Showing 11 - 20 of 113
Persistent link: https://www.econbiz.de/10013362490
Computer simulation of borehole ground heat exchangers used in geothermal heat pump systems was conducted using three …-dimensional implicit finite difference method with rectangular coordinate system. Each borehole was approximated by a square column … circumscribed by the borehole radius. Borehole loading profile calculated numerically based on the prescribed borehole temperature …
Persistent link: https://www.econbiz.de/10010803683
Water pumping has been one of the main applications for wind power in the past and despite the spread of mains-electric pumps, more than a million windpumps remain in regular use. This paper reviews the general technical and economic requirements for pumping water using wind energy and by way of...
Persistent link: https://www.econbiz.de/10010803875
In this paper a numerical model to analyze the thermal behaviour of vertical ground heat exchangers with a helical shaped pipe is presented. This type of configuration can be a suitable alternative to conventional ground heat exchangers, especially when the heating and cooling loads of the...
Persistent link: https://www.econbiz.de/10010603035
. First, a one-dimensional radial numerical heat transfer model is developed to evaluate heat transfer from the borehole wall … using temperature measurements. The apparatus mimics the behavior of a geothermal borehole and uses a homogeneous saturated …
Persistent link: https://www.econbiz.de/10010702560
of great importance for the design and sizing of borehole thermal energy systems (BTESs). In Scandinavia groundwater … groundwater flow between the borehole and the surrounding rock. An enhanced heat transport then occurs due to the induced … part of the borehole while groundwater of ambient temperature enters the borehole through fractures at larger depths. This …
Persistent link: https://www.econbiz.de/10011044580
The objective of this study is to show the temperature distribution development in the borehole of the ground … was placed in a vertical borehole (VB) with 30 (VB1), 60 (VB2) and 90 (VB3)m depths and 150mm diameters. The experimental …
Persistent link: https://www.econbiz.de/10011044785
of safe and consistent water supplies for drinking and other domestic or agricultural uses. Borehole supplies are capable …
Persistent link: https://www.econbiz.de/10011044908
In this paper different approaches to groundwater flow and its effect in the vicinity of a borehole ground heat …
Persistent link: https://www.econbiz.de/10011045725
Analysis of borehole thermal resistance is important for the standard sizing of ground heat exchanger (GHE). In this … paper, a p-linear dimensionless average fluid temperature is proposed to estimate borehole thermal resistance. A p …
Persistent link: https://www.econbiz.de/10011045805