Technologies

Hybrid solar/wind power system with multi-compartment refrigerators

Posted by: Fabrizio Leonforte

Modified date: 10/09/2017

Hybrid solar/wind power system with multi-compartment refrigerators

Categories

Technology field of reference: Preservation, Powering

Relevant sectors: Nutrition, Food Security, Health, Environment

Availability: National


Technology Description

This solution is a simple microgrid – powered by photovoltaic panels and a wind turbine – proving energy to 7 refrigerators, each of them with 8 lockable compartments. It was installed by a local company with components already available on the Lebanese market. The electrical system is composed by 24 photovoltaic panels (260 W each one, totally 6.2 kW), a 2.5 kW wind turbine, a 40 kWh battery bank, charge controllers, inverters, isolators, circuit breakers and other devices to protect the system’s and users’ safety. A real-time monitoring system collects data about power generation and consumption, and share them online through a dedicated web platform. Every refrigerator has a total capacity of 700 l, thus about 85 l per each of the 8 lockable compartments. Every refrigerator was designed to have a power absorption of 350 W, and a maximum power consumption in standard testing conditions (STC) of 3,600 Wh/day. They were supposed to be equipped with eutectic plates for static cooling (i.e. to keep the internal temperature constant for some hours in case of energy shortage). Actually, these technical requirements could not be fully tested on the field. This solution is innovative because: 1) the electrical system is completely based on renewable sources, combining the characteristic of both solar and wind energy; 2) refrigerators are design to work in hard conditions, including shortage of power; 3) refrigerators have compartments to guarantee a safe and personal use to a large number of households: they combine benefits of both a community installation and a device used at the household level; and 4) the entire system is tailored to successfully integrate the loads (i.e. refrigerators) with renewable energy sources, minimizing the drawbacks.

Location

Lebanon

Year of implementation

2014


Fuel/Energy

Electric energy

Manufacturer

Local company