IN IN1111KO2013A
A hybrid thermoelectrically cooled/heated back-packed air circulating helmet system and a method for predicting the performance of such a back- pack helmet system using computational fluid dynamics (CFD) analysis are disclosed. The system comprises: a hybrid heat sink unit with thermoelectric (TE) module (TEC), small fans, blower, rechargeable battery with charger to be carried as back pack and an electrical switch fixed with waist belt. The method for predicting the performance of a back-pack helmet system involves: choosing volume flow rate value for the blower matching cold plate pressure drop from given blower characteristics; performing similar procedure for hot side fan; calculating corresponding cold plate outlet temperature matching TEC module input power requirements; predicting mean baffle temperature; calculating corresponding heat transfer coefficient value; using the calculated heat transfer coefficient for predicting new coefficient for different values of blower and hot side fan volume flow rate; and calculating values of temperature at the hot side of TEC module and total heat dissipated from hot side.
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