688results about How to "Reduce heat transfer area" patented technology

The invention discloses a power generation system using exhausting and cooling waste heat in an internal combustion engine at the same time and a control method therefor. The control method comprises the steps as follows: transferring waste heat in the cooling liquid of the internal combustion engine to an organic working medium by using a preheater in an organic Rankine cycle loop; transferring waste heat taken away by the exhaust gas of the internal combustion engine to the working medium of the organic Rankine cycle loop by using a heat-conducting oil loop; evaporating and gasifying the working medium; transforming enthalpy change in a high-enthalpy expansion process into useful work for outputting by using a single-screw expansion machine; driving a power generator to generate power; taking the tail gas temperature of an exhaust pipe outlet as feedback quantity for realizing the flow closed-loop control of the heat-conducting oil; taking the inlet working medium temperature of the single-screw expansion machine as feedback quantity for realizing the flow closed-loop control of the organic working medium; and taking the outlet working medium temperature of a condenser as feedback quantity for realizing the closed-loop control of the fan motor of the condenser. According to the invention, the flow quantities of the working mediums of the organic Rankine cycle loop and the heat-conducting oil loop are adjusted by using the segmented PI (Proportion Integration) control, so that the waste heat in the internal combustion engine is made the best of, the heat efficiency of the internal combustion engine is improved, and the hazard of the exhaust gas on the environment is reduced.

A heat storing device for exchanging heat energy between a heat storing material and a fluid. The heat storing device has a heat storing module having heat storing material spaces filled with a heat storing material and fluid passages for a fluid to flow through adjacent to the heat storing material spaces. The heat storing module includes multiple plates in a stack. Each of the multiple plates has fluid passages in one side thereof. In mutually adjacent pairs of plates, the sides having the fluid passages face each other. When each pair of plates is seen face-on, with respect to the fluid passages of one of the plates, the fluid passages of the other plate intersect substantially at right angles, and the fluid passages of the two plates connect at these positions where they intersect.

The invention relates to a composite sleeve double-helix heat exchanger. At present, a plate type heat exchanger has high coefficient of heat transfer but can bear lower working pressure; a pipe shelltype heat exchanger is of a pressure-resisting structure but has very low coefficient of heat transfer; and a pipe type heat exchanger is formed by a single heat exchanging pipe or a heat exchange pipe bundle and has low heat transfer rate due to thick viscous flow layer of liquid inside the pipe and poor circulation state due to very low flow rate of liquid outside the pipe. In a double-helix three-sleeve heat exchanging pipe bundle of the composite sleeve double-helix heat exchanger, a middle pipe and a hollow inner pipe form an inner flow passage; inner helical blades are arranged in an annular gap of the middle pipe and the inner pipe; an outer pipe and the middle pipe form an outer flow passage; outer helical blades with opposite handedness with the inner helical blades are arranged in an annular gap of the middle pipe and the outer pipe; and two-phase liquid fast forms an annular lamella in the pipe to flow forwards in a helical scouring way. The structure not only has strong structure, but also can greatly improve the heat-transfer characteristic of the heat exchanger.

Claus sulfur recovery plants that include one or more single-stage or multi-stage compact tubular Claus catalytic reactor-heat exchanger units are disclosed. In some instances, these new or improved Claus plants additionally include one or more compact heat exchanger containing cooling tubes that are filled with a heat transfer enhancement medium. The new compact tubular Claus catalytic reactor-heat exchanger units and HTEM-containing heat exchangers are also disclosed. A process for recovering sulfur from a hydrogen sulfide-containing gas stream, employing the new tubular Claus catalytic reactor-heat exchanger unit, and in some instances a HTEM-containing heat exchanger, are also disclosed.

The invention discloses an indirect air cooling method and a system with the working fluid of parallel-connected obverse and inverse refrigeration cycles. Based on the phase transition in the working fluid cooling process, a double-phase transition heat exchanger and a single-phase transition heat exchanger are respectively coupled with an obverse refrigeration cycle and an inverse refrigeration cycle which are connected in parallel; the saturated gaseous refrigerant from the phase-transition heat exchangers is compressed, boosted and then sent to an air-cooled radiator for exothermic condensation, then the condensed refrigerant enters a liquid storage tank and is decompressed through a throttle valve and sent to the phase-transition heat exchangers so as to complete the obverse refrigeration cycle; or the saturated gaseous refrigerant from the phase-transition heat exchangers is throttled and decompressed through a thermal expansion valve and then sent to the air-cooled radiator and the liquid storage tank, pressurized by a booster pump and finally sent back to the phase-transition heat exchangers so as to complete the inverse refrigeration cycle. The method and the system can be widely applied to the cooling systems of the condensers in thermal power, nuclear power and other turbine-generator units or the cooling systems of the intercoolers in petroleum, chemical and other industries to reduce energy consumption, save investments, as well as improve water-saving rate and the adaptability of the cooling system to the environment; therefore, the method and the system are provided with promotional values and can produce larger social environmental benefits and economic benefits after implementation.

The high vacuum heat insulating low temperature liquefied gas storing tank includes frame and tank body. The tank body consists of outer casing, inner container and combined support structures connecting the outer casing and the inner container. The combined support structures are set between the inner sealing head and outer sealing head on two ends of the tank to bear the radial load and the axial load with great bearing force. The heat conducting area between the inner container and the outer casing is small, and the inner container has great effective loading volume.

The invention discloses a solution-spraying type air-conditioner heat pump unit, belonging to the field of refrigerating air-conditioning equipment. The solution-spraying type air-conditioner heat pump unit is technically characterized in that with the adoption of the solution spraying, the unit diffuses condensation heat to the environment in summer and takes heat from the outdoor air environment in winter; and the solution is regenerated by the using of exhausted gas of the compressor or hot water manufactured by the unit. Compared with an air source heat pump unit, the solution-spraying type air-conditioner heat pump unit has the obvious characteristics that the refrigeration efficiency is high, the continuous heating operation can be realized without defrosting in winter and the heating efficiency is high, and in addition, the structure of the unit is compact and the early-investment of the equipment is low.

The invention provides an adsorption type high pressure natural gas dehydration process and a device, and the Joule-Thomson effect is utilized for converting the pressure loss during the process of reducing the pressure of high pressure natural gas into cold energy of low-temperature gas flow, thereby carrying out heat exchange on the cold gas flow and hot gas flow, cooling the hot gas flow, increasing the temperature of the cold gas flow, effectively reducing the energy loss, simplifying equipment and saving energy. The method comprises three steps of adsorption, regeneration and switching, and the device increases a pressure reducing valve and a heat exchanger for treatment of finished product gas, thereby not using a cooling fan during the cooling process, saving electrical energy, avoiding troubles caused by explosion prevention of a motor and being safe and energy-saving.

The invention discloses an air conditioner and a defrosting method thereof. The air conditioner comprises a heat exchange system and a control system, wherein the heat exchange system comprises a compressor, a four-way valve, a first indoor heat exchanger, a second indoor heat exchanger, a throttling device, a first outdoor heat exchanger and a second outdoor heat exchanger, wherein an indoor unit adapter of the four-way valve is connected with the inlet pipe of the first indoor heat exchanger and/or the inlet pipe of the second indoor heat exchanger, and an outdoor unit adapter of the four-way valve is connected with the outlet pipe of the first outdoor heat exchanger and/or the outlet pipe of the second outdoor heat exchanger; and the outlet pipe of the first indoor heat exchanger and the outlet pipe of the second indoor heat exchanger are connected with the inlet pipe of the first outdoor heat exchanger and/or the inlet pipe of the second outdoor heat exchanger through the throttling device, the outlet pipe of the first outdoor heat exchanger is connected with the inlet pipe of the second outdoor heat exchanger, and the outlet pipe of the second outdoor heat exchanger is connected with the inlet pipe of the first outdoor heat exchanger. By adoption of the air conditioner and the defrosting method thereof, the indoor comfort degree is guaranteed, and meanwhile, the defrosting efficiency of the air conditioner is improved.

The invention relates to a hydrochloric acid pickling waste liquid resource integrated utilization method for preparing iron oxide and ammonium sulfate. Iron-containing hydrochloric acid pickling waste liquid obtained from a pickling treatment process, which uses hydrochloric acid solution as a pickle to remove surface oxides on a steel element, is used as a raw material. The method comprises the following steps of: (1) solid-liquid separation; (2) preheating and heating; (3) miscible displacement; (4) flash evaporation; (5) evaporation and crystallization; (6) solid-liquid separation; (7) mixing and dissolving; (8) pH adjusting; (9) adsorption for impurity removal; (10) solid-liquid separation; (11) neutralization and oxidation; and (12) solid-liquid separation. A liquid phase material is further used for preparation of an ammonium sulfate product, and a solid phase material is further used for preparation of an iron oxide product; besides, ammonium sulfate by-products can be prepared in further preparation of the ammonium sulfate product. The invention has advantages of reasonable technology, simple method, environment-friendliness, energy saving, low preparation cost, good product quality and high utilization rate of valuable components.

The invention discloses a control method for an air conditioner and the air conditioner. The control method for the air conditioner includes steps that detecting an outdoor environment temperature; when the outdoor environment temperature is smaller than a first preset temperature, controlling the air conditioner to enter a low-temperature refrigerating mode, and controlling the open and close of a stop valve according to the outdoor environment temperature when the air conditioner is located at the low-temperature refrigerating mode. According to the control method for the air conditioner, a compressor is avoided from a liquid impact phenomenon through reducing the heat exchange area of a condenser, and accordingly the normal refrigeration cycle of a refrigerating system is guaranteed, and the low-temperature refrigerating function of the air conditioner is realized.

To provided a high heat transfer performance with a heat transfer pipe used to a condenser and an evaporator in a refrigerating cycle using a refrigerant mixture, the heat transfer pipe includes main grooves and auxiliary grooves each formed on the inner surface of the heat transfer pipe with the main grooves intersecting the auxiliary grooves, wherein a length of ribs, which are divided into sections by the auxiliary grooves, of ridges formed along the direction of the main grooves is made longer than the length of the ridges, a width of the auxiliary grooves is made smaller than the length of the ribs and further the auxiliary grooves are formed in a direction where a pressure gradient in the heat transfer pipe is reduced.

The invention discloses a fluidization enhanced heat transfer method and a fluidization multiphase heat transfer medium. The heat transfer process is enhanced by adding particles inside a supercritical flow body. The technique can be widely applied to an air conditioner, a heat pump, a heat pipe, the heating, the cooling of an internal-combustion engine, an electronic device and the cooling of a power device, raises the energy utilization rate of the whole system, improves the heat control of the system and increases the thermal management ability.

The invention discloses aprocess of two-stage condensing phosphoric acid with wet method. It comprises condensing phosphoric acid, clarifying, adsorbing with fluorine and water circulation system; and it employs a two-stage condensing course in series: adding diluted phosphoric acid into the first stage condensing closed circuit, heating with steam, steaming out of water in a short time invacuum condition to condense phosphoric acid into mediate acid, clarifying to remove part of suspending soild and getting clean acid A; putting acid A to the second condensing system to be condensed into diluted phosphoric acid, clarifying and getting clean acid B, that is the finished product. The left acid by clarifying in the two stages is used for preparing compound fertilizer or is recoveried after press filtration; the SiF4 and HF in steam is adsorbed through two-stage adverse current and is prepared into side product of fluosilicic acid. The invention smploys a two-stage condensing process, which improvese heat and mass transferring process, saves investment at the same production capability; reduces phosphoric acid circulation amount and circulating water consumption; reduces phosphoric acid viscosity and improves concentration and quality of finished product.

The invention discloses a solution cooling absorption type ammonia water motive power circulation device, which consists of an evaporator 1, a turbine machine set 3, a regenerator 4, a low-pressure absorbing device 5, a low-pressure ammonia pump 6, a gas-liquid separator 7, a pre-heater 8, a high-pressure absorbing device 9, a high-pressure ammonia pump 10, a throttle valve 11 and a connecting pipeline, wherein the low-pressure absorbing device and the high-pressure absorbing device are respectively divided into a solution cooling absorbing section and a cooling water absorbing section, and the solution cooling absorbing section is arranged above the cooling water absorbing section. The solution cooling absorption type ammonia water motive power circulation device has the advantages that the absorbing device outlet solution is used for cooling the front section of the absorbing process, the cooling water quantity can be reduced, the heat discharge and the heat transfer loss on the environment can be reduced, the heat transfer area is favorably reduced, and the circulation heat efficiency is favorably improved. The solution cooling absorption type ammonia water motive power circulation device is provided with the three-flow pre-heater for preheating work solution before entering the evaporator, the dilute solution and rich ammonia gas entering the absorber can be cooled, the absorption driving force can be enhanced, and in addition, the smoke gas low-temperature corrosion resistance of the device is favorably improved.

A fortified heat conducting wing of the shutter, it includes the flat base piece and wings. There are some groups of standing wings on the flat base piece, which connects to the base of the wing forming some window angle. The area between every wing is the direction changing area, both sides of which have counter opening direction. The opening angle of every wing is same, the whole opening angle of every wings decreases as the length for the air flowing increases. This invention can increase the heat exchanging, but has no effect on the resistance of the whole wings. Adopting this heat exchanger, it can reduce the area of the whole wings, reduce the cost and save the material.

The invention discloses a control method of a combined type air-conditioning system with a natural cooling function. The control method of the combined type air-conditioning system with the natural cooling function is characterized in that the system comprises a compressor module, an air-cooling heat exchange module, a multifunctional liquid storage device, a liquid pump, an air treatment module and control valves, wherein the air-cooling heat exchange module is composed of a heat exchanger assembly and a cooling fan; and the control method comprises the step that the three different work modes including a compression refrigeration work mode, a compression refrigeration and natural cooling coordinated operation combined refrigeration work mode and the natural cooling work mode are achieved by operating the control valves to change the flowing path of refrigeration media. According to the control method of the combined type air-conditioning system with the natural cooling function, fuzzy control is used for adjusting the refrigeration capacity, natural cooling is used for replacing compression refrigeration in low-temperature or transition seasons, natural cold resources are efficiently utilized, the control method is particularly suitable for control over the work environments of data centers, high-performance computers, communication base stations and power electronic equipment, and the energy consumption and operating cost of the air-conditioning system are greatly reduced.

The invention provides a water logging and air cooling combined passive containment cooling system and method. The system is completely self-started, free of intermediate control procedure and high in reliability. The is characterized by comprising a cooling pool and an air flow guide cover, wherein the cooling pool can submerge a containment, the air flow guide cover is arranged at the outside of the containment in the cooling pool, the air flow guide cover is provided with a surrounding part surrounding the containment, and a flow guide part located above the top part of the containment and extending to the atmosphere, the surrounding part and the flow guide part are connected into an entirety, the cooling pool is provided with an air inlet, and the air inlet of the cooling pool, the surrounding part of the air flow guide cover and the flow guide part form an air flow passage with a chimney effect.

A cylindrical steam reformer and process for manufacturing the same, wherein a honeycomb reforming catalyst is disposed in a clearance between an inner cylinder and an outer cylinder, making up a double cylinder. The cylindrical steam reformer improves thermal conductivity from the inner cylinder and the outer cylinder to the reforming catalyst.