Search for dissertations about: "ground temperature"

Showing result 1 - 5 of 261 swedish dissertations containing the words ground temperature.

2. 1. An experimental investigation of spur gear efficiency and temperature : A comparison between ground and superfinished surfaces

   Author : Martin Andersson; Ulf Olofsson; Bengt-Göran Rosén; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gears; ground; superfinished; efficiency; temperature; running-in; dip lubrication; spray lubrication; Machine Design; Maskinkonstruktion;

   Abstract : This thesis focuses on reliability when testing gear efficiency and on how gear mesh efficiency can be increased without detrimental effects on the gears. Test equipment commonly used in gear research was analysed to identify important parameters for gear efficiency testing. READ MORE

4. 2. Direct Ground Cooling Systems for Office Buildings

   Author : Taha Arghand; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ground heat exchangers; Energy renovation; Renewable energy; GeoTABS; Active chilled beams; Geocooling systems; TABS; ground-coupled cooling; Passive ground cooling; Thermal comfort; Direct ground cooling; Energy efficiency; Boreholes; Ceiling cooling panels; High-temperature cooling; Optimization; Comfort cooling;

   Abstract : The solving of crucial global energy challenges hinges on improving energy efficiency in building energy systems. Accomplishing energy-efficiency targets often entails incorporating sustainable energy sources into the energy supply system. READ MORE

5. 3. Design of ground source heat pump systems. Thermal modelling and evaluation of boreholes

   Author : Saqib Javed; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ground-coupled; optimization; simulation; borehole; Ground source heat pump; ground heat exchanger; thermal response test; fluid temperature; sensitivity analysis;

   Abstract : Ground source heat pump systems are fast becoming state-of-the-art technology to meet the heating and cooling requirements of the buildings. These systems have high energy efficiency potential which results in environmental and economical advantages. READ MORE

6. 4. Capacity-controlled Ground Source Heat Pump Systems for Swedish single-family dwellings

   Author : Hatef Madani; Per Lundqvist; Joachim Claesson; Jose Miguel Corberan Salvador; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Heat Pump; Capacity control; ground; ground source; geothermal;

   Abstract : The overall objective of this thesis is to develop a structured method to approach the challenge of better understanding the techniques and potential for capacity control in Ground Source Heat Pump (GSHP) systems used in Swedish single-family dwellings. This thesis aims at development of a generic model of the system that can be used for comparative, descriptive, and predictive analysis of capacity controlled GSHP systems in single-family dwellings. READ MORE

7. 5. Spatial variations of the urban climate and its influence on thermal comfort and behaviour

   Author : Fredrik Lindberg; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sky view factor; air temperature; surface temperature; GIS; raster modelling; mean radiant temperature; globe temperature; the SOLWIEG-model; human behaviour; outdoor activity;

   Abstract : The increased number of people living in urban areas emphasises the need for an improved understanding of how the urban climate affects human activity and behaviour. The spatial and temporal variation of climate within cities is an important factor in people’s health and well-being. READ MORE