Renewable Energy Research

Solar Cooling Experimental

Developing a simple solar cooling system (Active carbon-methanol adsorption cooling and heating system)

A flate plate solar collector with area of 1.79 2 m was used to develop a solar adsorption cooling and heating system. The working pairs consists of methanol (methylalcohol) as a refrigerant and activarted carbon as the adsorption medium. A water tank was used to store water which is used to supply water which will cool the system at night and in parralel will cause the temprature of water in the tank to rise. The experimental results showed that the system is capable to decrease the average temprature of water by 3 C in 40 minutes. Meanwhile the system has been able to increase the average temprature of water in the water tank by 3.7 C in a period of 40 minutes at night. The results were succesfull but not efficient and future recommendations have been developed which will increase the efficiency of the system in the future and will help in the purpose of commercialzation.

Solar PV driven Cold Storage
Design and Data Acquisition

Two-tank based solar compression cycle system that cools a tank and heats the other simultaneously. The system consists of Four flat PV solar collectors were used to power a vapor compressor refrigeration via an inverter and a MPPT. The tanks were designed according to fluid heat convection physics and solar technology. The tanks were insulated using Polyurethane foam from all four sides of the tanks. Each tank was designed with two inlets and two outlets but for the purposes of this small scale experimental project the tanks' design was modified to have one inlet and one outlet each. The system did not have batteries sufficient to carry the load and power the vapor compressor refrigerator motor which could be the next step for further enhancing the system and carrying the project forward. Only the AC performance testing was carried out of the system and then therefore eventually should be compared with the results done by other engineers using batteries and powered by the PV plates.