• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 397
  • 62
  • 56
  • 28
  • 28
  • 28
  • 28
  • 28
  • 27
  • 17
  • 12
  • 9
  • 9
  • 4
  • 4
  • Tagged with
  • 699
  • 235
  • 133
  • 111
  • 96
  • 86
  • 75
  • 72
  • 71
  • 71
  • 58
  • 56
  • 54
  • 54
  • 51
  • 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.
291

Design and performance analysis of hybrid photovoltaic-thermal grid connected system for residential application.

Mutombo, Ntumba Marc-Alain. January 2012 (has links)
High output electrical energy is obtained from photovoltaic (PV) systems subject to high irradiance. However, at high irradiance, the efficiency of PV systems drops due to increase of the temperature of the systems. In order to improve the efficiency of photovoltaic systems, much effort has been spent on developing hybrid photovoltaic thermal (PVT) systems using water as a coolant to withdraw heat from solar modules. This research is focused on the study of the behavior of hybrid PVT collectors using rectangular channel profiles which provide a large surface for heat exchange between PV panels and thermal collectors unlike the circular channel profile used in conventional PV systems. In hybrid PVT systems, coolant water circulates in a closed circuit by means of the thermosyphon phenomenon and the heat from this water is extracted from a storage tank and can be used in hot water systems instead of an electric geyser. Numerical models of water velocity in channels due to the thermosyphon phenomenon and the temperature of solar modules was developed and a system was designed for modest Durban household demand. A simulation was run for specific summer and winter days comparing a conventional PV system and a hybrid PVT system. The results were very encouraging, and demonstrated that the equipment is capable of extending the PVT application potential in the domestic sector where more than 40% of electricity cost is heating water. / Thesis (M.Sc.Eng.)-University of KwaZulu-Natal, Durban, 2012.
292

Patterns of rural household energy consumption and fuel preferences : a case study in Oyo State, south-western Nigeria

Ayoub, Josef. January 1988 (has links)
No description available.
293

Dwelling and the woman artist in Anne Brontë's The tenant of Wildfell Hall

Lupold, Rebecca Lynn. January 2008 (has links)
Thesis (M.A.)--University of Montana, 2008. / Title from title screen. Description based on contents viewed Aug. 13, 2008. Includes bibliographical references (p. 95-99).
294

The grim word : 'home' in fiction by Graham Greene /

Cowgill, Geoff, January 2008 (has links) (PDF)
Thesis (M.A.)--Eastern Illinois University, 2008. / Includes bibliographical references (leaves [73]-[79]).
295

Under lock and key : securing privacy and property in Victorian fiction and culture

Smith, David, January 2007 (has links)
Thesis (Ph. D. in English)--Vanderbilt University, Aug. 2007. / Title from title screen. Includes bibliographical references.
296

Furnishing the Republican Court building and decorating Philadelphia homes, 1790-1800 /

Henderson, Amy Hudson. January 2008 (has links)
Thesis (Ph.D.)--University of Delaware, 2008. / Principal faculty advisor: Bernard L. Herman, Dept. of Art History. Includes bibliographical references.
297

Effects of open-plan housing on perceived household crowding among families with children /

Gruel, Nancy L. January 1993 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 134-145). Also available via the Internet.
298

Prehistoric alpine hunting patterns in the Great Basin /

Canaday, Timothy W. January 1997 (has links)
Thesis (Ph. D.)--University of Washington, 1997. / Includes bibliographical references (leaves [258]-290).
299

Logement et différenciation socio-spatiale / : étude rétrospective de la rénovation domiciliaire à Chicoutimi : 1974-1989 /

Boudreault, Stevens, January 1993 (has links)
Mémoire (M.E.S.R.)-- Université du Québec à Chicoutimi, 1993. / Résumé disponible sur Internet. CaQCU Document électronique également accessible en format PDF. CaQCU
300

Les impacts de l'implantation d'un megaprojet industriel sur le parc intermunicipal de logements : le cas du complexe industriel Alcan a Alma (Saguenay-Lac-Saint-Jean, Québec /

Doucet, Chantale, January 2000 (has links)
(M.E.S.R.)--Université du Québec à Chicoutimi, 2000. / "Dans le cadre du programme de recherche Modélidation du suivi des impacts sociaux de l'aluminium Alma" CaQCU Document électronique également accessible en format PDF. CaQCU

Page generated in 0.1098 seconds