Abstract: A sealing member for use in a gas preheater is adapted to seal a gap between an outer peripheral portion of a rotor and a housing in the gas preheater or a gap between a side face of the rotor and a radial sealing member. At least a part of said sealing member is made of an inorganic glass and/or a wear resistive ceramic having a coefficient of thermal expansion of not more than 70.times.10.sup.-7 /.degree.C. A sealing member for use in a gas preheater may comprise a heat resistive ceramic, and a corrosion resistive steel, wherein the ceramic is substantially surrounded with the corrosion resistive steel, excluding a sliding surface of the ceramic.

Abstract: This process is intended to remove at least a part of the heat produced in at least one reaction and/or purification operation involving anhydrous HF, the cooling being performed by heat exchange with a cooling fluid circulating in a circuit which comprises at least one exchange zone (9; 10; 11) presenting a risk of leakage of HF into the cooling fluid. The fluid of this kind which is employed is an aqueous solution of at least one compound chosen from (a) strong bases, (b) the salts resulting from the combination of a strong base and of an organic or inorganic acid whose pKa is >3.5, (c) the salts of amphoteric oxides with bases, (d) compounds which, in contact with water, are converted into one of the abovementioned compounds; the said cooling fluid is circulated in a closed circuit, and the operation is carried out with a cooling fluid pressure which is lower than the pressure at which the reaction and/or the purification operation is conducted.

Abstract: A geothermal heat converter for converting geothermal heat to steam. The converter is mounted in the lower end of a geothermal well conduit and includes a cup portion in direct engagement with the geothermal brine or medium. The cup portion is sealed with respect to the conduit, and the upper region of the converter includes a tubular housing constituting a heat exchanger having longitudinally extending tubes extending therethrough in communication with the cup. The cup is formed of a tungsten carbon composition, and is coated with platinum to reduce corrosion.

Abstract: A thermal storage apparatus comprises a series of stacked heat exchange modules. Each module extends horizontally and comprises channels separated by corrugations. Each channel has underneath it a heat exchange fluid pipe through which a primary or secondary coolant circulates. An inlet pipe delivers the phase change medium, for example water, to the lower most module from which it circulates to the top of the apparatus. The modules are stacked by the wall of a module engaging a groove of the next module above it.

Abstract: A method of obtaining enhanced thermal energy between a material forming apparatus and a cooling fluid is disclosed. A two component heat transfer fluid of the type including a carrier fluid and a plurality of discrete particles that undergo a reversible latent energy transition upon the transfer of thermal energy thereto. The temperature of the particles is adjusted (heated or cooled as necessary) to the point of the beginning of latent energy transition of the particles. The fluid is then brought into contact with a heat source such as a metal forming apparatus and a workpiece, proximate the interface therebetween. The slurry may then be collected, adjusted to the point of the beginning of latent energy transition and re-circulated to the heat source.

Abstract: A vertical tube heat exchanger for use with fluidized solid particulates as a heat transfer medium includes a plurality of vertically extending spaced apart tubes for containing an internal fluid flowing in heat transfer relationship with the walls of the tube. A containment housing is provided around the tubes for containing a flow of fluidized solid particulates moving through a heat exchange chamber in the housing around the exterior surface of the tubes. A gas plenum chamber is provided adjacent a lower end of the containment housing for directing fluidizing gas into the solid particulates. The housing includes a dividing floor between an upper heat exchange chamber and a lower plenum chamber and the floor is formed with openings in concentric alignment with the vertical tubes for injecting fluidizing gas into the heat exchange chamber around the tubes to flow upwardly into a bed of solid particulates.

Abstract: A nucleating agent for solutions comprises a metal bar, magnetic tape adhered to a surface area of the bar and particulate magnetite on the surface of the tape. The magnetic field created by the tape holds the bar, tape and magnetite in fixed relation to each other.

Abstract: There is disclosed a new and improved single-row, two-pass steam condensing bundle used for condensing steam in air-cooled vacuum steam condensers in power plant applications and the like. The new bundle is divided into a plurality of identically built mini-bundle sets. Each mini-bundle set has one centrally located 2nd-pass tube with symmetrically placed 1st-pass tubes positioned on either side of it. The steam leaving each 1st-pass tube is controlled by a flow equalizing device installed at the end of the tubes. The flow of the noncondensible gas mixture leaving each 2nd-pass tube is controlled by an individual orifice in the gas piping system. The larger the number of mini-bundle sets incorporated into the bundle, the greater its counterflow freeze protection feature.

Abstract: A cooling system for a liquid cooled engine comprises a first fluid line interconnecting the coolant exhaust port of an internal combustion engine and an exchange tank having a high pressure region and a low pressure region, a second fluid line interconnecting the high pressure region of the exchange tank and a heat exchanger, a third line interconnecting the heat exchanger and the inlet of a coolant pump attached to the coolant input port of the engine, and a fourth coolant line interconnecting the low pressure region of the exchange tank and the third line. The fluid contained within both the low and high pressure regions is of engine discharge temperature. By this arrangement the pressure maintained at the coolant inlet of the pump and the low pressure region of the exchange tank is equal. The low pressure region is preferably a tank situated within the high pressure region, thereby resulting with a tank being situated within a tank.

Abstract: This invention discloses an extremely simple chemical heat pump system utilizing the chemical reaction heat of a perfectly reversible chemical disassociation reaction system wherein one gaseous compound is involved in the reversible reaction. The present system can realize a large coefficient of performance over a very attractive temperature range and level for general use, by absence of any phase transition. Reaction kinetics of the system are excellent since only one reversible non-flammable gaseous compound is involved in the chemical heat pump system. The system can be provided with a computer controlled system for changing the restriction value of the expansion valve. The system utilizes jet ejectors in combination with the compressor in the same or different loops to reduce the capacity requirements on the compressor.

Abstract: The present invention is an arrangement of seals for an air heater used to preheat the intake air of a combustion process. Flexible seals and torsion bars are utilized in order to allow the flexible seals to adjust angle and properly fill the void space to be sealed. Also, a combination of sealing elements are used on the circular seal of the present invention in order to create a tortuous path for gas flow through the seals. The present invention offers many advantages over seals found in the prior art including improved wearability and low maintenance.

Abstract: A cooling fluid is circulated around a closed circuit including a heat source, for example by a pump. The system includes a heat exchanger for removing heat from the fluid. Valve means are provided which are operated by changes in volume of the cooling fluid to cause the fluid to bypass the heat exchanger when the temperature of the fluid is below a predetermined value.

Abstract: Difficulty in heat exchanger module replacement and the cost of plural manifolds in a modular heat exchanger useful in heavy duty vehicles or the like is avoided in a construction that includes an elongated manifold (20) having spaced interior inlet and outlet channels (84, 86) along with a plurality of spaced inlet and outlet ports (68, 70) in fluid communication with respective ones of the inlet and outlet channels (84, 86). An elongated frame member (14) is spaced from and parallel to the manifold (22) and has a plurality of spaced retaining formations (42). A plurality of heat exchanger modules (12) are mounted between the frame member (14) and the manifold (20) in side by side relation and each module has spaced tanks (34, 36; 50, 52) with a plurality of finned tubes (30, 32) extending between and in fluid communication therewith.

Abstract: A plate-type heat exchanger comprises a stack of flat tubes each composed of a pair of confronting core plates jointed to each other and defining a fluid passage. A cross sectional area of the fluid passage is increased along the flowing direction of the refrigerant. A plurality of ribs are disposed on the fluid passage. A flowing resistance of the ribs which are disposed near an outlet tank is lower than that of the ribs which are disposed near an inlet tank.

Abstract: A venting arrangement for a cooling circuit of an internal combustion engine, having a vent line which connects a radiator to a top section of an expansion tank located at a higher level with regard to the top of the radiator. In order to avoid trapping of air inside the vent line, a vent valve in the form of a flap or diaphragm valve is installed at the highest point of the vent line, via which vent valve the trapped air can escape during travelling operation and during filling. By the arrangement of the vent valve inside the expansion tank, the cooling water expanding during running of the engine and discharging via the vent valve remains in the expansion tank.

Abstract: An apparatus is provided for maintaining a particular temperature differential and/or adjustable temperature gradient between two, possibly variant domains on a first glass, ceramic or synthetic plate, includes a first active thermal element (heater or cooling element) in contact with that plate for adjusting the temperature of a first domain; a ferrofluid, liquid metal, solder etc. droplet and made of a material that has a thermal conductivity higher than the thermal conductivity of the plate, rests on a second plate and in thermal contact therewith; a second active temperature means (heater or cooling element) on the second plate determines the temperature of the droplet; and the droplet is flattened to different degrees to thereby vary the area of contact between the top part of the droplet and the first plate.

Abstract: The present invention is directed to a regenerative thermal oxidizer apparatus and a method for purifying gases by thermal oxidation and by exchange of heat by inleting and outleting gases. The oxidizer has at least three regenerative thermal chamber units and these units have on a single surface both an inlet opening and an outlet opening which are typically connected to inlet and outlet gases. Set against the inlet and outlet openings is a slidable gate which has a single opening which moves through cycles so that its single opening coincides with the inlet opening of its chamber unit, or a space which is closed between the inlet and outlet opening, or coincide with the outlet opening. In other words, the gate cycles between inleting gases, no gas movement, and outleting gases. There are means providing for moving the gate through the aforesaid cycle and, as mentioned, inlet ducts and outlet ducts connected to their respective openings.

Abstract: The manufacturing of high temperature superconducting crystals and high quality crystals in general requires a furnace design with very precise process control to minimize the crystal defects. A furnace design of this type can be realized by growing crystals in the cavity of the evaporator section of a specially designed heat pipe, since the temperature of the working fluid in the heat pipe, and thus in the cavity and crystal, can be maintained very accurately by the control of the evaporating pressure of the heat pipe's working fluid. The crystals are grown from the melt from the bottom of a cooled and rotating crucible which is placed into the heat pipe evaporator cavity. The growth of high temperature superconducting crystals requires high furnace temperatures and an oxygen atmosphere. The high temperature furnace condition is achieved with sodium and potasium heat pipes.

Abstract: A plant having a combustion chamber can employ at least one heat pipe. The heat pipe is mounted to exchange heat between flue gas in a flue gas path and combustion air in a combustion air path. A protection system has a dual passage for separately conducting the flue gas and the combustion gas. The dual passage has a wall separating the flue gas path from the combustion air path. The heat pipe is mounted through the wall. A sensor is mounted about the heat pipe for providing a temperature signal signifying the temperature at the heat pipe. A damper is coupled to the sensor and communicates with the dual passage for mixing relatively cooler air with the flue gas in the dual passage, upstream of the heat pipe, in response to the temperature signal violating a predetermined limit.

Abstract: A heater which is preferably rated at about 1,500 watts is described. This heater contains at least three separate heat exchangers; each of the heat exchangers contains heat exchanger tubes, and each of the heat exchangers contains a different fluid capacity.A blower passes cold air, in sequence, past the first heat exchanger, then past the second heat exchanger, and then past the third heat exchanger. At the same time, a pump forces a heated heat-exchange medium through the third heat exchanger, through the second heat exchanger, and then through the first heat exchanger.