Analysis of the effects of use of thermal energy storage device (TESD) in solar air heater

In this research work a setup is designed to incorporate Lauric acid as a phase changing material (PCM) in a solar air heater. This phase changing material (PCM) is carefully selected based on the application and manufacturing constraints. A thermal energy storage device (TESD) is manufactured and incorporated in solar air heater and experiments were carried out to compare the solar air heater with and without thermal energy storage device (TESD) to evaluate various parameters such as output temperature and pressure drop. Results revealed that the rise in the output air temperature decreases from 8.67 K to 4 K with the increase in the mass flow rate of air flowing through the solar air heater from 0.021 kg/s to 0.035 kg/s. Also with an increase in the mass flow rate, there is a decrease in the friction factor from 0.0119 to 0.00802. There is an average increment of 86.47% in the rise of output air temperature with TESD as compared to rise of the output air temperature without TESD with an average increment of 36.47% in friction factor. A computational analysis is also performed which gives insight into the working of solar air heater with thermal energy storage device (TESD). A computational domain of solar air heater with TESD is analyzed in CFD code FLUENT using various turbulence models such as k-ω SST, k-ω Standard, k-∊ Standard and k-∊ RNG. It is observed that results obtained from turbulence model k-є RNG model are in good agreement with the experimental results and hence used for the analysis of all the cases considered in this work. Keywords: Phase changing materials, Heat transfer, Energy storage device, Solar air heater, Friction facto

Haematological changes in naturally infested dairy animal at central zone of vidarbha

A total of 2288 faecal samples collected from dairy animal of central zone of vidarbha region (Maharashtra) from July 2002 to June 2003 revealed 62.98% prevalence of helminthic infection. Paramphistomum sp. were predominant (12.28%) fallowed by Toxocara (10.97%). The percentage prevalence ofmonezia strongyloides , Haemonchrus, Fasciola Schistosoma, Trichuris, Oesophagostmum and Trichostongylus species were 8.96%, 6.99%,5.98%,3.81%,1.87%,1.00%, 0.96% respectively. The overall prevalence of nematode, trematode, cestode and mixed type of helminth infection was 41.63, 11.11 0.98 and 46.28 percent respectively. The helminth infection was most common encountered during and after rainy seasons. The infected animals showed significant reduction in Hb, PCV,TLC,TEC, neutrophils while lymphocytes and monocytes count did not significant. [Veterinary World 2008; 1(2.000): 47-48

Efficacy of Doramectin and Fendendazole against naturally infected dairy animals with parasites at central zone of vidarbha region of Maharashtra State

Comparative efficacy of doramectin and fenbendazole was studied against naturally infected dairy animals with helminth parasites showing clinical symptoms such as rough body coat, emaciation, diarrhoea and weakness etc. Based on the number of days taken for clinico-parasitological cure and the mean reduction EPG, doramectin was found to be superior to fenbendazole. [Veterinary World 2008; 1(4.000): 101-102