360 results about "Inlet temperature" patented technology

The invention discloses a condensation-free efficient heat exchange control method and system for a full-premixing water heater, and the method comprises the steps: collecting the multi-source information, such as air inlet temperature, humidity, gas flow, flue gas oxygen concentration and wall temperature, in real time, calculating a predicted dew point based on a dynamic dew point prediction model, and setting a dynamic safety boundary; the condensation risk is judged by comparing the wall temperature with the safety boundary, and active intervention is carried out in a staged cooperation mode that fuel gas and air volume are continuously adjusted firstly and then a partial combustion zone sectioning valve is rapidly turned off; the system comprises a main controller, a mesh-shaped infrared radiation burner, a sectional valve assembly, a gas proportional valve, a frequency conversion fan and related sensors. According to the invention, the system runs close to the condensation boundary through intelligent control, and the advantage of high operation heat efficiency is realized on the premise of ensuring high reliability.

The invention relates to the technical field of new energy automobile heat management, and discloses a battery inlet water temperature-based dual-threshold decision-making method, which is realized through the following components: an intelligent collaborative decision-making center module, a multi-source data sensing acquisition module, a waste heat recovery and efficient heat exchange module, a precise execution driving module and a multi-level safety guarantee module. The intelligent collaborative decision center module comprises a heat management controller and an AI intelligent control unit; the multi-source data sensing and collecting module comprises a battery management system, a whole vehicle controller, an air conditioner controller and a full-dimension parameter monitoring sub-module. The waste heat recovery and efficient heat exchange module comprises a double-effect Chiller, an electronic expansion valve, a three-way valve and a four-way valve; the invention aims to solve the problems that energy consumption is increased and efficient circulation of energy cannot be realized due to the fact that waste heat generated in the operation process of components such as a motor cannot be fully excavated and reused and temperature control requirements are met by depending on additional heating or refrigerating components in the heat management of the existing new energy automobile.

The invention relates to the technical field of thermal power generation, in particular to a closed circulation cold end optimization method, device and system, and the method comprises the following steps: obtaining the historical operation data of a unit from a power plant monitoring information system, the data comprises circulating water flow, circulating water inlet temperature, circulating water outlet temperature, condenser backpressure water pump motor current, generator power, medium and low pressure heat supply steam flow, condenser steam-water temperature and condenser water inlet and outlet pressure; s2, performing abnormal value processing on the data obtained in the step S1, namely screening out an abnormal value, and repairing and filling the abnormal value by using an interpolation method; based on the actual condition of the power plant, the unit load and the steam admission amount of the condenser are fitted through a large amount of historical data in the step S2; the total power for starting different numbers of circulating water pumps and fans and the water flow corresponding to the circulating water pumps are determined according to the historical data in the step S2; respectively establishing a condenser model and a cooling tower model; constructing a circulating cooling system model, coupling the condenser model and the cooling tower model, carrying out iterative calculation until convergence or reaching the maximum number of iterations, and obtaining the condenser outlet water temperature, the cooling tower outlet water temperature, the condenser back pressure, the vacuum degree and the power generation power; fitting a correction coefficient curve by referring to the technical specification of a power plant and combining the historical data in the step S2 with the condenser backpressure-generated power correction coefficient graph; and calculating the generated power and the net output power according to the unit load and the auxiliary machine consumption, and outputting an auxiliary machine configuration scheme corresponding to the maximum net power.

The invention relates to the technical field of fuel cell control, in particular to a staged optimization control method for a fuel cell cold start-up process, which comprises the following steps of: acquiring output voltage and current of an electric pile and a cooling liquid inlet temperature signal in real time at the initial start-up stage, calculating a dynamic load impedance amplitude and inputting the dynamic load impedance amplitude into a polarization characteristic coupling estimation model; ohm, activation and concentration polarization voltage drop estimation values are obtained. And comparing the three types of estimated values with a preset polarization threshold to determine a polarization dominant stage, and calling corresponding temperature and humidity control parameters from a preset control strategy mapping table in combination with the cooling liquid inlet temperature. According to the method, polarization stages are accurately divided through polarization decoupling estimation, the control parameters are matched based on the mapping relation, the cold start control logic of the fuel cell is optimized, and the suitability of the cold start control of the stack and the actual operation state is improved.

The invention discloses a gas compressor test device and method, and belongs to the field of gas compressor tests.The gas compressor test device comprises a driver, and a driving shaft of the driver is used for being connected with a main shaft of a gas compressor; the unloading assembly comprises a balance drum, a high-pressure gas supply unit, an exhaust unit and an adjusting valve, the balance drum is used for being connected with a main shaft of the gas compressor and used for being connected with an impeller on the main shaft of the gas compressor, the high-pressure gas supply unit is used for being communicated between the balance drum and the impeller, and the exhaust unit is used for being communicated with the side, away from the impeller, of the balance drum; an inlet temperature sensor, an inlet pressure sensor and a flow sensor are arranged in the double-twisted-wire air inlet channel; an outlet temperature sensor and an outlet pressure sensor are arranged in the annular outlet throttler; and a controller. The technical effects of the invention lie in that the device not only facilitates the independent test of the related gas compressor, but also facilitates the small axial force of the impeller of the gas compressor borne by the thrust bearing.

The invention relates to the technical field of aero-engines, and discloses a starting oil supply rule control method and device for an unmanned aerial engine, and the method comprises the steps: obtaining the rotating speed and acceleration at a target moment and a historical moment, and judging whether a first switching condition is met or not; if yes, the inlet temperature of the power turbine at the target moment and the historical moment is obtained, and whether a second switching condition is met or not is judged; if yes, the fuel given quantity and the fuel feedback quantity are obtained, and whether a third switching condition is met or not is judged; if yes, judging whether a fourth switching condition is met or not based on the first time consumption, the second time consumption and the third time consumption; if yes, whether a fifth switching condition is met or not is judged based on the first time consumption, the second time consumption and the fourth time consumption; if yes, switching to a third starting stage in advance, and executing the oil supply rule of the third starting stage. Through multi-stage judgment, oil supply rules are timely and effectively switched, suspension protection is prevented from being triggered, and the starting success rate of the engine is increased.

The invention discloses a front feedback control long material precise cold control facility and a control method. The cold control facility comprises a cooling water inlet flow meter assembly, a membrane valve opening degree pneumatic power assembly, a cooling water flow adjusting valve set, a cooling water pressure measuring assembly, a cooling water temperature measuring assembly, a pneumatic stop valve power assembly, a cooling water pneumatic stop valve set, a pressure maintaining pneumatic stop valve set and a reverse blowing water pneumatic stop valve set. The device comprises a back-blowing compressed air valve group, a pressure-maintaining overflow water flowmeter assembly, a pressure-maintaining overflow valve assembly, a back-blowing air nozzle assembly, a back-blowing water nozzle assembly, a cooling water nozzle assembly, a rolled piece inlet temperature measurement assembly and a rolled piece outlet temperature measurement assembly. The rolling units are subjected to finite division, the neural network method is adopted to analyze the collected big data of the finite units and the boundary influence factors, the influence of the boundary influence factors on the temperature in the rolling process is accurately recognized, the accuracy of temperature control is effectively improved, the yield is improved, and the production cost is effectively reduced.

The disclosure provides a control method and device of an air supply equipment, an air conditioning equipment and a storage medium, and relates to the technical field of intelligent control. The method comprises the following steps: acquiring an inlet temperature and an outlet temperature of an air duct under a current working condition; determining a first temperature difference between the inlet temperature and the outlet temperature; acquiring a second temperature difference corresponding to the current working condition based on a factory parameter of the air duct; and correcting a working parameter of a compressor in the air supply equipment based on a size relationship between the first temperature difference and the second temperature difference. Thus, stable and reliable operation of the system can be ensured, and problems such as overloading of an indoor unit during heating, defrosting frequency reduction, shutdown or water blowing caused by a decrease in air volume can be avoided, thereby improving the user experience.

The application relates to the technical field of vehicle emission control, and discloses a vehicle regeneration prompting method, device, equipment, medium and program product. The method comprises the following steps: acquiring a multi-dimensional parameter value; judging whether the SCR urea crystallization amount exceeds a first threshold value of the crystallization amount according to the SCR mixer inlet temperature and a urea crystallization risk index; and when the SCR urea crystallization amount exceeds the first threshold value of the crystallization amount, entering a first prompting mode. According to the technical scheme, the regeneration demand can be prompted according to the SCR mixer inlet temperature and the urea crystallization risk index, the performance decline of the vehicle caused by the urea crystallization accumulation can be effectively prevented, and the reliability and operation efficiency of the vehicle emission system are improved.

A gas supply and carbon capture system, comprising an LNG tank, a BOG compressor set, a dual-fuel engine, a CO2 capture unit, a CO2 compressor, a heat exchanger, and a CO2 storage tank, wherein the LNG tank is used for storing liquid LNG, BOG formed at the inner top of the LNG tank is fed to a cold side of the heat exchanger; the heat exchanger is used for heat exchange between pressurized CO2 and the BOG, cold energy of the BOG is utilized to liquefy the CO2, the obtained liquid CO2 is stored in the CO2 storage tank, and the BOG having a higher temperature after the heat exchange is sent to the BOG compressor set; and the BOG compressor set is used for pressurizing the BOG having a higher temperature and then delivering the BOG to the dual-fuel engine for combustion, and the BOG compressor set employs normal-temperature compressors. By means of the system, the cold energy of the BOG from the LNG tank is fully utilized, and the temperatures of the BOG entering the BOG compressors are caused to meet an inlet temperature requirement of the normal-temperature compressors.

The invention relates to a diesel engine operation control method and a storage medium. The diesel engine operation control method comprises the steps that a reference fuel injection strategy of a diesel engine in a standard environment is obtained; determining a multi-cylinder combustion consistency correction strategy based on the consistency deviation of the combustion parameters of the cylinders during actual operation of the diesel engine to obtain a combustion consistency correction value; according to the air inlet temperature of the diesel engine and the temperature zone where the diesel engine is located, the drift diameter of an air release valve is determined and adjusted in a linkage mode, and an oil injection timing environment correction value is determined; based on the air inlet temperature and the operation time of the pressurization system, the oil injection timing compensation value of the part attenuating along with the performance is calculated; and based on the reference fuel injection strategy, the combustion consistency correction value, the fuel injection timing environment correction value and the fuel injection timing compensation value, fuel injection timing of operation of the diesel engine is determined. The actual air inlet requirements of all environments and all working conditions can be met, and the economical efficiency is improved without sacrificing the dynamic property.

This invention provides a low-temperature flow resistance testing device for microchannel radiators, comprising a control device and a testing device. The control device includes a temperature environment chamber, an electric valve, a manual valve, a filter, a check valve, and a computer. The testing device includes a temperature sensor, a pressure transmitter, and a differential pressure transmitter. This invention enables the testing of microchannel radiators under various low-temperature conditions, automatically adjusting the liquid coolant flow rate and inlet temperature according to set requirements during the testing process. This invention eliminates the drawbacks of manual control of various parameters, simultaneously satisfying low-temperature flow resistance testing under various conditions, thus improving the accuracy and efficiency of the test.

The application provides a control method and device, electronic equipment and storage medium, and relates to the technical field of human-computer interaction. The method comprises the following steps: firstly, in response to a temperature demand instruction input by a user, a high-voltage heater and a compressor are started in sequence; then, an in-cabin temperature, a warm air core inlet temperature and an ambient temperature collected by a sensor are acquired, and a PID control power of the high-voltage heater and a PID control rotating speed of the compressor are determined according to an air conditioner target temperature, the in-cabin temperature and the warm air core inlet temperature; finally, the operating power of the high-voltage heater is increased from an initial operating power to the PID control power, and the operating rotating speed of the compressor is increased from an initial operating rotating speed to the PID control rotating speed. In the application, the operating power control of the high-voltage heater and the rotating speed control of the compressor are automatically adjusted in real time by starting the high-voltage heater and the compressor in sequence, so that the vehicle-mounted heat pump air conditioning system can consider both the temperature control timeliness and the energy saving during operation.

The application belongs to the technical field of aero-engines, and particularly relates to a method for controlling water flow of a multi-pipeline ejection pre-cooling system of an aero-engine. The water flow of the multi-pipeline is allocated by a digital electronic controller, and each pipeline is independently controlled. The given value of the water supply is calculated by means of temperature deviation, closed-loop control is realized, and the fitting degree of the water injection amount and the required cooling amount is improved. Through the feedback of the inlet temperature, the dependence on the control accuracy of the water metering valve can be reduced. Even if the metered water is inaccurate, it can be compensated through temperature closed-loop adjustment, the industrial requirements of the valve and the electro-hydraulic servo valve are reduced, and the production cost is reduced.

This application belongs to the field of aero-engine technology, and specifically relates to a method and apparatus for simulating aircraft bleed air during sustained test of a turbofan engine, wherein the inlet temperature T1 and inlet pressure P1 of the engine are preset to a range; Step S2: Calculate the aircraft bleed air volume W fy The range, the total bleed air temperature T of the aircraft fy The range and total bleed air pressure P fy Range; Step S3: Calculate the cold diameter D of the bleed air nozzle. fy Range; Step S4: Select the cold-state diameter D of the bleed air nozzle fy An aircraft bleed air volume verification test was conducted to obtain the bleed air volume W for the test. fyr When the induced draft volume W in the experiment fyr The requirements are met, and the cold-state diameter D of the expiratory air nozzle is adopted. fy When the induced draft volume W in the experiment fyr If the requirements are not met, return to step S4; ensure that the calculation error of the aircraft bleed air volume is within the required range, and obtain the actual bleed air volume of the engine in various states to the maximum extent through test program design. This test method has the advantages of simple test method, low test cost and high replacement efficiency.

The invention relates to a fast heating fuel cell system and a control method, in the fuel cell system, air is divided into three paths after being pressurized by a fan, one path of air enters a stack cathode after absorbing heat from a combustor through an air preheater, and the other path of air directly enters a stack for adjusting the inlet temperature of the stack cathode; the other path absorbs secondary waste heat of the anode tail gas through an air cooler, and enters a stack cathode after being secondarily preheated by an air preheater; the cathode tail gas is heated by a combustor, then subjected to primary heat release by an air preheater and subjected to secondary heat release by CPOx; fuel is fed into CPOx through a circulating pump to be mixed with gas from an air preheater for a catalytic oxidation reaction, and after the reaction, primary waste heat of anode tail gas is absorbed through an anode tail gas cooler, and then the fuel enters an electric pile fuel side; anode tail gas is divided into two paths after primary heat release through the anode tail gas cooler, one path enters the combustor to be heated, and the other path returns to the circulating pump after secondary heat release through the air cooler.

The application discloses a turbofan engine inlet temperature simulation temperature field online monitoring method, which comprises the following steps: expanding the temperature field section of the engine inlet channel according to the polar coordinates, dividing the temperature field section into m parts along the circumferential direction clockwise and dividing the temperature field section into n equal parts along the radial direction, so as to obtain an m*n grid area, each grid area represents the temperature value of a unit body, and the temperature value of each unit body is obtained; the radial average temperature of each angular position and the surface average temperature of the temperature field section are obtained according to the temperature value of each unit body; the circumferential range of the high-temperature zone is determined according to the distribution of the area-weighted radial average value measured at different radii on the aerodynamic interface along the circumferential direction, the average value of the airflow temperature in the high-temperature zone is calculated, the temperature field unevenness and the temperature distortion intensity are calculated according to the average value of the airflow temperature in the high-temperature zone, and at least one of the circumferential range of the high-temperature zone, the average value of the airflow temperature in the high-temperature zone, the temperature field unevenness and the temperature distortion intensity is displayed in real time.

Embodiments of the present disclosure relate to a method, an apparatus, a controller and a computer program product for determining a stack state. The method comprises triggering a first timer in response to a coolant pump of a fuel cell of a vehicle being started based on a start request of the vehicle. The method further comprises determining a second target time for a second timer based on an ambient temperature and an outlet temperature of the stack in response to the first timer reaching a first target time. Moreover, the method further comprises determining the stack state of the fuel cell of the vehicle based on the outlet temperature of the stack and an inlet temperature of the stack in response to the second timer reaching the second target time. In this way, the accuracy of the stack state determination is improved by the mixing of the coolant pump and the mechanism of the two-stage timer, and thus triggering the corresponding start mode, which not only improves the safety of the fuel cell start, but also improves the start efficiency and reduces unnecessary losses.

The invention discloses an air-cooled heat exchange system adaptable to crosswind and a control method thereof.The system comprises an air-cooled heat exchanger, a differential pressure sensor, a fan and two temperature sensors, the fan is arranged on the outer side or the inner side of the air-cooled heat exchanger, and the fan can form a forward working mode or a reverse working mode; the pressure difference sensor detects the air pressure difference between the external environment air pressure outside the outer side of the air-cooled heat exchanger and the air pressure inside the air-cooled heat exchanger, the two temperature sensors detect the temperature of the inlet end and the outlet end of the air-cooled heat exchanger respectively, or one temperature sensor detects the temperature of the outlet end of the air-cooled heat exchanger, and the other temperature sensor detects the temperature inside the air-cooled heat exchanger. The differential pressure sensor, the air-cooled heat exchanger outlet end temperature sensor, the air-cooled heat exchanger inlet end temperature sensor and the fan are electrically connected with the control system. In the control method, the control system controls the fan to work according to the air pressure difference and the temperature difference of the two sensors. According to the invention, the system can run stably when encountering crosswind.

The invention discloses an on-line controlled cooling process for a Q345B medium-thick-wall seamless steel pipe. The rolling process comprises the following steps: heating in an annular furnace, punching, continuous rolling, sizing, on-line controlled cooling, cooling in a cooling bed and finishing; the heating system of the annular furnace is limited; the roller way speed is set to be 0.6-1.0 m / s, 16 groups of spraying pipes spray water normally, the total maximum instantaneous flow is 880-900 m / h, the water temperature is 35-40 DEG C, the supercooling time is 38-42 s, the inlet temperature is 950-970 DEG C, the outlet temperature is 520-580 DEG C, and the cooling speed is 9.25-11.25 DEG C / s. According to the on-line controlled cooling process for the Q345B medium-thick-wall seamless steel pipe, the wall thickness of the medium-thick-wall seamless steel pipe is 12-25 mm, off-line heat treatment is replaced with the on-line controlled cooling process, and the mechanical property required by Q345B is achieved.

The present application relates to iron-making blast furnace metallurgical technology field, especially a kind of blast furnace powder system temperature automatic control method, comprising the following steps: step one, according to whether the inlet temperature of mill, mill outlet temperature exceeds upper limit, adjust flue gas furnace gas flow set value;Step two, flue gas furnace air regulating valve automatic control, according to gas regulating valve flow set value and set air-fuel ratio calculation air regulating valve air flow set value;Step three, coal feeder coal supply amount automatic control.The present application when gas pressure, calorific value change, or raw coal composition change leads to mill inlet and outlet temperature change, automatically adjust flue gas furnace gas flow, air flow and coal feeder coal supply amount, control mill inlet and outlet temperature, reach the goal of system temperature stable, suitable for wide promotion.

The invention discloses a heating stove and an operation method thereof. The heating stove comprises a box body, and a containing cavity is formed in the box body. The gas furnace is mounted in the accommodating cavity; the gas supply and exhaust pipe assembly is internally provided with a smoke exhaust channel and an air inlet channel, the smoke inlet end of the smoke exhaust channel is communicated with a smoke exhaust port of the gas furnace, the smoke exhaust end of the smoke exhaust channel is communicated with the atmospheric environment outside the box body, and the air inlet end of the air inlet channel is communicated with the atmospheric environment outside the box body; the air exhaust end of the air inlet channel is communicated with the accommodating cavity; the air inlet temperature sensor is installed in the air inlet channel and used for detecting the real-time air inlet temperature in the air inlet channel; the smoke exhaust temperature sensor is installed in the smoke exhaust channel and used for detecting the real-time temperature in the smoke exhaust channel; or the smoke exhaust temperature sensor is installed in the smoke exhaust port and used for detecting the real-time smoke exhaust temperature in the smoke exhaust port.

The invention discloses a lubricating system capable of replacing a filter element and a cooling element on line and a using method thereof. The lubricating system comprises a lubricating oil tank, an oil pump device, an oil cooling device, a temperature control valve, an oil filtering device, an inlet oil temperature change device and main equipment. The lubricating oil tank communicates with one end of the oil pump device, the other end of the oil pump device communicates with an oil inlet of the oil cooling device and the inlet end of the temperature control valve, and then lubricating oil is conveyed to the oil cooling device for heat exchange cooling. An oil outlet of the oil cooling device is communicated with the inlet end of the temperature control valve in a sealed mode, the outlet end of the temperature control valve is communicated with an oil inlet of the oil filtering device, and then lubricating oil is controlled at the set temperature at the temperature control valve and then conveyed to the oil filtering device to be filtered. An oil outlet of the oil filter device is in sealed communication with an oil inlet of the main equipment through an inlet oil temperature change, and an oil outlet of the main equipment is in sealed communication with the lubricating oil tank, so that a lubricating oil loop is formed, and lubricating oil is provided for the main equipment. According to the invention, non-stop maintenance, zero leakage in operation and zero pollution in emission are fundamentally realized.

The application relates to a performance analysis method of an advanced adiabatic compressed air energy storage system, which comprises the following steps: when the application scene is determined, the inlet pressure and temperature of a first compressor, the outlet pressure of a last compressor, the inlet pressure of a first expander and the outlet pressure of a last expander are known; the outlet temperature of the first compressor, the outlet temperature of the first expander, the pinch point temperature difference of a heat exchanger, the isentropic efficiency of each compressor and expander, the compressed mass flow, the compression time length, the expanded mass flow, the expansion time length are unknown; the outlet temperature of the last compressor, the inlet temperature of the first expander, the outlet temperature of the last expander and the polytropic efficiency of each compressor and expander are dependent variables of the known and unknown parameters; according to the relationship among the parameters, the compression power, the expansion power and the electric-to-electric efficiency are theoretically calculated, and the optimal scheme of the system performance of the advanced adiabatic compressed air energy storage is obtained in the shortest time cost and the least calculation cost.

A system and method for controlling transition of a fuel cell vehicle from a normal operating mode to a hot operating mode having a fuel saving operating mode is described. The method comprises determining a required value of a traction power from the fuel cell system for the fuel cell vehicle; determining a net electric power output value of the fuel cell system based on a fuel cell system power output and a cooling electrical power value; and controlling the fuel cell vehicle to transition from the normal operating mode to the hot operating mode via a first transition mode or via a second transition mode so that the net electric power output value is equal to the required value of the traction power and a coolant inlet temperature at a coolant inlet of a fuel cell stack of a fuel cell system of the fuel cell vehicle is equal to a hot coolant temperature.

The invention relates to the technical field of compressor protection, and discloses an automobile air conditioner compressor protection device which comprises a protection shell, a plurality of fixed arcs are fixedly connected to the inner wall of the protection shell, a water conveying cavity is formed in each fixed arc, and two sealing blocks are slidably connected to the interior of each water conveying cavity. And one sides of the two sealing blocks fixedly communicate with connecting pipes, a stainless steel hose fixedly communicates between the two connecting pipes, and a telescopic arc is fixedly connected between the two sealing blocks. Through cooperative use of the fixed circular arc, the telescopic circular arc, the sealing block, the connecting pipe, the stainless steel hose and other structures, cooling liquid is injected into the sealing water conveying cavity surrounding the body and circulates, the working heat of the compressor is directly and efficiently absorbed and discharged through the water outlet pipe, and the situation that in the high-temperature environment of an engine compartment, traditional air cooling is not affected is avoided. And the heat dissipation efficiency is low due to high air inlet temperature and small temperature difference.

The utility model discloses a coal gas pressure stabilizing control device for a blast furnace coal injection and pulverizing system. A waste gas pipeline is provided with a waste gas fan, a waste gas electric regulating valve, a waste gas flowmeter and a waste gas pressure transmitter; a coal mill inlet temperature thermal resistor and a coal mill inlet pressure transmitter are arranged on the outlet pipeline; a coal gas pressure transmitter, a coal gas flowmeter and a coal gas electric control valve are arranged on the coal gas pipeline, and an outlet temperature thermocouple and an outlet pressure transmitter are further arranged on the outlet pipeline; a waste gas carbon monoxide detector and a waste gas oxygen content detector are arranged on the waste gas pipeline; and a gas pneumatic quick switching valve, a gas electric blind plate valve, a gas electric butterfly valve and a carbon monoxide heat conduction type gas analyzer are arranged on the gas pipeline, and the number of the gas electric control valves is larger than or equal to two. According to the utility model, the gas regulating valve or the bypass pipeline three-valve group is additionally arranged, so that a monitoring instrument is perfected, and the gas flow and pressure are accurately controlled.

This application relates to a device for reducing the energy consumption of a reciprocating compressor in a light hydrocarbon recovery unit. The device includes a feed gas compressor, a desulfurization tower and a molecular sieve tower connected to the feed gas compressor, a first expander connected to the molecular sieve tower, and a cold box connected to one side of the first expander. A second expander is disposed between the feed gas compressor and the desulfurization tower, and the pressurization ends of the feed gas compressor and the second expander are in relative communication. A circulating cooling device is also provided between the feed gas compressor and the desulfurization tower. This application reduces the outlet pressure of the reciprocating compressor and the inlet temperature of the feed gas in the cold box of the light hydrocarbon recovery unit, thereby reducing the energy consumption of the reciprocating compressor and improving the operating efficiency and yield of the light hydrocarbon recovery unit.

An exhaust control system for a vehicle includes at least one temperature sensor positioned within an exhaust system of the vehicle, the at least one temperature sensor configured to generate a measurement signal indicative of at least one of an inlet temperature and an outlet temperature of a diesel oxidation catalyst (DOC). An exhaust control module is configured to turn on an exhaust burner to heat exhaust gas flowing through the exhaust system, determine a total stored heat within the DOC based in part on the measurement signal, turn off the exhaust burner after turning on the exhaust burner based on an upper threshold of the total stored heat, and turn on the exhaust burner after turning off the exhaust burner based on a lower threshold of the total stored heat, wherein the lower threshold is less than the upper threshold.