully reproduce the actual physical response. However, two significant sources of error make the estimation uncertain: random error from experiments and structural bias error that describes the discrepancy between the model and actual physical phenomena. Generally, these two error sources are not evaluated separately. As a result, the suitability of selected models to correctly infer parameters from TRTs are not well understood. In this study, the Bayesian calibration framework proposed by Kennedy and O'Hagan is employed to estimate the GSHP design parameters and quantify the random and structural errors in the inference. The calibration framework enables us to examine structural errors in the commonly used infinite line source model arising due to the conditions in which the TRT takes place. Two in situ TRT datasets were used: TRT1, influenced by contextual disturbances from the outdoor environment, and TRT2, influenced by a strong groundwater flow caused by heavy rainfall. We show that the Bayesian calibration framework is able to quantify the structural errors in the TRT interpretation and therefore can yield more accurate estimates of design parameters with full quantification of uncertainties.

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“…The method to simulate groundwater flow and heat transfer in complex hydrogeological conditions for standing column well (SCW) system, pumping and injecting groundwater in single borehole among ground source heat pump (GSHP) systems was presented [11]. In addition, performance analysis of GSCS with horizontal GHE conducted by Naili et al [12] in Tunisia and showed that the utilization of the GSCS is appropriated for cooling building in Tunisia, which is characterized by a hot climate.…”

Section: Introductionmentioning

confidence: 99%

Development of an open-loop ground source cooling system for space air conditioning system in hot climate like Indonesia

Jalaluddin

Miyara

Ishikawa³

et al. 2018

MATEC Web Conf.

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Ground source cooling system (GSCS) is promising technology to serve cooling demands of buildings. This study presents a development of an open-loop GSCS for space air conditioning at Hasanuddin University Gowa campus. Experimental study was carried-out by pumping water from well of 57 m depth and flowing the water over a heat exchanger to cool refrigerant of air conditioning (AC) unit. The performance of AC unit was investigated under actual operation with various water flowrates. The temperatures of inlet and outlet water in the heat exchanger were also measured. The system operated from 11:00 until 18:00 o'clock local time with 3 (three) flowrates such as 3.6; 6.5 and 14.3 L/min respectively. In the low flowrate, the temperature of outlet water is approximately 37 o C. However, the compressor power is also increase significantly. The coefficient of performances (COPs) of the system in average are 2.9 in the low flowrate and 3.4 in the high flowrate. Also. the result shows that the utilization of GSCS is appropriated for cooling buildings in the hot climate like Indonesia.

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In-field performance analysis of ground source cooling system with horizontal ground heat exchanger in Tunisia

Cited by 56 publications

References 42 publications

Evaluation of thermal efficiency in different types of horizontal ground heat exchangers

Evaluation of thermal efficiency in different types of horizontal ground heat exchangers

Bayesian inference of structural error in inverse models of thermal response tests

Development of an open-loop ground source cooling system for space air conditioning system in hot climate like Indonesia

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