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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Study of the efficiencies and the relative merits of convection and radiant heating systems

Robinson, Harry Carter 08 1900 (has links)
No description available.
2

Development of an infrared oven

Unknown Date (has links)
"The purpose of this study was to determine the advantages of cooking or heating individual portions of food with infra-red radiant energy to a condition ready to serve in a minimum period of time"--Introduction. / Typescript. / "May, 1954." / "Submitted to the Graduate Council of Florida State University in partial fulfillment of the requirements for the degree of Master of Science." / Includes bibliographical references.
3

District Heating in Slough

Netterberg, Hanna, Isaksson, Isabel January 2009 (has links)
<p>District heating through the Swedish model has proven to be an environmental and financially beneficial solution for heating. By reusing energy resources that normally would be wasted con-tributes district heating in an effective way to the society’s energy consumption. Today district heating stands for more than fifty percent of the heat supply to the Swedish residential and service sector buildings. The long tradition in the area has generated knowledge and experiences that to-day are applicable to other countries that are looking for more environmental conscious heating alternatives.</p><p>The goal and purpose with this thesis has been to use the Swedish knowledge gained in district heating and apply them in United Kingdom, where district heating currently comprise a low pro-portion of the total energy supply. Through an analytical method, the effective width (ground area/trench length) has been calculated for several city districts in Halmstad and Göteborg. This material has been used to decide the distribution costs depending on different charicaristic num-bers and by so the capital cost for district heat distribution has been estimated for some selected city districts in Slough, United Kingdom.</p><p>The result indicates that the effective width can be constant, although this cannot be verified due to possible noice in the data. The capital cost for Slough has shown being slightly higher than the estimated capital cost in the Swedish city districts. During the work of this thesis, differences in the residential living structure in respective country have been identified, which can be a contrib-uting explaination to the higher capital cost in Slough. Though the results still supports the in-crease in usage of district heating in United Kingdom, if low cost heat is available.</p>
4

Experimental and theoretical investigations of microwave heating

Kota, Bhagat Chandra 30 September 2004 (has links)
In this work we proposed the governing equations for describing the microwave heating process where the complex interactions between the thermo-mechanical and electromagnetic fields are taken into account. Starting point are the general balance laws of mechanics and electrodynamics. Transient and spatial temperature profiles of liquids (water and corn solution) inside a cylindrical container during microwave heating at 2450 MHz were measured. Transient temperature rise at a given location was almost linear. The slowest heating region was at the container bottom due to small energy penetration through the bottom. Numerical simulations were carried out for microwave heating of 2D cylinders of pure water with internal convection in the liquid regions. The results are found to be consistent with those of the experiments. A generalized theoretical model was formulated for the process of microwave heating of materials. Finally stability analysis was done on a 1-D model of microwave heating and the equations for the perturbations were obtained.
5

District Heating in Slough

Netterberg, Hanna, Isaksson, Isabel January 2009 (has links)
District heating through the Swedish model has proven to be an environmental and financially beneficial solution for heating. By reusing energy resources that normally would be wasted con-tributes district heating in an effective way to the society’s energy consumption. Today district heating stands for more than fifty percent of the heat supply to the Swedish residential and service sector buildings. The long tradition in the area has generated knowledge and experiences that to-day are applicable to other countries that are looking for more environmental conscious heating alternatives. The goal and purpose with this thesis has been to use the Swedish knowledge gained in district heating and apply them in United Kingdom, where district heating currently comprise a low pro-portion of the total energy supply. Through an analytical method, the effective width (ground area/trench length) has been calculated for several city districts in Halmstad and Göteborg. This material has been used to decide the distribution costs depending on different charicaristic num-bers and by so the capital cost for district heat distribution has been estimated for some selected city districts in Slough, United Kingdom. The result indicates that the effective width can be constant, although this cannot be verified due to possible noice in the data. The capital cost for Slough has shown being slightly higher than the estimated capital cost in the Swedish city districts. During the work of this thesis, differences in the residential living structure in respective country have been identified, which can be a contrib-uting explaination to the higher capital cost in Slough. Though the results still supports the in-crease in usage of district heating in United Kingdom, if low cost heat is available.
6

Experimental investigation of flow boiling and spray cooling on enhanced surfaces in Fc-72

Moreno, Gilberto. January 2009 (has links)
Thesis (Ph.D.) -- University of Texas at Arlington, 2009.
7

Experimental and theoretical investigations of microwave heating

Kota, Bhagat Chandra 30 September 2004 (has links)
In this work we proposed the governing equations for describing the microwave heating process where the complex interactions between the thermo-mechanical and electromagnetic fields are taken into account. Starting point are the general balance laws of mechanics and electrodynamics. Transient and spatial temperature profiles of liquids (water and corn solution) inside a cylindrical container during microwave heating at 2450 MHz were measured. Transient temperature rise at a given location was almost linear. The slowest heating region was at the container bottom due to small energy penetration through the bottom. Numerical simulations were carried out for microwave heating of 2D cylinders of pure water with internal convection in the liquid regions. The results are found to be consistent with those of the experiments. A generalized theoretical model was formulated for the process of microwave heating of materials. Finally stability analysis was done on a 1-D model of microwave heating and the equations for the perturbations were obtained.
8

Exploring conditions leading to self-heating of pyrrhotite-rich materials

Wang, Xinran, 1973- January 2007 (has links)
Self-heating of sulphide minerals has a potential for serious impact on environment and safety in mining of ores, and storage and transport of concentrates. A research program, focused on the investigation of the conditions under which the H2S is produced from pyrrhotite-rich materials, has been initiated using the self-heating facility and technology developed at the Noranda Technology Centre. It is hypothesized that H 2S production could be important in self-heating as the exothermic heat of oxidation of H2S to SO2 is greater than that for oxidation of S to SO2. / The hypothesis of liberation of H2S was tested using copper (as metal pieces and sulphate solution) as a detector, both in the self-heating apparatus and in a "weathering" apparatus at 40°C. X-ray diffraction and scanning electron microscopy analysis of coatings and precipitates confirmed the formation of copper sulphide and therefore indicated the release of H 2S. Release of H2S involves acid conditions and the possible origin of the acidity was discussed. / Prior work had suggested that the level of exposure to oxygen was a factor in self-heating. Tests were conducted to explore the role of oxygen level. Three tests were conducted in the weathering apparatus at 40°C with covers of no hole, 3 holes and 128 holes to control access the air. Weight gain was recorded every two days and stage B self-heating tests were conducted on the samples after a month of weathering. Under limited air access (no hole and 3 hole covers), the samples showed higher weight gain, higher degree of oxidation (by colour change) and higher self-heating rates compared with the sample with more exposure to air (128 hole cover). X-ray diffraction analysis identified the oxidation products elemental sulphur, maghemite and goethite in the samples under the limited air conditions. A series of non-standard self-heating tests were conducted in the self-heating apparatus under different air flow rates of Stage A. These showed that the samples weathered under low air flow rates yielded significantly higher self-heating rates in both stage A and B. / All the experiments indicate that a high level of exposure to air dose not promote self-heating but rather suppress it. Less oxidative conditions play a critical role in the self-heating of pyrrhotite-rich materials.
9

Special design features of a steam heating installation in Istanbul, Turkey /

Ozipek, Kamran Abdurrahim. January 1948 (has links)
Thesis (M.S.)--Oregon State College, 1948. / Typescript. Includes bibliographical references (leaves 94-95). Also available via the World Wide Web.
10

Radiation on a solar pond with polyethylene covers and reflector /

Husseini, Ihsan Ibrahim, January 1977 (has links)
Thesis (M.S.)--Ohio State University, 1977. / Includes bibliographical references (leaves 70-71). Available online via OhioLINK's ETD Center

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