Abstract
In this article, waste fat deriving from the cooking process of pork sausages has been studied as a sustainable phase change material (PCM). The waste fat is composed of saturated and unsaturated fatty acids and presents melting point and melting enthalpy values of 32 °C and 20 J/g respectively. The BioPCM was confined in two different hosts, namely (i) biosilica (diatomite) and (ii) polypropylene non-woven mat coming from surgical mask filter waste. Both hosts are effective in entrapping high quantity of BioPCM (i.e. 65-75%) maintaining its physical and thermal properties. A simplified analytical model has been developed to analyze the use of the BioPCM in building passive cooling application simulating the thermal behavior of a building wall containing the BioPCM confined in the hosts. A transmitted thermal power per unit area of 10.2 W/m2 was obtained. This value is 37% less of transmitted thermal power calculated for the wall without the BioPCM (16.2 W/m2), confirming that waste cooking fat can be an effective eco-sustainable solution in a good practice of circular economy.
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