120results about How to "Increase heat transfer temperature difference" patented technology

The present invention to an energy-storing phase change material and energy-stored air source heat pump defrosting system, belonging to the field of refrigeration equipment technology. The chemical component of said energy-storing phase change material is formed from CaCl2.6H2O and nucleating agent. Said invention also provides the concrete structure of said system. Said system can implement the function conversion from system heat production, waste heat energy storage, energy-releasing defrosting and heat production.

The invention relates to a method and a device for preparing hydrogen and high-purity carbon monoxide by efficient synthesis gas separation. Continuous rectification is performed by a methane washing tower (C1 tower) with an intermediate heat exchanger and a tower bottom reboiler, a deoxidation-methane tower (C2 tower) with an overhead condenser and a tower pot reboiler and a denitrification tower (C3 tower) with an overhead condenser and a tower pot reboiler to prepare the hydrogen and the high-purity carbon monoxide. According to the method and the device for preparing the hydrogen and the carbon monoxide by efficient synthesis gas separation, the methane washing tower with the reboiler and an intermediate cooler are applied, synthesis gas in which hydrogen content is smaller than 0.5% can be obtained by a single tower pot, hydrogen content of the tower pot is low so that a stripping tower is never required, meanwhile, the hydrogen and the carbon monoxide can be prepared by low energy consumption, 99.9% and over 99.999% of carbon monoxide products can be prepared, and a carbon monoxide compressor is never required when the pressure is larger than 0.2MPa during carbon monoxide preparation so that purposes of saving energy and investments and enhancing operation safety can be achieved.

The invention discloses a sub-control phase-change heat exchange system based on grading combination heat exchange. The sub-control phase-change heat exchange system comprises a flue, an air channel, an air pre-heater, an external water pipeline, a steam supply valve of a low-temperature water heater, the low-temperature water heater, a water inlet valve of the low-temperature water heater, a steam-liquid heat exchanger, a steam supply valve of the steam-liquid heat exchanger, a steam supply valve of an air channel heat exchanger, an external steam supply valve of the air channel heat exchanger, a main water draining pipeline, the air channel heat exchanger, a water tank, a water pump, a water inlet valve of a flue heat exchanger, the flue heat exchanger, and a steam outlet valve of the flue heat exchanger. According to the sub-control phase-change heat exchange system, heat release exchangers which utilize the waste heat of recycled flue gas are arranged in a grading combination mode; according to different situations such as ambient air temperature, operating conditions and the like, the waste heat can be utilized to heat boiler supplied air, condensed water on the side of a steam turbine and the like in a combination mode; meanwhile, the temperature of the condensed water is improved through grading heating, higher energy quality is obtained, and the optimal economic benefit of recycling the waste heat is achieved.

The invention belongs to the field of power battery pack, and in particular, relates to a heat management system for a power battery pack, wherein the heat management system includes a cooling circuitand a heating circuit; the cooling circuit is formed by a heat exchanger, a condenser and a liquid storage device and is connected to the battery pack; the heating circuit is formed by a heat exchanger, a bubble pump and a gas-liquid separator; a liquid outlet of the gas-liquid separator is connected with the liquid storage device by a pipeline. The liquid storage device is connected with the bubble pump by a pipeline to supplement a liquid cooling working medium for the bubble pump. The heat management system comprises the technical effects that high-efficient heat transfer is achieved, a heat exchange coefficient is greatly improved by working medium phase change heat transfer; compared with a traditional wind cooling heat transfer coefficient, the heat exchange coefficient is increasedby two orders of magnitude and is increased by one order of magnitude as compared with liquid cooling; and heat dissipation and cooling double circulation is achieved, heat dissipation circulation omits power components of a traditional liquid cooling system, and heat dissipation and heating are combined into a system, the structure is simpler and the operation is more reliable.

The invention relates to a fan coil temperature control device based on the pipe diameter matching relation between a fan coil and a water pipe and controlled by the return air temperature and the air supply volume. The fan coil temperature control device comprises the fan coil, an electric water valve, a controller and a control panel. A draught fan is arranged in the fan coil. The fan coil temperature control device is characterized in that the electric water valve is installed at the water inlet end of the fan coil; the model of the fan coil is matched with the pipe diameter of the water pipe so that the maximum limitation of the opening degree of the electric water valve can be controlled; the controller controls the opening degree of the electric water valve to be adjusted within the opening degree limiting range; a fan coil temperature control structure for automatically regulating the opening degree of the electric water valve according to the pipe diameter matching relation between the fan coil and the water pipe is formed; the control panel comprises multiple control signal output ends and feedback signal input ends, and a structure for automatically regulating the rotating speed of the draught fan and the opening degree of the electric water valve according to the return air temperature and the air supply volume is formed; and the model of the fan coil is FC800, or the model of the fan coil is FC400. According to the fan coil temperature control device, the maximum limitation of the opening degree of the eclectic water valve is controlled by the controller according to the pipe diameter matching relation between the fan coil and the water pipe, and the beneficial effects that the flow of the water pipe of the fan coil is accurately regulated and the stability of a chilled water system is improved are achieved.

A high-efficient heat exchange tube piece for a filler coupling coil evaporative condenser comprises a coil (1) formed of heat exchange tubes coiled into an S shape. The coil (1) is provided with at least one layer of filler (2) for guiding spraying cooling water to flow from an upper layer heat exchange tube to a lower layer heat exchange tube. The filler (2) is arranged between adjacent heat exchange tubes (11), and connects the heat exchange tubes (11) to form a continuous water flow surface. The heat exchange tube is capable of lowering the temperature of cooling water in a cooling coil, and improving water distribution coverage of cooling water sprayed from the cooling coil and the heat exchange efficiency.

The invention discloses a heat recovering fresh air machine which comprises a return air inlet, a return air channel, a fresh air channel, a heat exchange core body, a wet film and a water mist spraying device, wherein the return air channel communicates with the return air inlet; the heat exchange core body is used for realizing heat exchange between return air in the return air channel and fresh air in the fresh air channel; the wet film is arranged in the return air channel and is located in a part between the return air inlet and the heat exchange core body; the water mist spraying device is arranged in the return air channel and is located in a part between the wet film and the heat exchange core body; in the heat exchange core body, fresh air and return air flow in a cross flow manner and are separated through a hydrophilic aluminum foil, the fresh air is in direct contact with one face of the hydrophilic aluminum foil while the return air is in contact with another face of the hydrophilic aluminum foil, and the wet film and water mist generated by the water mist spraying device form a liquid thin layer on the surface of the other surface of the hydrophilic aluminum foil. By adopting wet film pre-cooling combined with indirect evaporative cooling, the heat recovering efficiency is improved. Compared with a conventional sensible heat recovering fan, the all heat recovery efficiency in a refrigerating working condition in summer can be increased from 30% to 80%, and the sensible heat recovery efficiency is increased from 65% to 140%.

The invention discloses an iron-containing red mud coal-based direct reduction process and system. Drying and levigating are carried out on red mud and high-volatile coal, blending is carried out on the red mud, the high-volatile coal, a binder and a metal aggregating agent according to the mass ratio of 1: 0.25-0.35: 0.01-0.03: 0.01-0.03, water is added for pelletizing after uniform mixing, carbon-containing pellets with particle size being 20 mm-25 mm are obtained; and the carbon-containing pellets are dried and then conveyed to a rotary hearth furnace, reduction roasting is directly carriedout, reducing is carried out on the red mud through H<2> generated through sufficient pyrolysis of the high-volatile coal and H<2> generated through a carbon gasification reaction with H<2>O as a gasifying agent, the hearth temperature is controlled to be 1250 DEG C-1280 DEG C, the roasting time is controlled to be 30 min-35 min, and the red mud can be sufficiently reduced. According to the iron-containing red mud coal-based direct reduction process and system, the red mud is efficiently reduced by adopting a hydrogen metallurgy process, and the iron-containing red mud coal-based direct reduction process and system have the advantages of high hearth heat transfer efficiency, high iron oxide reduction speed, high single-furnace capacity, high product quality and essential emission reduction.

The invention relates to the field of water storage heaters and discloses a solar gas composite energy water heating system. The system comprises a solar heater, a gas water heater, a water tank, a central hot water circulating circuit and a control system and is characterized in that the water tank comprises a constant temperature tank and a heat storage tank, wherein the constant temperature tank is directly connected with the central hot water circulating circuit, and the heat storage tank forms a solar circulating circuit with the solar heater. A first water outlet in the upper end of the constant temperature tank is connected with a water inlet of the gas water heater, and a first water inlet in the upper end of the constant temperature tank is connected with a water inlet of the gas water heater to form a heating and circulating circuit. A water outlet of the heat storage tank is connected with a second water inlet in the lower end of the constant temperature tank and a water inlet of the gas water heater. Compared with the prior art, the solar gas composite energy water heating system has the advantages that the solar utilization rate is high, the heating rate is high, and continuous large flow constant temperature water supplying capacity can be obtained through little heat output of a gas heating device. The invention further provides a control method based on the water heating system.

The invention discloses a heat exchange system of a demethanizer and a heat exchange method. The heat exchange system adopts one of the following manners: A, a branch separated from an outlet pipeline at the bottom of a 1# hydrogen-methane separation tank is connected with the demethanizer or a demethanizer return tank; B, an aftercooler is arranged at the top of the demethanizer return tank, and a branch separated from the outlet pipeline at the bottom of the 1# hydrogen-methane separation tank is connected with the aftercooler and then connected with the demethanizer return tank; C, a gas-liquid separation tank is arranged behind a cooling box, a gas phase outlet of the demethanizer return tank is connected with the cooling box and then connected with the gas-liquid separation tank, and the bottom of the gas-liquid separation tank is connected with the demethanizer return tank. Under the condition that the coolant level and compressor outlet pressure are unchanged, the gas phase at the top of the demethanizer return tank is cooled by use of local rich cold energy through reasonable optimization of matching of self cold energy of deep cooling, the heat transfer temperature difference of a condenser of the demethanizer is increased, and the loss of ethylene is reduced.

The invention discloses a rotary hearth furnace and electric furnace reduction treatment process for stainless steel dedusting ash. The process mainly comprises the steps that after being fully slakedand dried, the stainless steel dedusting ash is compounded and mixed with brown coal and a binding agent; a mixture is produced into carbon-containing pellets with the diameter ranging from 18 mm to25 mm; after being dried through a drier, the pellets are laid on the furnace bottom of a hydrogen metallurgy rotary hearth furnace, and the thickness of a fabric is controlled to range from 60 mm to70 mm; reduction is conducted on the pellets in the furnace for 50-60 minutes at the temperature of 1250-1280 DEG C, and Fe, Cr and Ni in the stainless steel dedusting ash can be obtained through reduction; and after being discharged through a discharging end of the rotary hearth furnace, a high-temperature reduction material in the hot state is directly delivered into an electric furnace for deepreduction and melting separation, and molten iron containing 4-6% of Ni, 10-15% of Cr and 0.5-1.0% of C can be obtained. By means of the process, metal materials, such as iron, nickel and chromium, in the stainless steel dedusting ash can be obtained through reduction at the low cost; the utilization rates of nickel and chromium raw materials are effectively increased; the yields of a nickel alloy and a chromium alloy are effectively increased; and meanwhile, environmental pollution is reduced.