The Optimization Model of Effective Thermal Conductivity for Metal Hydride Heat Pump of Refrigeration Cycle

نویسندگان

  • Heyinan Zheng
  • Kuan-Ting Lin
  • Sang-chul Bae
  • Masafumi Katsuta
  • Heyinan ZHENG
  • Kuan-Ting LIN
  • Sang-chul BAE
  • Masafumi KATSUTA
چکیده

The main challenge for the practical application of metal hydride heat pump (MHHP) is the relatively poor system performance, which is mainly caused by the undesirable heat transfer performance of reaction bed. However, there is no significant improvement of system performance when enhancing the effective thermal conductivity (E.T.C) of reaction bed. In order to identify the relationship between the E.T.C and system performance, a numerical model has been carried out first in this research. The effect of E.T.C on cooling temperature, cycle time, the coefficient of performance (C.O.P) and cooling power is investigated according to the numerical results, which indicate that the variation trend of C.O.P and cooling power is opposite when E.T.C increasing. There therefore exists an optimum value of (E.T.C), which is 0.7-0.8 W/mK in this research. The experimental confirmation is conducted eventually, and the comparison of results shows a reasonable agreement with an acceptable error range.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Optimization of thermal curing cycle for a large epoxy model

Heat generation in an exothermic reaction during the curing process and low thermal conductivity of the epoxy resin produces high peak temperature and temperature gradients which result in internal and residual stresses, especially in large epoxy samples. In this paper, an optimization algorithm was developed and applied to predict the thermal cure cycle to minimize the temperature peak and the...

متن کامل

Models for metal hydride particle shape, packing, and heat transfer

A multiphysics modeling approach for heat conduction in metal hydride powders is presented, including particle shape distribution, size distribution, granular packing structure, and effective thermal conductivity. A statistical geometric model is presented that replicates features of particle size and shape distributions observed experimentally that result from cyclic hydride decrepitation. The...

متن کامل

An Empirical Correlation for Estimation of the Thermal Conductivity of Saturated Liquid Refrigerants

Thermodynamic data on environmental refrigerants have attracted considerable interest in the optimization and design of heat compressors, exchangers and other refrigeration equipment. In this study, An optimization algorithm was used to obtain the constant parameters of the new empirical model by fitting them to the source databank. The model was used to calculate the constant coefficients of t...

متن کامل

A Simple Equation for the Thermal Conductivity of Saturated Vapor Refrigerants

The ability of a material to supply heat by means of conduction is called thermal conductivity, which is defined by Fourier's equation. Thermodynamic data on environmental refrigerants have attracted considerable interest in the design and optimization of refrigeration equipment, such as heat compressors and exchangers. After analysis of statistical effects, a new simple correlation was develop...

متن کامل

Theoretical analysis of a novel combined cooling, heating, and power (CCHP) cycle

This study presents a theoretical analysis of a new combined cooling, heating, and power cycle by the novel integration of an organic Rankine cycle (ORC), an ejector refrigeration cycle (ERC), and a heat pump cycle (HPC) for producing cooling output, heating output, and power output simultaneously. Three different working fluids—namely R113, isobutane, and R141b—have been used in power, ref...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2016