| This paper proposes a circulating system for a steam jet refrigeration system that does not require mechanical power. In this system, the liquid from the condenser is fed to the boiler by means of the boiler pressure and gravity force. This feeding system was tested separately. It was found that the heat input to the boiler was relatively similar to the one in a conventional system using a mechanical pump. The steam jet refrigerator employing this workless boiler feeding system was also tested. It was shown that this system gave a similar COP to that from a system using a mechanical pump. |