Abstract
The purpose of this research is to design an energy-efficient off-grid vending machine that has a refrigeration system powered by an environmentally friendly refrigerant. The paper presents details from the equipment’s design phase in terms of the resistance structure, photovoltaic panels area dimensioning, but also in terms of the necessary cooling load to be provided by the refrigeration system. The refrigerant chosen was R290 following a comparative analysis, which showed that it has an efficiency 6.6% higher than R134a. During the monitoring periods, the outdoors temperature varied between −4–28 °C, the relative humidity between 22–100% and yet only a slight indoor temperature variation of ±1.5 °C compared to the set value was recorded. The battery module managed to store enough energy from the photovoltaic panels to keep the vending machine functional through three consecutive days with adverse environmental conditions, as evidenced by the low variation of indoor temperature
Funder
European Regional Development Fund by Operational Program Competitiveness
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference38 articles.
1. Vending machine assessment methodology. A systematic review
2. Availability, Nutritional Profile and Processing Level of Food Products Sold in Vending Machines in a Spanish Public University
3. Globe Newswirehttps://www.globenewswire.com/news-release/2020/03/25/2006076/0/en/Global-Connected-Vending-Machines-Market-Report-2019-to-2024-4th-Edition.html#:~:text=There%20are%20about%2015%20million,8.9%20million%20units%20by%202024
4. EU GPP Criteria for Food Procurement, Catering Services and Vending Machines, Final Technical Report of the European Commissionhttps://ec.europa.eu/environment/gpp/pdf/190927_EU_GPP_criteria_for_food_and_catering_services_SWD_(2019)_366_final.pdf
5. https://ecofriend.com/solar-energy-powers-awesome-vending-machines.html
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