Abstract: A fluid delivery system for e.g. a vehicle includes a tank for holding fluid product, such as propane, a pump for pumping the fluid product from the tank, the pump being driven by hydraulic fluid, and a heat exchanger for using the fluid product to cool the hydraulic fluid. The heat exchanger also causes the fluid product to increase in temperature. The heated fluid product is returned to the tank, in the form of a vapor, for example. Embodiments of the invention provide a number of advantages, including increased pump flow rates, reduced cavitation and increased pump life, and elimination of a heat-exchanger fan.

Abstract: Apparatus for controlling temperature within a housing (200) comprises a thermal storage device (102) for maintaining a controlled temperature within the housing, and a thermal transfer arrangement (104) for selectively transferring heat between the thermal storage device and the external environment so as to effect thermal storage in the storage device, the thermal storage device comprising a thermal storage medium which is in direct contact with the thermal transfer arrangement. A further aspect of the invention is disclosed, in which a plurality of thermal storage devices are provided, each one being separate from the other such devices.

Abstract: A cooling system for passively cooling an enclosure incorporating at least one inclined heat pipe having an evaporator side extending within the enclosure and a condenser side extending outside the enclosure in contact with the ambient environment. A thermal storage device within the enclosure is configured having a first portion extending adjacent the evaporator side of the heat pipe and a second portion extending within, and generally concentric with, the evaporator side of the heat pipe. A solid-to-liquid phase change material is sealed within this thermal storage device such that this material changes to a liquid upon the absorption of heat. To further enhance the transfer of heat from within the enclosure to outside the enclosure, a series of fins can be added to the first portion of the thermal storage device as well as to the condenser side of the heat pipe.