Eco-Friendly Refrigeration Test Rig works on simple vapor compression refrigeration cycle. New Anucool Engineers offers Eco-Friendly Refrigeration Test Rig. New Anucool Engineers is the supplier of a wide range of Water Chiller, Printing Chiller, Oil Chiller. Eco-Friendly Refrigeration Test Rig uses R134a as a refrigerant. The system is fabricated such that students can observe and study vapor compression cycle, its component principle and working. The arrangement of parts is made in an easy way so that, all the parts are visible and working can be easily understood.