Energy is a key aspect of any country’s economic development. Improving heat transfer performance leads to saving energy. Nanotechnology has role play in optimizing exchangers. Fluids containing nanosized particles are called nanofluids. Nanofluids have higher thermal conductivity than typical liquids. This paper outlines current research on convective performance, thermophysical properties, pa...

A MODEL OF AN AIR-CONDITIONING CONDENSER AND EVAPORATOR WITH EMPHASIS ON IN-TUBE ENHANCEMENT Kuo-Hsiu Huang Michael B. Pate Mechanical Engineering Department Iowa state University Ames, Iowa 50011 A computational model for air-conditioning condensers and evaporators with in-tube enhancement has been developed. The purpose of this model is to provide a tool for the design of plate tinned-tube he...

Nanofluids are suspended nano-sized particles in a base fluid. With increasing demand for more high efficiency thermal systems, nanofluids seem to be a promising option for researchers. As a result, numerous investigations have been undertaken to understand the behaviors of nanofluids. Since their discovery, the thermo-physical properties of nanofluids have been under intense research. Inadequa...

The potential of nanofluids for the improvement of heat transfer coefficient in various heat exchangeequipment has been considered and studied as a major application during recent decades. In this research,heat transfer coefficient of ZnO, TiO2 and ZnO/TiO2 nanofluids in a shell and tube heat exchanger has beenstudied experimentally. ZnO nanoparticle was synthesized through pre...

Fin-tube heat exchangers are widely used in air-conditioners and heat pumps, which are constructed with a lot of tubes. Refrigerant circuit of heat exchanger with numerous pipe can be constructed by many methods. Refrigerant circuit design is usually determined designer’s experience and case by case test without guides. The number of path affects largely on heat exchanger performance. In this p...

A heat exchanger network (HEN) for the process of methanol synthesis has been studied by combination of pinch design method and the application of “Twisted Tube” heat exchanger units as a new technology. The HEN is reconstructed based on the full utilization of maximum allowable pressure drops for the process hot and cold streams. An algorithm is developed to generate design procedure for twist...

Abstract In this study, we investigate the thermal behaviour of nanofluids in a double-pipe heat exchanger. It is about counterflow configuration, designed to cool lubrication unit thermoelectric power plant. The subject work evaluate performances exchanger by using nanofluid based on alumina suspension comparing with deionized water. order performance studied carried out numerical experiments ...

A wide variety of heating and cooling applications use heat exchangers. The increase in energy prices, the requirement for size reduction, restriction on greenhouse gas emissions has led to need finding ways develop efficient cost-efficient way enhance model a exchanger by visualizing effects design parameters is using Computational Fluid Dynamics (CFD). reason this exploration was lead an exam...