IJRTEM

This study focuses on an experimental study of hydrocarbon blend of isobutene (R-600a) and propane (R-290) as an environment friendly refrigerators with zero ozone depletion potential (ODP) and very low global warming potential (GWP), to replace conventional refrigerators tetrafluoroethane R-134a in a domestic refrigerators. The performance is observed for a domestic refrigerator by using blend of hydrocarbon R-600a and R-290 and its performance is compared with R-134a without change in original system. Due to the higher value of latent heat of hydrocarbons the amount of refrigerant charge required found to be reduced as compared with hydrofluorocarbon R-134a. Comparative performance study shows refrigerating effect is improved by using hydrocarbon blends, reduction of 35-40% in the refrigerant charge, the energy consumption per day reduced by 5-10%.

The earths inside temperature is commonly higher than the outside air temperature in winter and lower in summer so it can makes the use of the earth convenient as warm source or cold sink respectively. Earth air heat exchanger can contributes to reduce in energy consumption. Numbers of research have been carried out on Computational Fluid Dynamics analysis of EATHE systems and still it requires optimum redevelopment. In the present work a 3D CAD model was developed for CFD analysis of earth air tube heat exchanger (EATHE) system. The obtained simulated results were compared with experimental results obtained from experimental setup installed at Bhopal situated in Central India. The temperature of earth at a certain depth about 2 m to 3 m of ground remains nearly constant throughout the year this constant temperature is called the undisturbed temperature of earth. The performance evolution was carried out to check the effect of pipe length, air flow velocity, depth of buried pipe and pipe diameter of EATHE system for summer cooling. The result shows that this system is more convenient only for summer cooling and not suitable for winter heating.

In this paper we have discussed the vital role of political stability on the link between macroeconomic variables and FDI .For this purpose we have used a data of year 1991 to 2011.In this empirical analysis we have used ADF test for the checking the stationary of the data and other software's are SPSS and eviews.This result of this study have made sure that import ,BOP, export and GDP growth rate have significant impact on the FDI inflows in the Pakistan and inflation has a negative impact on the FDI based on this research has proved that political stability is crucial for the expansion of foreign direct investment.

The displacement response of different masses of half car model. The analysis has been done for different car models also to see the dynamic response of the driver body coupled with the seat of a vehicle. It has been assumed the driver body is rigidly coupled with seat of the vehicle. The vehicle has been modeled for two D.O.F, in two D.O.F Half car model two motion (Pitch and Bounce) have been considered. The response of the vehicle has been obtained for different velocities and different amplitudes sinusoidal bump excitation.

This research is based on modifying the piston bowl. Button stud type bowl which increases the compression ratio which is one of the vital parameters controlling the complete combustion. Brake Thermal Efficiency, SFC HC,CO,Smoke level are improved significantly.