Performance Investigation Of Improved Box Type Solar Cooker With Thermal Energy Storage

Abstract

Using Solar Energy For Cooking Is A Quick Acting Solution To Overcome The Energy Scarcity And An Effective Mitigation Way For Concerning Global Climate Change, Deforestation, And Economic Problems Of The World?�?S Poorest People, Especially In The Solar Remote Areas. Thus A Wide Solar Remote Area, Daassanech Woreda, Is Selected For Study Which Is Located In Snnpr Of Ethiopia, About 780 Km Far From Addis Ababa, Near To The Boarder Of Both Kenya And Sudan. In Daassanech, All Domestic Energy Need Have Been Achieving By Biomass Only, Due To This Health, Environment And Other Social Related Problems Had Followed. The Main Aim Of This Study Is To Design, Develop And Experimentally Test The Performance Of Improved Solar Cooker With Thermal Energy Storage Under Daassanech Weather Condition. Then, The Thermal Performance Of Improved Solar Cooker Is Compared With Conventional Box Type Solar Cooker. The Weather Data Was Collected From National Meteorological Agency (Nma) Of Ethiopia Of Jinka Station And From Four Different Websites. An Average Solar Radiation Is Calculated As Maximum In February (6.563 Kw/M2/Day) And Minimum In July Month (5.578 Kw/M2/Day) And Annual Average Daily Solar Radiation Is 6.134 Kw/M2/Day. Based On Minimum Solar Intensity, Two Solar Cooking Systems Are Designed And Fabricated For Experimental Testing With Solar Intercept Area Of 0.25m2. Then Temperature Distributions Are Analyzed In Both Analytically And Experimentally. Experimental Study Was Carried Out In 9th To 15th June, 2019 By Using Two Different Methods, Stagnation Testing And Load Testing. Then Performance Has Explained In Both Bsi And Asae Standards. As Bsi Standard The Improved Cooker Is Included In Grade ?�?A?�? Due To First Figure Of Merits (F1) Is Greater Than 0.12. Based On Asae Standard Results, Improved Solar Cooker Without Tes Has Obtained Higher Power Than Others; Due To This It Is Able To Cook Food Faster Than Others. During Cooking Tests Improved Solar Cooker Was Able To Attain Above 100oc Temperature Of Water In Morning (8:20 ?�? 10:20) With Low Solar Intensity. The Black Stone With Its Better Specific Heat Capacity And Relatively High Conductivity Is Chosen As A Better Storage Material. The Payback Period Of Improved Solar Cooker When Compared With Firewood And Charcoal As Alternative Energy Source Is 2.5 Years. This Study Can Continue Further With Different Storage Materials, Additional System Modifications And With Different Locally Available Insulations In Various Weather Conditions.