Thermoelectric-Powered Remote Sensor for Frost Detection

Abstract

This article proposes the use of a thermoelectric system as an energy-harvesting device for use in industrial refrigeration units. The energy generated by the device in this study can be used for remote, low-power applications, such as frost detection sensors. The accumulation of frost on the surfaces of evaporators causes inefficiency in the operation of refrigeration units by reducing the heat exchange rate. To revert this condition, the evaporator must be defrosted periodically. The proposed energy-autonomous sensors can be localized in key places to minimize not only the number of defrosting operations but also their duration. These sensors can transmit data wirelessly so that the control systems can better determine the ideal time to perform defrosting operations. This device eliminates the need for complex cable routing in long systems, where these components are often located far apart or in hard-to-reach places. The outcomes of this research not only offer solutions to a prevailing issue in refrigeration units but also aid in formulating strategies for optimally placing ice formation detection sensors. Additionally, these findings may boost overall refrigeration efficiency while cutting down on installation and maintenance costs.