A microchannel-type aluminum heat exchanger and a method of manufacturing the same, in which a heat-exchange tube is of a microchannel-type so as to improve the efficiency of heat exchange and the microchannel-type heat-exchange tube is wound in a coil-spring shape so as to reduce the volume thereof and the area required for installation, compared to a conventional heat exchanger, thereby improving utilization of space, and in which the heat exchanger, which is composed of the coil-spring-shaped heat-exchange tube, is not provided with a header in order to simplify the structure thereof, thereby improving productivity and economic efficiency owing to reduced manufacturing costs.

A vaporizer for heating a liquid phase fuel, the vaporizer comprising a reservoir having a least one wall for containing a liquid and a heat-conducting fluid within the reservoir. A heating core extending into the reservoir such that the heating core is in fluid contact with the heat-conducting fluid and the heating core has an inlet through which the liquid phase fuel will flow and an outlet through which the vaporized liquid phase fuel will flow. A heating passage having at least one open end extending at least partially within the reservoir such that at least a portion of an exterior surface of the heating passage is in fluid contact with the heat-conducting fluid. A heat source communicating with the open end of the heating passage to heat the heating passage, which in turn heats the heat conducting fluid and the liquid phase fuel within the heating core to vaporize the liquid phase fuel.

A system for selectively heating and cooling including a three-way heat exchange apparatus, a source apparatus for selectively heating and cooling a source fluid, a phase change material for selectively storing heating and cooling potential, and a distribution apparatus for selectively distributing heating and cooling a distribution fluid, wherein the three-way heat exchange apparatus is connected to the phase change material by an interface between the heat exchange apparatus and the phase change material.

When, out of adjacent two in a stacking direction of heat transfer plates, one heat transfer plate provided in front of the other heat transfer plate is referred to as a first heat transfer plate and the other heat transfer plate provided in rear of the one heat transfer plate is referred to as a second heat transfer plate, a header portion of each of the first heat transfer plates and a corresponding header portion of each of the second heat transfer plates partly form a non-flow path region where the header portions are in contact with each other not to allow fluid to pass through the non-flow path region. A peripheral edge part in the non-flow path region of each of the first heat transfer plates includes a convex portion projecting upward, and a peripheral edge part in the non-flow path region of each of the second heat transfer plates includes a concave portion recessed downward. A space of the convex portion and a space of the concave portion are stacked on each other in the stacking direction to define a cavity, and a communication port through which the cavity communicates with outside is provided at plate portions defining the cavity.

A heat transfer device configured to be independently fixed and densely mounted. The heat transfer device includes: a main body formed of a metallic material and forming a tube sealed to maintain a vacuum therein; and a thermally conductive layer having elasticity and adhered around the main body.

A baffle for a furnace of a heating, ventilation, and air conditioning (HVAC) system includes a mounting flange configured to be secured to a housing of the furnace. The baffle also includes a first panel extending from the mounting flange into an air flow path extending through the furnace and a second panel extending from the first panel toward the housing.

A heat exchanger provides indirect heat transfer between a first fluid and at least one second fluid. The heat exchanger comprises a jacket which encloses a jacket space for accommodating the first fluid and a tube bundle arranged in the jacket space and having a plurality of tubes for accommodating the at least one second fluid, the tubes forming multiple tube layers, and a shroud arranged in the jacket space and encloses an outermost, tube layer of the tube bundle. Spacers extending along the longitudinal axis are arranged between the shroud and the outermost tube layer, an interspace is present between any two spacers adjacent in the circumferential direction of the shroud, and between the shroud and the uppermost tube layer. A flow obstruction is arranged in the respective interspace and is designed to prevent or suppress a flow of the first fluid in the respective interspace, at least over a part section thereof.

Energy storage and retrieval systems are disclosed, along with methods of storing and retrieving the energy. The systems include an energy storage system and a trilateral cycle. The energy storage system includes low- and high-temperature energy storage tanks storing one or more energy storage media that exchange heat with a working fluid in both a gradient heat exchanger and a substantially isothermal heat exchanger in the trilateral cycle. Pressure changing devices transport the energy storage medium/media between the storage tanks and through the heat exchangers. The working fluid rejects heat to the energy storage medium and drives a turbine when the system is charging, and the energy storage medium rejects heat to the working fluid when the system is discharging. In some embodiments, the energy storage medium drives a second turbine when the system is discharging.

A heat exchanger for use in high pressure environments, such as in a gas turbine engine, includes an outer casing, a tubular element within the outer casing and an inner sleeve within the tubular element. The tubular element has an outer surface and an inner surface. The outer casing and outer surface of the tubular element define a first annular passage through which a first fluid flow path extends. The inner sleeve and inner surface of the tubular element define a second annular passage through which a second fluid flow path extends. The first annular passage is sealed against the outer surface of the tubular element and the second annular passage is sealed within the inner surface of the tubular element.

Energy storage and retrieval systems are disclosed, along with methods of storing and retrieving the energy. The systems include an energy storage system and a trilateral cycle. The energy storage system includes low- and high-temperature energy storage tanks storing one or more energy storage media that exchange heat with a working fluid in both a gradient heat exchanger and a substantially isothermal heat exchanger in the trilateral cycle. Pressure changing devices transport the energy storage medium/media between the storage tanks and through the heat exchangers. The working fluid rejects heat to the energy storage medium and drives a turbine when the system is charging, and the energy storage medium rejects heat to the working fluid when the system is discharging. In some embodiments, the energy storage medium drives a second turbine when the system is discharging.