Showing papers in "Applied Thermal Engineering in 2008"

TL;DR: In this paper, a review of the working principle of phase change materials and their applications for smart temperature-regulated textiles is presented, followed by an account of incorporation of PCM in the textile structure are summarized.

TL;DR: In this paper, various aspects of nanofluids including synthesis, potential applications, experimental and analytical studies on the effective thermal conductivity, effective thermal diffusivity, convective heat transfer, and electrokinetic properties are critically reviewed.

TL;DR: In this article, an analysis of regenerative organic Rankine cycles using dry organic fluids, to convert waste energy to power from low-grade heat sources is presented, and the evaluation for both configurations will be performed using a combined first and second law analysis by varying certain system operating parameters at various reference temperatures and pressures.

TL;DR: In this article, the use of phase change material (PCM)-based heat sink in transient thermal management of plastic quad flat package (QFP) electronic devices was investigated experimentally and numerically.

TL;DR: In this article, a critical discussion and a suitable tabulation is presented, on the basis of algebraic form of the coefficients and their dependence upon characteristic length and wind direction, in addition to wind speed.

TL;DR: In this article, two alternative approaches for the design of a dynamic model for an ORC to be used for control and diagnostics systems were proposed, based on moving boundary and discretization techniques, compared in terms of accuracy, complexity and simulation speed.

TL;DR: In this article, the reliability and performance of a domestic refrigerator with nanoparticles in the working fluid was investigated experimentally, and the results indicated that HFC134a and mineral oil with TiO2 nanoparticles works normally and safely in the refrigerator.

TL;DR: In this paper, a wallboard composed of a new phase change material (PCM) was investigated to enhance the thermal behavior of a lightweight internal partition wall, and an optimal PCM thickness value was calculated for use in construction.

TL;DR: In this article, the optimal capacity of a power generator for a residential CHP system is investigated, and once the unit has been installed, what dispatch strategy to use in order to minimize a customer's electricity and heat demands.

TL;DR: In this article, ethanol was used as fuel at high compression ratio to improve performance and to reduce emissions in a small gasoline engine with low efficiency, and it was determined from the experimental results that the most suitable fuel in terms of performance and emissions was E50.

TL;DR: In this paper, a procedure for optimal design of shell and tube heat exchangers is proposed, which utilizes a genetic algorithm to minimize the total cost of the equipment including capital investment and the sum of discounted annual energy expenditures related to pumping.

TL;DR: In this article, different possibilities to overcome the energy requirements by means of amine scrubbing integration into a commercial power plant, and presents a technical and economical analysis of the performance of these approaches.

TL;DR: In this article, an experimental study on the operational limitation of closed loop pulsating heat pipes (CLPHPs), which consist of a total of 40 copper tubes with 1mm and 2mm inner diameter, respectively, was presented.

TL;DR: In this paper, a plate-fin type Compact Heat Exchanger (CHE) is considered for optimization using a GA to search, combine and optimize structure sizes of the CHE.

TL;DR: In this article, the thermal performance of an inorganic eutectic phase change material (PCM) based thermal storage system for thermal management in a residential building has been analyzed by theoretical and experimental investigation.

TL;DR: In this article, the effects of nanoparticles volume fractions on the hydrodynamics and thermal parameters of a two-phase mixture model of a nanofluid are investigated.

TL;DR: In this article, preliminary experimental results on using copper tube having internal and external diameter with 2.4mm and 3mm, respectively, to carry out the experimental pulsating heat pipe were presented.

TL;DR: In this article, a case study of ground heat exchangers for a ground-coupled heat pump (GCHP) system is presented in Shanghai, China, where several types of vertical pile-foundation heat exchanger selected are intercompared to determine the most efficient one.

TL;DR: A short review on the micro and miniature heat pipes is presented in this paper, where the authors present a short review of the heat pipe design, definition and prediction of most simple cases, but even today heat pipes are not completely understood and solution strategies still contain significant simplifications.

TL;DR: In this paper, a study on nanofluids applications, such as a coolant in a diesel electric generator (DEG), is presented demonstrating a reduction in specific heat values with an increase in the particle concentration and an increase with temperature.

TL;DR: In this paper, a solar organic rankine cycle (ORC) engines for reverse osmosis (RO) desalination using currently available solar thermal collectors were modeled using the Aspen Plus process simulator.

TL;DR: In this article, numerical investigation of a counterflow heat and mass exchanger used in the indirect evaporative dew point cooling systems, a potential alternative to the conventional mechanical compression air conditioning systems, was carried out to optimise the geometrical sizes and operating conditions of the exchanger in order to enhance the cooling (dew point and wet bulb) effectiveness and maximize the energy efficiency.

TL;DR: In this paper, the authors demonstrate the successful application of GA combined with back propagation neural networks (BP) for the optimal design of plate-fin heat exchangers (PFHE).

TL;DR: In this paper, a cylindrical module of 88 mm of diameter and 315 mm height with external vertical fins of 310 mm height and 20 and 40 mm length was used to determine the heat transfer coefficient by natural convection.

TL;DR: In this article, the design of a modular compression ignition free-piston engine generator, applicable to electric power generation in large-scale systems, is described, and extensive simulation results are presented, giving insight into engine operating characteristics and performance.

TL;DR: In this paper, a cogeneration system that produces 50 MW of electricity and 15 kg/s of saturated steam at 2.5 bar is optimized using exergoeconomic principles and evolutionary programming.

TL;DR: In this paper, a tube-in-shell thermal energy storage system with three kinds of paraffin with different melting temperatures is analyzed experimentally, and the effects of the Reynolds number and the Stefan number on the melting and solidification behaviors are determined.

TL;DR: In this paper, the performance parameters and exhaust emissions of a diesel engine fuelled with diesel fuel and a biodiesel, namely cottonseed oil methyl ester (COME), subjected to preheating at different temperatures in order to lower its viscosity have been investigated.

TL;DR: In this paper, a comprehensive model was developed to investigate the effect of filling ratio on the steady-state heat transfer performance of a two-phase closed thermosyphon (TPCT).

TL;DR: In this paper, the authors report on heat transfer enhancement and the corresponding pressure drop over a flat surface equipped with square cross-sectional perforated pin fins in a rectangular channel, and the experimental results showed that the use of the square pin fins may lead to heat transfer enhancing.