Volume No. 6 Issue No.: 4 Page No.: 1059-1065 April-June 2012

 

AN EXPERIMENTAL INVESTIGATION ON THERMOELECTRIC REFRIGERATION SYSTEM : A POTENTIAL GREEN REFRIGERATION TECHNOLOGY

 

Manoj Kumar Rawat*1, Lal Gopal Das1, Himadri Chattopadhyay2 and Subhasis Neogi

1. Central Mechanical Engineering Research Institute (CSIR-CMERI) Durgapur, (INDIA)
2. Department of Mechanical Engineering, Jadavpur University Kolkata, (INDIA)
3. School of Energy Studies, Jadavpur University Kolkata, (INDIA)

 

Received on : March 05,2012

 

ABSTRACT

 

Conventional refrigeration systems use ChloroFluoro Carbons (CFCs) and Hydro Chlorofluorocarbons (HCFCs) as heat carrier fluids. Use of such fluids in conventional refrigeration systems has a great concern of environmental degradation and resulted in extensive research into development of novel refrigeration technologies. Thermoelectric Refrigeration (TER) has emerged as a promising refrigeration technology due to their distinct advantages. The research and development work carried out by different researchers on novel TER system is thoroughly reviewed in this paper. The present group of authors is also conducting research for development of thermoelectric refrigeration system powered by solar photo voltaic (PV) cell generated DC voltage which will be suitable for Indian climate conditions and applicable for rural health centres. Researchers developed first prototype of TER system with a refrigeration space of 1000 cubic centimeter (1Liter) by using four numbers of Peltier module (Qmax=19W) and four numbers of Heat sink fan assembly with thermal resistance of 0.50 °C/W to increase heat dissipation rate. Experiments were conducted on developed prototype of thermoelectric refrigeration system and result shows a temperature reduction of 11.5°C in refrigeration space with respect to 30°C ambient temperature.

Symbols:

COP

Coefficient of performance

DC

Direct Current

I

Electric Current, Ampere

K

Thermal Conductance, W/K

PV

Photo voltaic

Q<sub>c</sub>

Rate of heat absorbed at cold junction, Watt

R

Electrical Resistance, &OMEGA;

TER

Thermoelectric refrigerator

TEC or TEM

Thermoelectric cooler or thermoelectric Module

T<sub>h</sub> 

Hot Junction temperature, Kelvin, &deg;C

T<sub>c</sub> 

Cold Junction temperature, Kelvin, &deg;C

W

Input Electrical Power, Watt

Z

Figure of merit, 1/K

&alpha;<sub>pn</sub> 

The difference between the absolute Seebeck coefficient of p and n

 

material, V/K

&rho;

Thermoelectric material Electrical Resistivity, &OMEGA;.m

&lambda;

Thermoelectric material Thermal conductivity, W/(m.K)

&alpha;

Thermoelectric material Seebeck coefficient, V/K

 

Keywords : Thermoelectric Refrigeration (TER), Peltier effect, Figure of merit, Coefficient of Performance (COP), Chloro Fluoro Carbons (CFCs)

 

 

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