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Indoor Solar Cooking system with “Thermal Batteries in composite matrix structure”

Principal Investigator Dr Ajay Chandak

Project Funded by InSIC

Project Brief: 

There are many designs of solar cookers which are capable of cooking food. However these solar cookers have serious limitations. Most of them can be used only when Sun is shining and have operating inconvenience due to outdoor operation; and hence acceptance of solar cooking at global scale is miniscule. Current innovation addresses these limitations. It provides solar PV panel as a source which can be installed outside the house and cooking can be done indoors. Main innovation is a pot shaped composite matrix thermal battery which stores solar heat throughout the day when Sun is shining and can be used at convenient time by the cook. Provision of using insulated cooking pot itself as a thermal storage makes the system extremely energy efficient. Composite matrix thermal battery stores sensible heat without any chemical or physical phase change and will practically have unlimited life. System has no moving parts, no chemical or physical phase change and hence practically no maintenance; except cleaning solar panel. Main innovation is a development of composite matrix thermal storage with expensive material like aluminium, encapsulating inexpensive material like concrete and granite. Both materials have high specific heat storage capacities and are capable of storing large amount of heat in small volume. Innovation tries to combine cost effectiveness of concrete or granite with high thermal conductivity of aluminium to bring down overall cost of thermal battery by 75%, making it financially viable solution.