Analysis of Different Cooking Pots in Box Type Solar Cooker with Outer Reflectors

This paper presents a research on the box type solar cookers, with an analysis of different cooking pots i.e. finned and un-finned cooking pots. In this study, a box type solar cooker was fabricated and tested under Lucknow city (Uttar Pradesh) prevailing climate conditions. The presented cooker is the box type solar cooker with four aluminum foil reflectors. The testing was conducted at Lucknow city in Kirti Solar Limited. The two pots are identical in shape and volume, with one of the pots external surface provided with fins. The result of two tests of water heating , revealed that Test.1 held on 7th April with 1 Liter of water was raised to 94°C in 112 and 124 minutes for finned and un-finned cooking pot respectively. These figures represent 9.6% reduction in heating time. Similarly Test 2 help on 5th may with 1 Liter of water was raised to 94°C in 97 minutes and 114 minutes for the finned and un-finned cooking pots respectively. And these figure represent 15% reduction in heating time. This clearly demonstrates that fins improved the heat transfer from the internal hot air of the cooker toward the interior of the pot where the water to be heated in different periods of months.