Results 1 - 10 of 591
Results 1 - 10 of 591. Search took: 0.028 seconds
|Sort by: date | relevance|
[en] The paper discusses combined production of heat and power (CHP) from industrial wood residues. The system will be powered by wood residues generated during manufacturing process of wooden floor panels. Based on power and heat demands of the plant and wood residues potential, the CHP system was selected. Preliminary analysis of biomass conversion in CHP system and environmental impact was performed.
[en] The methods and techniques commonly used in investigating the change of entropy and heat generation in Li cells/batteries are introduced, as are the measurements, calculations and purposes. The changes of entropy and heat generation are concomitant with the use of Li cells/batteries. In order to improve the management and the application of Li cells/batteries, especially for large scale power batteries, the quantitative investigations of the change of entropy and heat generating are necessary. (topical review)
[en] Calorimetric results indicate that nitrocellulose (NC)-induced changes in the metabolism of Desulfovibrio desulfuricans 1388 are caused by both chemical (nitrate) and physical (biofilm formation) factors. Nitrate added to lactate-based culture medium with nitrocellulose competed for the electron flux from lactate and suppressed the bacterial sulfidogenesis and growth. The presence of an insoluble compound (carbon backbone of the polymer) induced the creation of a biofilm-like structure with its own metabolism
[en] Production of additional energy in collision of metallic projectile with solid target is considered. It is shown that when the projectile speed exceeds certain threshold, the heat energy after collision may sufficiently exceed the kinetic energy of the projectile
[ru]Рассматривается механизм выделения дополнительной энергии при соударении металлических объектов (снарядов) с твердой преградой. Показывается, что тепловая энергия, выделяемая после удара, может существенно превышать кинетическую энергию металлического снаряда, если он движется со скоростью, превышающей некоторую пороговую
[en] This paper presents the business models of small-scale heat energy production in Finland. Firstly, the development of heat entrepreneurship in the country is presented, including the remarkable growth of small and medium size enterprises (SMEs) in the last 15 years. Secondly, the concept of business model (business architecture of product/service flows and earning logics) is modified to the framework of wood heat production. The business model concept, and its sub-concepts, is applied in a brief review of current heat energy businesses in Finland. We arrive at a business model of heat entrepreneurships that are public companies/utilities, public-private partnerships, private companies and cooperatives, Energy Saving Company (ESCO), network model of large enterprise and franchising. Descriptive cases of these models are presented. Finally, the paper concludes with a discussion on the applicability of the business models in different operational environments and geographical contexts.
[en] Concepts and international frames of generation IV nuclear reactors. A review of use of nuclear energy for non electric applications especially in areas such as seawater desalination, hydrogen production, district heating and other industrial applications. (Author)
[en] Constructal theory has been used in several scientific fields since it has been established a decade ago. It mainly treats of the 'area to point' flow problem, which has been first-written in the frame of the cooling of a finite-size volume generating heat. This problem, widely discussed in literature, has been optimized thanks to constructal theory formulated by Bejan, with a deterministic approach. However, some of the physical and mathematical assumptions made to simplify the problem are questionable, especially the ones regarding the high-conductivity material constituting the tree-shaped structure. In this paper, the performances of constructal designs are evaluated using a finite volume method, which allows making a comparison between different constructal geometries. An algorithm has been developed which has the ability for restraining constructal networks inside a finite-size area, without overconstraining the structure. All things considered, this paper examines constructal theory from a new point of view thanks to analytical and numerical investigations, in the frame of a finite-size volume generating heat.
[en] Use of nuclear energy relies on operation of a boiler, involving practically no greenhouse gas emission. Whereas production of electricity is, nowadays, virtually its sole purpose, demand for heat production could equally arise, particularly with the emergence of high-temperature, or even very-high-temperature reactors. With the abilities this involves, as regards the recovery of heavy crude oils from tar sands, seawater desalination, or, most importantly, production of hydrogen by electrolysis, or thermochemistry, this being the energy carrier of tomorrow. (authors)
[en] Modern infrared focal plant array cameras with thermal sensitivities up to 0.01 - 0.02 deg. C have made it possible to form a novel view of various physical, chemical, and biological processes that involve both the heat production and mobility of fluids affected by local thermal gradients. The mobility of water is important, especially in studying the formation mechanisms of water structures due to Rayleigh -Benard convection. Various water structures can successfully be studied using infrared imaging. (instruments and methods of investigation)