Heat pipe heat exchangers (HPHEXs) are widely used in various industries. In this paper, a novel model of liquid–liquid exchanger countercurrent manner is established by considering the evaporation and condensation thermal resistances inside pipes (HPs). The discrete method added to HPHEX determine HPs temperature change trend transfer fluid HPHEX. verified structure experimental data existing ...

Title of Document: DEVELOPMENT OF MULTI-SCALE, MULTI-PHYSICS, ANALYSIS CAPABILITY AND ITS APPLICATION TO NOVEL HEAT EXCHANGER DESIGN AND OPTIMIZATION Omar Abdelaziz Ahmed Abdelaziz, Doctor of Philosophy, 2009 Directed By: Reinhard Radermacher, Professor Department of Mechanical Engineering Heat exchanger development using enhanced heat transfer surface designs and optimization techniques is a c...

A mathematical model predicting the oscillating motion in an oscillating heat pipe is developed. The model considers the vapor bubble as the gas spring for the oscillating motions including effects of operating temperature, non-linear vapor bulk modulus, and temperature difference between the evaporator and the condenser. Combining the oscillating motion predicted by the model, a mathematical m...

China is the birthplace of the Chinese Medicine. Ganoderma lucidum as a traditional Chinese treasure with Millenium history of medicinal herbs, its medical and health care functions have come to be known to the general public. With the development of technology, G. lucidum health food ceaseless emerges in large numbers. But G. lucidum health food differs in efficacy, component, and content; hea...

This paper shows the research work on heat exchanger using nano fluid. In this paper we are using compact heat exchanger as heat transferring device while Al2O3 as a nano fluid. The effect of the nano fluids on compact heat exchanger is analyzed by using ε –NTU rating numerical method on turbo-charged diesel engine of type TBD 232V-12 cross flow compact heat exchanger radiator with unmixed flui...

The aircraft environmental control system (ECS) is a critical aircraft system, which provides the appropriate environmental conditions to ensure the safe transport of air passengers and equipment. The functionality and reliability of ECS have received increasing attention in recent years. The heat exchanger is a particularly significant component of the ECS, because its failure decreases the sy...

Articles you may be interested in Chemiluminescent reactions in a heat‐pipe oven Th~ pr~ss.ure, density, .and velo~ity .distributions within a cylindrical heat-pipe oven are analyzed for I~VISCld: compressible flow m either the radial or axial direction. For sufficiently large but readdy attamable heat flows, density variations within the heat pipe as large as 50% which can lead to inaccuracies...

In air-cooling applications with frost production, heat exchanger performance is often air-side limited, because the two-phase flow of the refrigerant provides excellent heat transfer coefficients, and because designers typically use a large air-side fin spacing for frost tolerance. The large fin spacing prolongs operation of the heat exchanger by mitigating the effect of the accumulating frost...