Measurement and modelling of the ground temperature profile in Zarqa, Jordan for geothermal heat pump applications

Al‐Hinti, I.; Almuhtady, Ahmad; Al‐Kouz, Wael

doi:10.1016/j.applthermaleng.2017.05.107

Cited by 30 publications

(13 citation statements)

References 17 publications

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“…The soil temperature a few meters below the ground surface stabilizes at the same value around the year. Al‐Hiniti et al experimentally studied the ground temperature in Zarqa, Jordan . They mentioned that the soil temperature stabilizes throughout the year at around 21°C at depths of 5 m or more.…”

Section: Resultsmentioning

confidence: 99%

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A novel PVT/PTC/ORC solar power system with PV totally immersed in transparent organic fluid

Al‐Nimr

Al‐Ammari

2019

Int J Energy Res

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Summary A novel hybrid PVT/parabolic trough concentrator (PTC)/organic Rankine cycle (ORC) solar power system integrated with underground heat exchanger has been proposed. The evaporator unit consists of a transparent flat PVT solar collector and a PTC connected in series. The first transparent solar collector has transparent covers and consists of solar cells totally immersed within a pressurized transparent organic fluid that allows the solar radiation to reach the solar cells, cools them effectively, and captures all thermal losses from the solar cells. The second concentrator is a conventional one with opaque black receiver used to reheat the transparent organic fluid to higher temperatures. Both solar collectors (the PVT and PTC) perform as the boiler and superheater for the ORC. The performance of the proposed system is investigated by a steady‐state mathematical model. The results show that, at design conditions, the efficiency of the PV modules stabilizes around 12%, absorber efficiency varies within 64% to 75%, and the ORC efficiency varies within 7% to 17%.

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Section: Resultsmentioning

confidence: 99%

“…Al-Hiniti et al experimentally studied the ground temperature in Zarqa, Jordan. 53 They mentioned that the soil temperature stabilizes throughout the year at around 21°C at depths of 5 m or more. In this study, the soil temperature fixed at 20°C.…”

Section: Condenser Performancementioning

confidence: 99%

A novel PVT/PTC/ORC solar power system with PV totally immersed in transparent organic fluid

Al‐Nimr

Al‐Ammari

2019

Int J Energy Res

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“…previously (Al-Hinti et al, 2017;Popiel and Wojtkowiak, 2013). Hence, the assumption that the vertical profile of temperature within the ground at low depths follows approximatively the same behavior as the atmospheric temperature profile can be established, and therefore the approach adopted for the atmospheric heat exchange term (c.f.…”

Section: A13 Ground Heat Exchange Termmentioning

confidence: 99%

Estimation of the terms acting on local surface one-hour temperature variations in Paris region: the specific contribution of clouds

Rojas

Chiriaco

Ringard

2021

Preprint

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Abstract. Local temperature variations at the surface are mainly dominated by small-scale processes coupled through the surface energy budget terms, which depend mostly on radiation availability and thus cloud processes. A method to determine each of these terms based almost exclusively on observations is presented in this paper, with the main objective to estimate their importance in hourly surface temperature variations at the SIRTA observatory, near Paris. Almost all terms are estimated from the multi-year dataset SIRTA-ReOBS, following a few parametrizations. The four main terms acting on temperature variations are radiative forcing (separated into clear-sky and cloud radiation), atmospheric heat exchange, ground heat exchange, and advection. Compared to direct measurements of hourly temperature variations, it is shown that the sum of the four terms gives a good estimate of the hourly temperature variations, allowing a better assessment of the contribution of each term to the variation, with an accurate diurnal and annual cycles representation, especially for the radiative terms. A random forest analysis shows that whatever the season, clouds are the main modulator of the clear sky radiation for 1-hour temperature variations during the day, and mainly drive these 1-hour temperature variations during the night. Then, the specific role of clouds is analyzed exclusively in cloudy conditions considering the behavior of some classical meteorological variables along with lidar profiles. Cloud radiative effect in shortwave and longwave and lidar profiles show a consistent seasonality during the daytime, with a dominance of mid- and high-level clouds detected at the SIRTA observatory, which also affects surface temperatures and upward sensible heat flux. During the nighttime, despite cloudy conditions and having a strong cloud longwave radiative effect, temperatures are the lowest and are therefore mostly controlled by larger-scale processes at this time.

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“…For analytical solutions, transient 1D heat conduction equation was strongly used [4,[15][16][17][18][19][20] In modelling ground thermal distribution, several authors were interested in finding relation between ambient air and undisturbed soil temperatures [21]. Some other were interested about predicting soil temperature with less input [10,17].…”

Section: Introductionmentioning

confidence: 99%

“…Some else, highlighted the geology of multilayer in ground and the different effect of thermal properties [11]. Also, several studies have taken the climatic conditions into account (inland, south-Mediterranean, central and northern Europe, variable, humid continental, moderate, arid, domestic, moderate and arid climates) [5,7,10,12,14,15,17,18,20].…”

Section: Introductionmentioning

confidence: 99%

Comparison Study Between Using Air Data And Soil Data In Predicting Soil Temperature

Hamdane¹,

Silva²,

Pires³

et al. 2021

14th WCCM-ECCOMAS Congress

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soil in shallow depths could be used as heat sink / heat source for cooling / heating devices. To predict its thermal behaviour during year, some authors use data from soil temperature records some else use data from average yearly air temperature measurements of meteorologic stations to avoid measure soil temperature in shallow depths for long time. In this research paper, we present a comparison study about the use of soil data and the use of air data for soil temperature prediction, where transient heat conduction in semi-infinite solids is utilised in the study. We measured the soil temperature of three sites for three years in Covilha-Portugal to support the current study. Later, we create reference years of soil temperature in the three sites.

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Measurement and modelling of the ground temperature profile in Zarqa, Jordan for geothermal heat pump applications

Cited by 30 publications

References 17 publications

A novel PVT/PTC/ORC solar power system with PV totally immersed in transparent organic fluid

A novel PVT/PTC/ORC solar power system with PV totally immersed in transparent organic fluid

Estimation of the terms acting on local surface one-hour temperature variations in Paris region: the specific contribution of clouds

Comparison Study Between Using Air Data And Soil Data In Predicting Soil Temperature

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