Abstract: A fluid flow system comprises a first pump and an ejector downstream of the pump. The first pump facilitates the flow of a driver fluid through the ejector. In the ejector, the driver fluid mixes with a suction fluid. The ejector is operatively coupled to a fluid reservoir, which in some cases is associated with a cycle having a second pump and an evaporator. The fluid reservoir includes the suction fluid. A heat exchanger downstream of the ejector removes heat from the driver fluid, and from the heat exchanger the driver fluid is directed to the first pump. The fluid flow system can include a fluid separator downstream of the ejector for separating the driver fluid from the suction fluid.

Abstract: Provided herein is a vapor absorption system, adapted to receive a vapor comprising a vacuum pump having an operating liquid, where the vapor is received by an operating liquid and condensed therein to provide condensed liquid mixed with the operating liquid.

Abstract: A boat formed from a flexible hull bottom and side skirts in the form of tapered inflatable tubes. The side skirts are fastened to the hull bottom by flexible adhesive tape or other continuous flexible mechanical fasteners so that there are no hard fastenings or frames to cause stress concentration in the flexible hull bottom.