Development of the hybrid model for estimating the undisturbed ground temperature using the finite element method and geostatistical technique

Jeong, Kwangbok; Hong, Taehoon; Chae, Myeongsoo; Kim, Jimin; Lee, Minhyun; Koo, Choongwan; Ji, Changyoon

doi:10.1016/j.enbuild.2017.07.039

Cited by 8 publications

(5 citation statements)

References 46 publications

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“…The operation mode was represented by the thermal load and its regime that can be either in storage or production modes. This approach can give us the ground for defining effectivity criteria upon our installation design by means of the critical fluid or ground temperatures [54].…”

Section: Discussionmentioning

confidence: 99%

Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season

Клемпа

Látal

Grafova

et al. 2021

Sensors

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This research was undertaken to perform and evaluate the temperature measurement in the ground utilized as an energy source with the goal to determine whether significant temperature variations occur in the subsurface during the heating season. The research infrastructure situated on our University campus was used to assess any variations. The observations were made at the so called “Small Research Polygon” that consists of 8 monitoring boreholes (Borehole Heat Exchangers) situated around a borehole used as an energy source. During the heating season, a series of monthly measurements are made in the monitoring boreholes using a distributed temperature system (DTS). Raman back-scattered light is analysed using Optical Frequency Time Domain Reflectometry (OTDR). Our results indicate that no noticeable changes in temperature occur during the heating season. We have observed an influence of long-term variations of the atmospheric conditions up to the depth of a conventional BHE (≈100 m). The resulting uncertainty in related design input parameters (ground thermal conductivity) was evaluated by using a heat production simulation. Production data during one heating season at our research facilities were evaluated against the design of the system. It is possible to construct smaller geothermal installations with appropriate BHE design that will have a minimal impact on the temperature of the surrounding rock mass and the system performance.

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Section: Discussionmentioning

confidence: 99%

Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season

Клемпа

Látal

Grafova

et al. 2021

Sensors

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“…The pollution is increasing and resultantly groundwater is contaminating (Adrover et al, 2017;Bishop et al, 2017;Bradley et al, 2016;Bricker et al, 2017;Fackrell et al, 2016;Fisher et al, 2016;K'Oreje et al, 2016;LaGro et al, 2017;Lamastra et al, 2016;Ma et al, 2016a;Ma et al, 2016b;Richardson et al, 2017;Robertson et al, 2016;Sanciolo and Gray, 2017;Yan et al, 2017a;Yan et al, 2017b). The integration of finite element techniques is proved to efficient technique for evaluation of trans-Amadi groundwater parameters and could possibly be used for the monitoring of ground water to evaluate the effect of pollution on water quality (Alaboodi and Hussain, 2017;Awais et al, 2017;Boffi and Stenberg, 2017;Hedayat et al, 2017;Jacques et al, 2017;Jeong et al, 2017;Keith et al, 2017;Lee et al, 2017;Liu et al, 2017;Lostado-Lorza et al, 2017;Mironova et al, 2017).…”

Section: Prediction Of Groundwater Parameters Interaction Bymentioning

confidence: 99%

Development and evaluation of trans-Amadi groundwater parameters: The integration of finite element techniques

Int¹

2019

Preprint

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Mathematical model was developed and evaluated to monitor and predict the groundwater characteristics of Trans-amadi region in Port Harcourt City. In this research three major components were considered such as chloride, total iron and nitrate concentration as well as the polynomial expression on the behavious on the concentration of each component was determined in terms of the equation of the best fit as well as the square root of the curve. The relationship between nitrate and distance traveled by Nitrate concentration by the model is given as Pc = 0.003x2 - 0.451x + 14.91with coefficient of determination, R² = 0.947, Chloride given as Pc = 0.000x2 - 0.071x + 2.343, R² = 0.951while that of Total Iron is given as Pc = 2E-05x2 - 0.003x + 0.110, R² = 0.930. All these show a strong relationship as established by Polynomial Regression Model. The finite element techniques are found useful in monitoring, predicting and simulating groundwater characteristics of Trans-amadi as well as the prediction on the variation on the parameters of groundwater with variation in time.

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“…As the ground is worked as a thermal source/sink, the performance and thermal efficiency of HGSHP systems are significantly influenced by the undisturbed ground temperature (Radioti et al, 2017;Jeong et al, 2017). In the ground, the undisturbed ground temperature within a certain depth range from the ground surface fluctuates with time because of the influences of the local climatic conditions and the ground structure conditions.…”

Section: Introductionmentioning

confidence: 99%

Improving computational efficiency of numerical modelling of horizontal ground source heat pump systems for accommodating complex and realistic atmospheric processes

et al. 2022

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Development of the hybrid model for estimating the undisturbed ground temperature using the finite element method and geostatistical technique

Cited by 8 publications

References 46 publications

Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season

Inquiry into the Temperature Changes of Rock Massif Used in Energy Production in Relation to Season

Development and evaluation of trans-Amadi groundwater parameters: The integration of finite element techniques

Improving computational efficiency of numerical modelling of horizontal ground source heat pump systems for accommodating complex and realistic atmospheric processes

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