Experimental Characterization of a Dual-Module Thermoelectric Cold Storage Unit for Off-Grid Applications
Year: 2026
Type: article
Abstract: Post-harvest losses of perishable food commodities remain a critical challenge in Pakistan, where inadequate cold-chain infrastructure and unreliable electricity supply contribute to losses of 30–40% before products reach consumers. This study presents the design and experimental characterization of a compact dual-module thermoelectric (TEC) cold storage unit for off-grid food preservation applications. The system was designed using two Laird CP2-12706 bismuth telluride TEC modules within a polyurethane-insulated enclosure. Experimental evaluation covered fan performance, closed-door steady-state operation, door-opening infiltration response, and fin thermal behavior. Hot-side fan power was found to strongly influence cooling performance, with the dual-module configuration achieving a minimum chamber temperature around 24 °C under typical summer ambient conditions and maintaining a stable temperature approximately 10 °C below ambient during prolonged closed-door operation. Relative humidity stabilized above 90% RH, and periodic door openings produced negligible sustained temperature rise with rapid recovery. Fin temperature measurements confirmed effective heat rejection during operation but indicated limited passive cooling retention following power interruption. The results demonstrate the technical feasibility of a compact dual-module TEC system for decentralized off-grid cooling and provide an experimental basis for future performance enhancement through thermal energy storage integration.
Source: IEEE Access
Authors: Muhammad Uzair Yousuf, Abdulaziz Alasiri
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,075
OpenAlex ID: W7169787343