6 results for “Optimum numbers”

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Research ArticleOpen accessPhrase in the titleOn the Optimum Numbers of Stages in Vapour Compression Refrigeration SystemsDurriye Bilge, Galip TemirIn this study, cases of single-stage and multi-stage compression have been compared and contrasted through various angles while concentrating on refrigeration systems with 600 kW cooling capacity and working with ammonia. For five different numbers of stages, power consumption, costs of investment, operation and maintenance (O and M), COP and 2nd law efficiencies have been calculated. As the amount of … …American Journal of Applied Sciences, Vol. 1, Issue 2 · 30 Jun 2004 · 6,688 accessesView PDF Cite

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 PDF Cite

Research ArticleOpen accessIn the abstractENERGY PERFORMANCE IMPROVEMENT, FLOW BEHAVIOR AND HEAT TRANSFER INVESTIGATION IN A CIRCULAR TUBE WITH V-DOWNSTREAM DISCRETE BAFFLESWithada Jedsadaratanachai, Amnart BoonloiA mathematical study has been carried out to examine periodic laminar flow and heat transfer characteristics in a three-dimensional isothermal wall circular tube with 45° in-line V-discrete baffles. The computations are based on the Finite Volume Method (FVM) and the SIMPLE algorithm has been implemented. The fluid flow and heat transfer characteristics are presented for Reynolds numbers based on the … …Journal of Mathematics and Statistics, Vol. 9, Issue 4 · 23 Nov 2013 · 6,376 accessesView PDF Cite

Research ArticleOpen accessIn the abstractAn Effective Passive Solar Dryer for Thin Layer Drying of Poultry ManureA. E. Ghaly, K. N. MacDonaldAnimal and poultry manures have been recognized for centuries as organic fertilizers providing essential nutrients to crops and improving soil structure due to their large input of organic matter. Increasing demand for poultry and egg products has led to intensification of the poultry rearing process, resulting in large amounts of poultry manure. Drying can be used to reduce the environmental … …American Journal of Engineering and Applied Sciences, Vol. 5, Issue 2 · 4 Aug 2012 · 10,310 accessesView PDF Cite

Research ArticleOpen accessIn the abstractFocusing of the Flow Capture for Local Exhaust Ventilation SystemsS. Y. Spotar, A. L. SorokinProblem statement: The extraction hoods commonly used as inlet element of the local ventilation systems exhibit limited emission capture over moderate distances from the source of the hazardous emissions. Proposed inclusion of a swirling peripheral jet was found to increase the effective length over which the extraction hood successfully captures harmful fumes. However information on a detailed pattern field of … …American Journal of Applied Sciences, Vol. 7, Issue 6 · 30 Jun 2010 · 7,329 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDevelopment of Criteria for Slab Compaction of Laboratory Roller Compactor (Turamesin)R. Muniandy, F.M. Jakarni, S. Hassim, A.R. MahmudLaboratory experiments should simulate to a high degree the conditions in the field, especially in term of compaction procedures. Presently available laboratory compaction methods do not seem to be able to produce specimens that can truly represent the mixtures as it exists in the field, especially for Stone Mastic Asphalt (SMA) mixtures. SMA is highly dependent on the method of … …American Journal of Applied Sciences, Vol. 4, Issue 11 · 30 Nov 2007 · 7,118 accessesView PDF Cite