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E. Pfender

Bio: E. Pfender is an academic researcher from University of Minnesota. The author has contributed to research in topics: Heat transfer & Convective heat transfer. The author has an hindex of 11, co-authored 17 publications receiving 234 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors present results from the 1975 International Solar Energy Congress and Exposition (ILSCE) in Los Angeles, California, USA and present a survey of the literature in various fields of heat transfer during 1975.

20 citations

Journal ArticleDOI
TL;DR: The Revue des publications en langue anglaise dans le domaine du transfert de chaleur, pour l'annee 1987 as mentioned in this paper, for l'Annee 1987

19 citations


Cited by
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Journal ArticleDOI
TL;DR: A critical review on the processing and application of rice husks (RHs) for the production of various silicon-based materials and of active carbon is presented in this paper, which addresses the different processing methods, the effects of various process parameters on the pyrolysis stage, the influence of physical, chemical and thermal treatments, activating conditions and activated carbon consolidation mechanisms.

433 citations

Journal ArticleDOI
TL;DR: In this article, the methods of synthesizing silicon-based materials from rice husks and their applications are reviewed in a very comprehensive manner, including silicon carbide, silica, silicon nitride, silicon tetrachloride, and pure silicon.
Abstract: Rice husk (RH) has now become a source for a number of silicon compounds, including silicon carbide, silica, silicon nitride, silicon tetrachloride, zeolite, and pure silicon. The applications of such materials derived from rice husks are very comprehensive. The methods of synthesizing these silicon-based materials from RHs and their applications are reviewed in this paper.

368 citations

Journal ArticleDOI
TL;DR: In this article, fundamental aspects of anatomy of wood and molecular structure of wood cell wall affecting the bio-organic-inorganic conversion process are reviewed, and basic approaches to convert the native biopolymeric materials into non-oxide as well as oxide ceramic products include pyrolytic decomposition resulting in a porous carbon replica (template) which may subsequently be reacted to form carbide phases or may be infiltrated with non-reacting sols or salts which can further be processed to yield oxide reaction products.
Abstract: Lignocellulosics represent the organic matter produced by trees. Biopolymers such as cellulose, hemicellulose and lignin are the major macromolecular constituents of ligneous cell walls which are distinguished by a hierarchical fibrilar composite micro structure. Fundamental aspects of anatomy of wood and molecular structure of wood cell wall affecting the bioorganic–inorganic conversion process are reviewed. Basic approaches to convert the native biopolymeric materials into non-oxide as well as oxide ceramic products include: (i) pyrolytic decomposition resulting in a porous carbon replica (template) which may subsequently be reacted to form carbide phases or may be infiltrated with non-reacting sols or salts which can further be processed to yield oxide reaction products; (ii) infiltration of chemically preprocessed native lignocellulosic products with gaseous or liquid organometallic and metalorganic precursors and subsequent oxidation to remove the free carbon phase. Conversion of native (wood tissue) lignocellulosics into ceramics with a microstructure pseudomorphous to the bioorganic template anatomy offers a great potential for designing novel ceramics with anisotropic cellular morphologies. These might be of interest for applications as high temperature resistant exhaust gas filters and catalyst carriers in energy, environmental and automotive industries, bioinert and corrosion resistant immobilization supports for living cells, microbes, or enzymes in biotechnology and medicine.

290 citations

01 Jan 1977
TL;DR: In this paper, the effects of storage capacity, storage unit heat transfer characteristics, collector area and location on the system performance are investigated for systems utilizing sodium sulfate decahydrate and paraffin wax as storage media.
Abstract: Models describing the transient behavior of phase-change energy storage (PCES) units are presented. Simulation techniques are used in conjunction with these models to determine the performance of solar heating systems utilizing PCES. Both air-based and liquid-based systems are investigated. The effects of storage capacity, storage unit heat transfer characteristics, collector area and location on the system performance are investigated for systems utilizing sodium sulfate decahydrate and paraffin wax as storage media. Optimum ranges of storage sizes are recommended on the basis of systems' thermal performance. Comparison is made between systems utilizing PCES and those using sensible heat storage, viz. rock beds in air-based systems and water tanks in liquid-based systems. The variation of the solar supplied fraction of load with storage size and collector area is given for systems utilizing both types of storage. The effects of location and collector energy loss coefficient on the relative performance of PCES and sensible heat storage are also investigated.

174 citations

Journal ArticleDOI
TL;DR: In this article, the effect of phase change materials (PCM) on electrical parameters of low-concentration BICPV system via thermal regulation has been evaluated with an in-house designed and fabricated PCM containment, which showed an increase in relative electrical efficiency by 7.7% with PCM incorporation.

157 citations