| Popis: |
This paper describes the review of previous studies on experimentation and simulation of solar PV panel-based vaccine refrigerator and performance evaluation in different part of the world. In India, there are many regional places where electrical power is not available therefore vaccine preservation is challenge and due to this, people are losing their life. Solar PV based solution would help us to resolve this challenge in India. In South Africa, electricity availability and refrigeration need is a challenge. In techno –economic assessment study, they carried out AC operated refrigerator and DC operated refrigerator with Solar PV based electrical supply and observed that AC refrigerator has relatively high-power consumption in comparison with DC refrigerator. In one of the review paper, they studied the lessons learned across many countries in solar refrigeration units sold by WHO and the outcome of study was for sustainable financing mechanism and incentives, long term maintenance and repair is required. Also, the system design to be carried out with solar experts as well as installations to be done by well trained technicians. The keys to success included the use of WHO PQS prequalified approved equipment supplied by qualified vendor and installation done by well trained technicians. Battery failure in Senegal from 1993 to 2002, @34 villages of the region of Senegal were equipped with photovoltaic powered systems in health centers. 9 of those installations included refrigerators. The proper planning and well training to the technical professional would help to maintain proper caring of all the installed units and those have resulted in a good condition after 5 years later. A PV system set up with a refrigerator having 25 mm PU foam insulation thickness, min. 320 W panel capacity along with 50 Ah battery capacity and with 50 mm insulation, 200 W panel is capacity is enough. In both combination, unutilized power is not used by the system in the peak sunny days. With the change in AC compressor motor to DC compressor, inverter is not required and load on the PV panel would be less. In case of AC refrigerator, power surges of magnitudes 250-425 W during cycling whereas in case of DC refrigerator, power surges of less than 75 W. With the previous learning on Solar refrigerators failure across many places in the world, recommendation is to plan properly initial and recurring investment for the future, also allow only professional system designers, Plan for perfect installation and repair services and closely monitor the cooling performance of the solar refrigerator. With the help of solar tracking system, the best possible power from PV system can be produced from sunshine to sunset. |
