473 results about "Regenerative heat exchanger" patented technology

Disclosed is a regenerative heat exchanger including a brush-seal configuration to prevent mixing of fluid flows. The regenerative heat exchanger includes a regenerator, and at least two conduits, each conduit having a matrix end abutting a face of the regenerator matrix. The at least two conduits carrying at least two fluid flows, the fluid flows which pass through the regenerator matrix. The regenerative heat exchanger includes a plurality of brush-seals, each brush-seal located at a matrix end of each conduit without contacting the matrix, thereby sealing around a periphery of each conduit to prevent mixing of fluid flows. Also disclosed is a method for establishing a minimal gap between a regenerator matrix of a regenerative heat exchanger and a plurality of brush-seals.

When a heating mode is set in a refrigerant cycle system, air is heated in a condenser by condensing high-pressure gas refrigerant, a part of high-pressure refrigerant from the condenser is decompressed in a pressure reducing unit to a middle pressure, and the other part of high-pressure refrigerant from the condenser is heat-exchanged with the middle-pressure refrigerant having passed through the pressure reducing unit in a refrigerant-refrigerant heat exchanger. Therefore, middle-pressure refrigerant having passed through the pressure reducing unit is evaporated in the refrigerant-refrigerant heat exchanger and the evaporated middle-pressure refrigerant is introduced into a gas injection port of a compressor. Thus, in the refrigerant cycle system, heating capacity can be improved due to the gas refrigerant injection into the compressor.

A reheat heat exchanger is provided particularly for use in Rankine cycle power generation systems. The reheat heat exchanger includes a high pressure path between a high pressure inlet and a high pressure outlet. The reheat heat exchanger also includes a low pressure path between a low pressure inlet and a low pressure outlet. The two paths are in heat transfer relationship. In a typical power generation system utilizing the reheat heat exchanger, the high pressure inlet is located downstream from a source of high temperature high pressure working fluid. An expander is located downstream from the high pressure outlet and upstream from the low pressure inlet. A second expander is typically provided downstream from the low pressure outlet. The reheat heat exchanger beneficially enhances the efficiency of power generation systems, particularly those which utilize expanders having inlet temperatures limited to below that produced by the source of working fluid.

Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while in a stationary position. Both rotary and modular heat exchangers are described. Also described are methods for transferring heat between a hot and cold fluid using the discontinuous movement of matrices.

An reversible engine (10) is disclosed having a conduit system (11), a first electrochemical cells (12), and a second electrochemical cell (13). The conduit system (11) includes a first conduit (15) extending from the first electrochemical cell (12) to the second electrochemical cell (13), and a second conduit (16) extending from the second electrochemical cell (13) to the first electrochemical cell (12). The heat engine (10) also includes a heater (18) mounted in thermal communication with the conduit system (11) adjacent the second electrochemical cell (13), a cooler (19) mounted in thermal communication with the conduit system (11) adjacent the first electrochemical cell (12), and a regenerative heat exchanger (20) thermally coupled to the first and second conduits (15) and (16) for the transfer of heat therebetween.

A small and cost effective sewage treatment system intended for unattended use in individual homes, small industries or businesses in locations where a central sewage treatment plant is not available. The sewage treatment system comprises a conventional septic tank which drains into a smaller aerated holding tank, a pump to transfer effluent from the holding tank into a disinfecting chamber, a regenerative heat exchanger used to raise the temperature of the effluent while being aerated in the holding tank, means for pumping the effluent at a controlled rate through a microwave field, and a conventional drain field used to release the disinfected water into the surrounding soil. Operation of this system is fully regulated by a micro-controller, thereby eliminating the need for human intervention during normal use. This invention also incorporates electronic means for detecting various fault conditions which may impede effective disinfection, means for diagnosing what part of the system is at fault, means for reporting the fault and diagnose to a central municipal location via a telephone or transponder system, an emergency battery backup system, and means for reverting system operation to that of a conventional septic tank and drain field system is case of a total power failure (both A/C and DIC) or water pump failure. Conventional household alternating current or a battery recharged via a wind generator or solar cells may power the sewage treatment system.

A high-frequency, low-temperature regenerator (12). The regenerator (12) includes a substrate (50) having rare earth material (52) disposed thereon. In a specific embodiment, the substrate (50) has channels or pores (54) therethrough or therein to facilitate gas flow through the regenerator (12). The substrate (50) is constructed from a material, such as polyimide, polyester, or stainless steel, which is sufficient to define the geometry of the regenerator (12). The rare earth material (52) is selected and deposited on the substrate (50) in a layer (52) having thermal penetration depth that is greater than the thickness of the layer (52). The thermal penetration depth is sufficiently high to enable all of the rare earth material (52) to contribute to thermal regeneration at an operating frequency of 30 Hz. In the illustrative embodiment, the thickness of the substrate (50) is less than or equal to approximately 0.001 inches. The layer of rare earth material (52) is approximately 0.0002 inches thick. The substrate (44, 50) includes a stack of plated substrates (44) that are stacked so that spaces (54) exist between the plated substrates (44), which result in a porosity of approximately 15 percent. Dimples, pleats, or other mechanisms in the plated substrates (44) preserve the spaces (54) between the plated substrates (44). In the specific embodiment, the spaces (54) are approximately 0.00025 inches wide, and the working gas is helium.

The present invention provides a gas purification system with improved efficiency, simpler construction, cost reductions, form factor improvements, and increased durability. The present invention provides cost and form factor improvements through fewer components overall and through utilizing multiple integrated components. Prior art gas purification systems are more bulky and complicated. The present invention achieves increased thermal efficiency through utilization of a regenerative heat exchanger to recapture a portion of the heat energy transferred to the gas during the purification process. Prior art purifiers lacked a regenerative heat exchanger. The present invention integrates the two components into one integrated heater and purification vessel assembly. The present invention integrates the two discrete components into one integrated hydrogen sorption and particle filter assembly. The integrated hydrogen sorption and particle filter assembly is also capable of operating at higher temperatures. This eases maintenance and manufacture. The resulting gas purification system is simpler through utilizing fewer components, smaller by utilizing fewer and integrated components, and reduced cost through fewer components, smaller components and through reduced manufacture labor requirements.

This invention relates generally to the treatment of NOx in combustion flue gas. In certain embodiments, the invention relates to the use of a regenerative heat exchanger (RHE) to convert urea to ammonia in a side stream of flue gas. Ammonia and/or other urea decomposition products exit the heat exchanger, are mixed with the rest of the flue gas, and enter a selective catalytic reduction (SCR) unit for reduction of NOx in the flue gas. The use of an RHE significantly improves the thermal efficiency of the overall process. More particularly, in certain embodiments, the regenerative heat exchanger is a dual chamber RHE.

A method of operating a Kalina cycle power generation system includes directing a stream of vaporized binary working fluid to a turbine where it is expanded to produce power. At least a portion of the expanded binary working fluid is directed to a regenerative heat exchanger where it is transformed into a feed binary working fluid. The feed binary working fluid is directed to a vapor generator where it is vaporized. The binary working fluid flow within the regenerative heat exchanger is actively regulated to balance the expanded binary working fluid and the feed working fluid.

Integrated web dryer (10) and regenerative heat exchanger (20), as well as a method of drying a web of material using the same. The apparatus and method of the present invention provides for the heating (22) of air and the converting of VOC's to harmless gases in a fully integrated manner via the inclusion of a regenerative combustion device as an integral element of the drying apparatus.

A heat pump refrigerant system has a compressor for delivering a compressed refrigerant to a reversing refrigerant flow control device. The reversing refrigerant flow control device selectively delivers refrigerant to an outdoor heat exchanger in a cooling mode of operation, and to an indoor heat exchanger in a heating mode of operation. Refrigerant from an outdoor heat exchanger passes through an expansion device to an indoor heat exchanger in a cooling mode, and from the indoor heat exchanger through an expansion device and to the outdoor heat exchanger in a heating mode. A reheat circuit includes a reheat heat exchanger positioned to be in the path of air delivered over the indoor heat exchanger and into an environment to be conditioned. The reheat heat exchanger and outdoor heat exchanger both are provided by microchannel heat exchangers. The reheat circuit is utilized to minimize or prevent refrigerant charge migration while operating at a wide spectrum of environmental conditions or switching between modes of operation.

In a furnace such as a glassmelting furnace, a portion of the combustion products formed by combustion of fuel with gaseous oxidant within the furnace are passed through a recuperative or regenerative heat exchanger system to heat a portion of the incoming gaseous oxidant, and a portion of the combustion products are passed instead through a secondary heat exchanger system, wherein the hot combustion products and oxidant which are passed through said first heat exchanger are passed at a heat capacity rate ratio of combustion products to oxidant of less than 1.3.

The invention discloses a continuous combusting regenerative industrial furnace, which includes a rotary regenerative heat exchanger, wherein the rotary regenerative heat exchanger includes a rotary cylinder, an upper cover and a lower cover, and the rotary cylinder is internally provided with a regenerator; the high-temperature smoke outlet on the furnace body is connected with an induced draft fan through the high-temperature smoke inlet and the low-temperature smoke outlet of the rotary regenerative heat exchanger in sequence; an air blower is connected with an combustor on the furnace body through the normal temperature air inlet and the preheated air outlet of the rotary regenerative heat exchanger in sequence; and the rotary cylinder is connected with a rotary driving device. The regenerator in the rotary regenerative heat exchanger rotates to continuously preheat the air, the preheated air can be continuously fed into the furnace, the whole combusting process needs no reversing, the pipeline arrangement is simple, the continuous regenerative heat exchange between the high-temperature smoke and the normal temperature air can be realized, and the whole combusting process needs no reversing and is stable.

A heat treatment equipment having a heating chamber having a plurality of regenerative combustors provided with direct-fired burner having a built-in porous regenerator, for applying a heat treatment to an object in the heating chamber, wherein the substantial average surface pore diameter is not uniform for porous regenerators in a plurality of direct-fired burners or a plurality of regenerative combustors. By making contrivances in the shape of porous regenerators of the direct-fired burners or the regenerative heat exchangers arranged in an area where substances causing choking tend to easily adhere to make it difficult for such substances to adhere or prevent choking phenomenon from becoming apparent.

The invention discloses process technology for comprehensively and efficiently recovering the afterheat generated in the process of producing sulfuric acid from pyritic. According to characteristics of the afterheat on different parts in the production process, different novel process technologies are applied, the recovery rate of the afterheat is improved to the maximum, a three-chamber regenerative heat exchanger is adopted to fully recover the afterheat generated by roasting raw gas, and the utilization rate of the roasting afterheat is improved; and a key process technology that low-temperature cooling water generated through spontaneous heat-insulating vacuum evaporating refrigeration in the process cools the SO2 gas to reduce the vapor content in the SO2 gas entering a drying tower is adopted to fulfill the aim of fully and efficiently recovering the afterheat in the absorption process and the conversion process. At present, the utilization rate of the afterheat recovered in the process of producing acid from the pyritic at home is only 43.4 percent. After the afterheat recovery technology is adopted, the afterheat utilization rate is 83.9 percent, and a way of comprehensively, fully and efficiently recovering and utilizing medium or high pressure overheat vapor generated by the afterheat in the process of producing the acid from the pyritic is opened up.

The invention discloses a three-dimensional heat-pipe heat exchanger. A plurality of pipes are combined into an S-shaped heat pipe by a U-shaped elbow, and the heat-pipe heat exchanger connected by the U-shaped elbow can form a completely continuous coiled pipe. The S-shaped heat pipe and the heat exchanger can be configured into an integrative heat exchanger, wherein a condensing end and an evaporating end are isolated by a heat insulation section, or can be configured into a split type heat exchanger, wherein the evaporating end and the condensing end are connected by an evaporating pipe and a reflowing pipe. The three-dimensional heat-pipe heat exchanger can form a continuous closed loop, in this way, the heat exchanger works no matter whether the reflowing is implemented with the aid of gravity. A plurality of U-shaped pipes are needed to interconnect in the production of the S-shaped pipe to form one S-shaped heat pipe loop, wherein one pipe has an opening end, each of all the pipes can work as one independent heat pipe only by injecting enough refrigerant from the opening end at one time. The three-dimensional heat-pipe heat exchanger can be used for the aspects of enhancement of dehumidification effect of the air conditioner, energy recovering, heat radiation of partial space, and the like.

Cooling/heating system of air conditioner including a duct having a first passage for drawing external air, and a second passage for drawing room air, the second passage having a part crossed with the first passage, a regenerative heat exchanger having first and second flow passages in the crossed part of the first and second passages for indirect heat exchange between the external air and the room air, a case connected to the first and second passages of the duct having first and second outlets for drawing/discharging external and room air, first and second fans for drawing in the external air and the room air into the case through the first and second passages, and discharging the external air and the room air through the first and second outlets, and first and second heat exchangers for heat exchange with the external air and the room air discharge through the first and second outlets, thereby preventing contamination and dried room air and reducing heat loss to permit cooling/heating even with small amount of energy.

The invention provides a multilevel heat accumulation system. The multilevel heat accumulation system comprises a heat accumulation type heat exchanger and which are connected through connection fragements. According to the heat accumulation type heat exchanger, waste heat in cement production is fully utilized, the heat exchange efficiency of the heat accumulation type heat exchanger can be maximized, so that energy is saved, and the purposes of protecting the environment and saving energy are achieved.