183results about How to "Reduce wall temperature" patented technology

A coating system and method for reducing the tendency for hydrocarbon fluids, such as fuels and oils, to form carbonaceous deposits that adhere to a wall of a containment article. Of particular concern are carbonaceous deposits that form at temperatures below about 650° F. (about 345° C.). The coating system combines an outermost layer of platinum with a ceramic barrier layer. The coating system significantly reduces the formation of carbonaceous deposits and the adhesion of such deposits. To further reduce wall and hydrocarbon fluid temperatures and formation of carbonaceous deposits, the coating system is preferably applied to the surface of the wall wetted by the fluid, as well as the opposite surface of the wall exposed to a surrounding environment. The outermost layers serve as radiation shields to reduce heat transfer from the surrounding environment to the wall, and from the wall to the hydrocarbon fluid.

An internal combustion engine includes a pre-chamber. In another aspect, pressure within a pre-chamber is equal to or greater than pressure within a main combustion chamber at least prior to ignition in the main combustion chamber. In yet another aspect, internal combustion engine control software automatically controls pressure within a turbulent jet ignition pre-chamber, controls a valve-actuator to admit a fuel-air charge into the pre-chamber, and causes an igniter to initiate combustion in the pressurized pre-chamber. This also permits the rate of combustion to be controlled in the primary chamber regardless of the air-fuel ratio or the diluent fraction in the main chamber. Another aspect employs a pre-chamber purge pump with separate air and fuel injection.

The invention discloses a connection structure of an engine exhaust gas reclrculation pipe and a plastic inlet manifold, comprising an exhaust gas recirculation inlet pipe and a plastic inlet manifold, a thermal sleeve pipe is arranged on the connection part of the exhaust gas recirculation inlet pipe and the plastic inlet manifold, the thermal sleeve pipe is arranged in an entrance of a connection lug boss of the plastic inlet manifold, a connecting head of the exhaust gas recirculation inlet pipe is inserted into the thermal sleeve pipe, and the exhaust gas recirculation inlet pipe and the plastic inlet manifold are connected and mutually separated by the thermal sleeve pipe. The connection structure can avoid the direct contact of the exhaust gas recirculation inlet pipe and the plastic inlet manifold, directly conducts high temperature to the plastic inlet manifold, reduces the wall surface temperature of the inlet manifold of the connection of the EGR (Exhaust Gas Recirculation) pipe and the plastic inlet manifold, better protects the inlet manifold, and improves the reliability of the plastic inlet manifold with the EGR system.

One exemplary embodiment of the present invention can be a hydrocarbon conversion process. The process may include passing a hydrocarbon stream through at least one heater including at least one burner, a radiant section, and a convection section. Generally, the stream passes through the radiant section and then through the convection section before exiting the heater. Desirably, the hydrocarbon stream includes, in percent or parts by weight based on the total weight of hydrocarbons in the stream:C4 or less: less than about 0.5%,sulfur or sulfur containing compounds: less than about 1 ppm, andnitrogen or nitrogen containing compounds: less than about 1 ppm.Preferably, the sulfur or sulfur containing compounds and the nitrogen or nitrogen containing compounds are measured as, respectively, elemental sulfur or nitrogen.

The invention discloses a waste gas inlet end structure of an EGR (Exhaust Gas Recirculation) cooler. The waste gas inlet end structure comprises a water shell, a gas inlet pipe, a corrugated pipe, an gas inlet chamber of a heat insulation pipe, a pre-cooling water chamber and a main plate, wherein the water shell is provided with the water inlet pipe. The waste gas inlet end structure is characterized in that the heat insulation pipe is arranged in the corrugated pipe; one end of the corrugated pipe is connected with the gas inlet pipe and the other end of the corrugated pipe is suspended; the large-diameter end of the gas inlet chamber is connected with the main plate to form the gas inlet chamber, and a cooling liquid channel is formed between the water shell and a jointing part between the gas inlet chamber and the main plate; the outer surface of a middle pipe body is connected with the end part of the corrugated pipe to form the pre-cooling water chamber; and the small-diameter end of the gas inlet chamber is contacted with the outer surface of the middle part of the heat insulation pipe. The waste gas inlet end structure of the EGR cooler has the advantages that by virtue of the added pre-cooling water chamber, temperatures of the wall faces of the main plate and the gas inlet chamber are reduced; a support is additionally arranged in the middle of the heat insulation pipe, so that the anti-vibration performance of the heat insulation pipe is improved; and by virtue of a special structure of the gas inlet chamber, an inner axial heat expansion displacement compensation capability of the EGR cooler is improved. By virtue of the improvement, the reliability of the EGR cooler is obviously improved.

The invention discloses a method for cooling high temperature parts through catalytic reforming of a liquid hydrocarbon fuel, and in particular relates to a process method for cooling high temperature parts. The liquid hydrocarbon fuel and water are blended and preheated to be vaporized into mixed vapor of hydrocarbon fuel vapor and water vapor, the mixed vapor enters a catalytic reforming reaction cooling section on the surface of a high temperature part, a reforming endothermic reaction is generated on the surface of a catalyst, and the surface temperature of the high temperature part is reduced; meanwhile, combustible gas rich in hydrogen is generated and is sprayed through a fuel nozzle or a convergent nozzle to form a combustible gaseous mixed fuel required by combustion. By the method, the cooling amount is great, the surface temperature of the high temperature part is effectively reduced, the coking of a cooling channel is relieved, and an effect of cooling the high temperaturepart and the characteristics of the fuel are improved.

The invention provides an all-weather photo-thermal photovoltaic integrated automatic control heat pipe water heater. The water heater comprises a solar water tank, a support, heat pipes, a thermoelectric generation module, a storage battery, a cold water circulation system and a controller which are mutually connected. The all-weather photo-thermal photovoltaic integrated automatic control heat pipe water heater has the effect that the problem of energy waste caused by hot water boiling and evaporation in an existing hot water tank is effectively solved through the water heater. Heat exchange between a water storing tank and the cold end for cooling the thermoelectric generation module is conducted through a cold water inlet pipe and a cold water outlet pipe, so that the temperature in the water storing tank can be increased by 10-20 DEG C, correspondingly, water supplied to the solar water tank from the water storing tank is preheated once, and heat is fully utilized. The all-weather photo-thermal photovoltaic integrated automatic control heat pipe water heater can not only provide hot water for a user, but also fully utilize the temperature difference between cold water and the hot water to generate electricity, thereby saving energy and being environmentally friendly, safe and efficient.

The invention provides a combined air preheater suitable for SCR (Selective Catalytic Reduction) post-denitration, which comprises a flue and an air duct which are arranged downstream a denitration device, and also comprises a secondary air section, a primary air section, an ammonium bisulfate condensation resistant section and an ammonium bisulfate curing section which are sequentially arranged along the flue gas flowing direction, wherein the primary air section, the ammonium bisulfate condensation resistant section and the ammonium bisulfate curing section are phase change heat exchangers, and the phase change heat exchanger comprises a heat absorbing section positioned in the flue, a heat releasing section positioned in the air duct, and a riser and a downcomer which are used for connecting the heat absorbing section and the heat releasing section; the heat releasing section is higher than the heat absorbing section, and a circulating medium is arranged in the phase change heat exchanger; the wall surface temperature of the ammonium bisulfate condensation resistant section is higher than the dew-point temperature of ammonium bisulfate, and the wall surface temperature of the ammonium bisulfate curing section is lower than the freezing point temperature of ammonium bisulfate. The combined air preheater puts an end to the phenomenon that liquid ammonium bisulfate blocks the heating surface of the air preheater due to dust, and also effectively prevents the liquid ammonium bisulfate from corroding the air preheater.