Results 21 to 30 of about 42,019 (265)

Changes in shaft resistance and pore water pressures during heating of an energy foundation [PDF]

E3S Web of Conferences, 2020
This study focuses on the evolution of shaft resistance during operation of a geothermal energy foundation installed in a saturated glacial till layer. Energy foundations are a sustainable alternative to traditional space heating and cooling approaches ...
Reiter Michael B., Kurtz Lydia, Attala Mohammed M., Baser Tugce   +3 more
doaj   +1 more source

Passive soil heating using an inexpensive infrared mirror design – a proof of concept [PDF]

SOIL, 2015
There is a need to understand the soil system response to warming in order to model the soil process response to predicted climate change. Current methods for soil warming include expensive and difficult to implement active and passive techniques.
C. Rasmussen, R. E. Gallery, J. S. Fehmi
doaj   +1 more source

Mathematical modelling of heat transfer in a greenhouse with surface soil heating system

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska, 2019
The use of low-temperature heat of industrial and natural origin for heating the soil in greenhouses allows practitioners to get very early vegetable and berry crops.
Volodymyr Hud, Oleg Pinchuk, Petro Martyniuk, Ievgenii Gerasimov, Pavlo Volk   +4 more
doaj   +1 more source

Root temperature and energy consumption at different cable depths in electrically heated substrates

Scientia Agricola, 2011
A finite element method-based model of a substrate heated by an electric heating cable buried in a thermal isolated container was experimentally validated with root mean square error values of root zone temperature ranging 0.25 to 0.62 ºC.
María Dolores Fernandez, Manuel Ramiro Rodriguez, Rafael López Pidre, Teresa Teijeiro   +3 more
doaj   +1 more source

Experimental Research of the Heat Transfer into the Ground at Relatively High and Low Water Table Levels

Buildings, 2023
During the cold period, the heat transferred through the building’s external boundaries to the environment changes the naturally established heat balance between atmospheric air and soil layers.
Tadas Zdankus, Juozas Vaiciunas, Sandeep Bandarwadkar   +2 more
doaj   +1 more source

Research on multi-objective optimization of control strategies and equipment parameters for a combined heating system of geothermal and solar energy in cold and arid regions based on TRNSYS

Case Studies in Thermal Engineering, 2023
Focusing on the multiple objectives of maximum solar heating capacity, maximum COP of heat pump and minimum soil heating capacity, a model of one typical building and two heating strategies was established in the TRNSYS.
Chang Sun, Xiaolei Ju, Wengang Hao, Yongfei Lu   +3 more
doaj   +1 more source

Soil Heating Significantly Increases Leaf Magnesium Concentration and Fruit Yield in Tomatoes Produced in a Plastic Greenhouse During Winter

Agronomy
Magnesium (Mg) deficiency frequently occurs in tomato leaves grown in plastic greenhouses during winter in northern China. In this study, field experiments were conducted to test the effects of soil temperature and the potassium (K) fertilizer ...
Haofeng Lv, Jiaming Luan, Yunjie Guo, Jijie Liang, Xiangjun Li, Xiupeng Sun, Weiwei Zhou, Bin Liang   +7 more
doaj   +1 more source

A modified soil water content measurement technique using actively heated fiber optic sensor

Journal of Rock Mechanics and Geotechnical Engineering, 2020
Soil water content measurement is critical in practical engineering. The actively heated fiber Bragg grating optic sensor (FBGS) has great potential of multi-point measurement for soil water content measurement in field.
Meng Wang, Xu Li, Lihong Chen, Senquan Hou, Guiyan Wu, Zhilin Deng   +5 more
doaj   +1 more source

Experimental Study on Water Vapor Migration Patterns of Sealed Soil Columns under High-Temperature Conditions [PDF]

长江科学院院报
[Objective] In recent years, with frequent extreme climate events, the northwestern region of China has experienced large diurnal temperature difference in summer, with daytime high temperatures continuously rising and persisting for extended periods ...
HU Meng-ling, CHEN Hao, WANG Zhi-wen, GAO Ke-xin, GONG Jian-hua, KUANG Zhi-bin
doaj   +1 more source

Planned Heating Control Strategy and Thermodynamic Modeling of a Natural Gas Thermal Desorption System for Contaminated Soil

Energies, 2020
This paper presents a planned heating control strategy applied for a natural gas thermal desorption system for polluted soil to achieve the dynamic adjustment of the heating time and energy consumption. A lumped-parameter model for the proposed system is
Hui-Juan Xu, Yun-Ze Li, Li-Jun Gao, Xin Zhang   +3 more
doaj   +1 more source