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40 articles for “exchanger”
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Research ArticleOpen accessIn the keywordsThermal Performance of a Solar Heat Storage Accumulator Used For Greenhouses ConditioningMejdi Hazami, Sami Kooli, Meriam Lazaar et al.The use of solar energy for greenhouse heating has gained an increasing acceptance during the last years. Active solar systems applied to greenhouses can supply a significant part of the heating requirements. However, there are some problems related to the cost of the heat collection unit and the heat storage methods. In this context several techniques were born. The most … …American Journal of Environmental Sciences, Vol. 1, Issue 4 · 31 Dec 2005 · 7,037 accessesView PDFCite
Research ArticleOpen accessIn the abstractDynamic Synthesis of a Dual-Clutch Automatic GearboxesRelly Victoria Virgil Petrescu, Raffaella Aversa, Antonio Apicella, Florian Ion Tiberiu PetrescuRelatively recent have occurred dual-clutch automated boxes, which promise a lot in the field and can be used successfully in cars and trains as well as in the aerospace industry. This paper wants not only to present such a gearbox but also to realize its dynamic synthesis, based on the engineering optimization of the mechanical efficiency achieved in each used … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 2 · 8 May 2018 · 7,947 accessesView PDFCite
Research ArticleOpen accessIn the abstractInvestigation into the Use of Electrochemical Extraction to Draw Gold from Refractory OresBagdaulet Kenzhalyevich Kenzhaliyev, Zamzagul Duisenovna Dosymbaeva, Renata Ramilevna Iskhakova, Essen Nurgalievich SuleimenovThis paper studies the possibility of extracting gold by electrochemical leaching through the use of a sodium thiosulfate solution. In this regard, the requirements for environmentally sound technologies play a huge and vital role. Low extraction ratios and metal losses increase the cost of this process significantly and therefore it is necessary to reduce or prevent these disadvantages. Dissolution of … …American Journal of Applied Sciences, Vol. 12, Issue 11 · 17 Nov 2015 · 6,681 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Exhaust Gas Temperature on the Performance of Automobile Adsorption Air-ConditionerAbdul Hadi N. Khalifa, Ali H. Jabbar, Jamal A. MuhsinAn adsorption air conditioning unit of two beds was designed and built. Each bed was constructed from two concentric copper pipes sets, the length of the pipes in each set was 1500 mm pipe. The inner pipe was 50 mm in diameter while the outer pipe was of 100 mm diameter. The inside surface of the outer pipe and the … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 4 · 13 Oct 2015 · 8,083 accessesView PDFCite
Research ArticleOpen accessIn the abstractChanges in the Rumen Papillae During the Periparturient Transition in Holstein Dairy Cows are Accompanied by Changes in Abundance of Proteins Involved in Intracellular pH Regulation, But not SCFA TransportAnne Hermen Laarman, Adam Kleinberg, Michael Alexander Steele et al.The objective of this study was to examine changes in SCFA transport capacity in the rumen epithelium during the parturition transition period. Twelve pregnant, cannulated primiparous and multiparous cows were fed a standard Total Mixed Ration (TMR) for the duration of the dry period; after calving, all cows were switched to an early lactation TMR. Rumen pH, fluid and biopsies … …American Journal of Animal and Veterinary Sciences, Vol. 10, Issue 1 · 31 Mar 2015 · 7,546 accessesView PDFCite
Research ArticleOpen accessIn the abstractInfluence of Flow Direction on Vortex Flow Structure, Heat Transfer and Performance Improvement in Tube with V-Discreted BafflesWithada Jedsadaratanachai, Amnart BoonloiNowadays, the compact heat exchanger is used widely like a radiator, evaporator and condenser of air condition system, cooling device of electronic. Extensive studies have been done on the heat transfer characteristics and flow structure for the heat exchanger with longitudinal vortex generators by numerical method. Periodic laminar flow and heat transfer characteristics in a three-Dimensional (3D) isothermal circular tube … …American Journal of Applied Sciences, Vol. 11, Issue 11 · 7 Jan 2015 · 6,714 accessesView PDFCite
Research ArticleOpen accessIn the abstractThermal Performance Assessment for Laminar Forced Convection with Downstream Reformed-V and Reformed-Double-V GeneratorsWithada Jedsadaratanachai, Amnart BoonloiThermal assessments for laminar flow in an isothermal wall square channel over downstream Reformed-V (RV) and Reformed-Double-V (RDV) generators inserted diagonally are presented numerically in three dimensional. The RV and RDV are designed to comfort for forming and installing in the heat exchanger channel. The effect of RV and RDV height is investigated in terms of blockage ratio, b/H, BR … …Journal of Mathematics and Statistics, Vol. 10, Issue 4 · 1 Jan 2015 · 6,747 accessesView PDFCite
Research ArticleOpen accessIn the abstractButyrate and Subacute Ruminal Acidosis Affect Abundance of Membrane Proteins Involved with Proton and Short Chain Fatty Acid Transport in the Rumen Epithelium of Dairy CowsAnne Hermen Laarman, Louis Dionissopoulos, Ousama AlZahal et al.The objective of this study was to elucidate the effects of butyrate on the Short Chain Fatty Acids (SCFA) membrane transport proteins and proton membrane transport proteins in the rumen epithelium. Sixteen mid-lactation cows were fed a 44% Non-Fibre Carbohydrate (NFC) diet and divided into a control treatment and a butyrate treatment. For 7 days, the cows on the control … …American Journal of Animal and Veterinary Sciences, Vol. 8, Issue 4 · 27 Nov 2013 · 7,475 accessesView PDFCite
Research ArticleOpen accessIn the abstractDesign and Parametric Optimization of an Organic Rankine Cycle Powered by Solar EnergyFrancesco Calise, Claudio Capuozzo, Laura VanoliThis study presents the simulation and performance analysis of a regenerative and superheated Organic Rankine Cycle (ORC). To this scope, anew simulation model has been developed. The model is based on zero-dimensional energy and mass balances for all the components of the system. Shell and tube heat expanders with single shell and double tube pass have been chosen. Pump and … …American Journal of Engineering and Applied Sciences, Vol. 6, Issue 2 · 15 May 2013 · 7,684 accessesView PDFCite
Research ArticleOpen accessIn the abstractExperimental Efficiency Investigation on Heat Recovery System Used in a Solar-Powered Desalination ProcessAouatef Rachdi, Louy Qoaider, Mahmoud Ben-Amara, AmenAllah GuizaniThe aim of this work is to experimentally study, the effect of the heat recovery on water production in a solar desalination process that is working with multiple stage humidification technique. The water production, the temperature and the humidity were tested for such a pilot plant, which operates without and with a heat recovery system. The humidifier efficiency increases with … …Energy Research Journal, Vol. 3, Issue 2 · 11 Mar 2013 · 7,264 accessesView PDFCite