189 results about "Cooling water temperature" patented technology

The invention provides a wind-water linkage energy-saving control system for an urban rail transit underground station. The wind-water linkage energy-saving control system comprises a management layer; the control layer is divided into three relatively independent and expandable cooperative control subsystems capable of independently acquiring information according to the type of equipment, the control layer comprises a large system cooperative control subsystem, a small system cooperative control subsystem and a water system cooperative control subsystem, and the cooperative control among the cooperative control subsystems is completed by the management layer platform; a control strategy of the urban rail transit underground station wind-water linkage energy-saving control system comprises a system calendar scheduling strategy; a system control strategy; comprising a large system air conditioner adding strategy, a large system air conditioner reducing strategy, a water system starting working condition setting strategy, a water system operation working condition switching strategy, a cooling water temperature difference optimization setting strategy, a chilled water temperature difference optimization setting strategy, a most unfavorable tail end pressure difference setting strategy, a most unfavorable tail end pressure difference control strategy and a water chilling unit adding strategy. A water chilling unit reduction strategy, a water chilling unit alternation strategy and a water chilling unit operation load balancing strategy; and the system cooperative control comprises one-key startup of the water chilling machine room, one-key shutdown of the water chilling machine room, one-key startup of the water chilling unit, one-key shutdown of the water chilling unit, automatic addition of the water chilling unit and automatic reduction of the water chilling unit.

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 invention discloses a fuel injection method and device of an engine, a vehicle and a storage medium, a cylinder cover of the engine is provided with a fuel injector, a glow plug is arranged below an air inlet channel, the fuel injector is configured to inject fuel into a combustion chamber of the engine, and the glow plug is configured to heat the combustion chamber of the engine. The method comprises the steps that under the condition that an engine starting instruction is received, the cooling water temperature of an engine is obtained; under the condition that the temperature of the cooling water is smaller than or equal to a first preset temperature threshold value, the glow plug is controlled for heating; and under the condition that the temperature of the glow plug reaches the second preset temperature threshold value, the motor of the vehicle is controlled to drag the engine to rotate at the preset rotating speed, and the fuel injector is controlled to conduct single-time injection into the combustion chamber in the later period of the compression stroke. According to the fuel injection method, the problem that single-fuel cold start of the methanol engine is difficult in cold weather can be solved, the success rate of cold start of the engine is increased, and the cost can be reduced.

The utility model provides a cable cover cooling device and a pre-cooling structure, comprising a pre-cooling assembly 1, a pre-cooling box 1 used for realizing air cooling pre-cooling is arranged in the pre-cooling assembly 1, and the right side of the pre-cooling box 1 is fixedly connected with a pre-cooling box 2. Compared with the prior art, the beneficial effects of the utility model are that the pre-cooling assembly I and the pre-cooling assembly II are added, the pre-cooling assembly I and the pre-cooling assembly II are arranged in a left-right manner, and the cable is subjected to wind power guiding and supplying action in a circumferential manner through the three groups of annular air cooling grooves, so that uniform wind cooling action is uniformly performed on the cable; according to the cable cooling device, the cable is arranged in the cooling tank and is pre-cooled for the second time through the cooling water atomized by the atomizing nozzle, then the cable is arranged in the cooling tank to be cooled for the third time, and the four groups of corner water pipes are arranged at four corners to form water flow to reduce the temperature difference of the cooling water, so that the cooling uniformity can be improved; therefore, waste heat can be recycled for auxiliary heat preservation.

The invention discloses an algae removal control method and system for a cooling water system of a cooling unit, and the method comprises the steps: calculating a reference dosing duration according to the total water capacity of the system, a preset target agent concentration and the dosing rate of dosing equipment; the actual load, the cooling water temperature and the environment temperature of the cooling unit are collected in real time; according to the actual load and the cooling water temperature, whether the dosing condition is met currently is judged; and after it is judged that the dosing conditions are met, based on a pre-constructed calculation model, the corrected dosing duration under the current working condition is obtained through calculation with the reference dosing duration, the actual load rate of the cooling unit, the temperature correction coefficient corresponding to the cooling water temperature degree and the environment correction coefficient corresponding to the environment temperature as calculation parameters. According to the method, a multi-parameter coupling calculation mode is adopted, so that the corrected dosing duration can closely follow the fluctuation of actual working conditions, the stability of the algae removal effect is ensured, and biological slime adhesion and heat exchange efficiency reduction caused by insufficient chemicals are effectively prevented.

The embodiment of the utility model provides a kind of water cooling system and laser direct imaging equipment, it is related to laser direct imaging equipment technical field.The water cooling system of laser direct imaging equipment includes water cooling machine, water cooling part and temperature regulating device.Water outlet main pipe and water inlet main pipe are connected on water cooling machine.Multiple water cooling parts are respectively installed on multiple heat-generating parts.Water cooling part is communicated with water outlet main pipe by first branch pipe.Water cooling part is also communicated with water inlet main pipe by second branch pipe.Temperature regulating device is installed on water cooling part.Temperature regulating device is used to adjust the temperature of cooling water into water cooling part.The utility model can adopt a set of water cooling machine to carry out accurate temperature control to multiple heat-generating components in laser direct imaging equipment simultaneously, improve equipment stability, without multiple water cooling machine equipment, reduce equipment cost.

The invention discloses a concrete stirring refrigeration energy efficiency optimization control method and system, and relates to the field of stirring refrigeration control, and the method comprises the steps: firstly, carrying out the thermodynamic analysis of the environment temperature and humidity and the real-time load of a water chilling unit, and determining a cooling water temperature dynamic search space with the environment wet bulb temperature as the lower limit; on the basis, estimated power consumption of a cooling tower fan and a water chilling unit compressor at different cooling water temperature points is simulated by utilizing a dual-equipment energy consumption response prediction model, and a golden temperature point capable of enabling the total power consumption of the system to reach the minimum is positioned through global optimization. And finally, with the global optimal set temperature value as a target, the frequency of the fan is adjusted through PID control. According to the scheme, island type control logic is broken through, environmental potential and equipment characteristics are deeply fused, the energy consumption game relationship between the fan and the compressor is balanced in real time, and it is ensured that the refrigerating system always keeps the optimal comprehensive energy efficiency of the whole system under changeable climates and loads.

The utility model provides a slag rake cooling water temperature and liquid level self-adjusting device, which relates to the technical field of steelmaking converters and comprises a cold water inlet pipe leading to the inside of a cooling water tank and a hot water discharge pipe arranged below the side wall of the cooling water tank and communicated with the inside of the cooling water tank, a water inlet valve is arranged on the cold water inlet pipe, and a water discharge valve is arranged on the hot water discharge pipe. The first support is provided with a liquid level sensor, the second support is provided with a thermodetector, the outer wall of the cooling water pool is provided with a control box, and the water inlet valve, the water drainage valve, the liquid level sensor and the thermodetector are all electrically connected with the control box. The cold water inlet pipe is provided with the water inlet valve, the hot water discharge pipe is provided with the water discharge valve, the liquid level sensor is arranged to measure the liquid level, and the thermometer is arranged to measure the temperature of pool water, so that the water inlet valve and the water discharge valve can be automatically controlled by the control box to act, and automatic cold water filling and hot water discharge are realized; and the water level and the water temperature in the cooling water tank are kept stable.

The invention relates to an electric vehicle which can perform thermal protection of a power converter without adding a sensor. In an electric vehicle having a power source, a power converter, and a travel motor, the necessity of power limitation of the power converter is calculated on the basis of a motor coil temperature, a cooling water temperature, and an ATF oil temperature obtained from various sensors, and the power limitation is performed when the power limitation is required.

The invention discloses a roof bolter water-gas deslagging automatic switching control protection system and digging and anchoring complete equipment. The roof bolter water-gas deslagging automatic switching control protection system comprises a water-gas switching valve group, a gas inlet supply system, a water inlet supply system and an alarm display device. The water-gas switching valve group is used for switching between two working positions according to the conditions of air inlet pressure, water inlet pressure and cooling water pressure; and the water inlet supply system is independently communicated to enable the onboard roof bolter to carry out water deslagging, or the water inlet supply system and the air inlet supply system are simultaneously communicated to enable the onboard roof bolter to carry out water-air mixed deslagging, or the air inlet supply system is independently communicated to enable the onboard roof bolter to carry out air deslagging. And the alarm display device is used for displaying different abnormities and giving an alarm according to the air inlet pressure, the water inlet pressure, the cooling water pressure, the cooling water temperature, the return water pressure and the return water temperature under the action of the master control system. The system is wide in application range, the construction efficiency is improved, operation is simple and flexible, and monitoring and system protection are comprehensive.

The purpose of the present invention is to achieve more efficient energy output control in a railway vehicle that travels using a hybrid power source. A power control system (100) for a railway vehicle is provided with: a fuel cell (32) capable of outputting power for driving a main motor (50) and auxiliary equipment (70) of a railway vehicle (1); a battery (22) capable of storing power using the output of the main motor (50) or the fuel cell (32), and capable of outputting power for driving the main motor (50) and the auxiliary device (70) by discharging; and a control device (10) for switching the operation modes of the fuel cell (32) and the storage battery (22) on the basis of the charging rate of the storage battery (22), the speed of the railway vehicle (1), and the cooling water temperature of the fuel cell (32).

The application discloses an intelligent pipe cooling circulation control system and method based on ship lock construction, which comprises the following steps: dividing a ship lock construction structure into A pipe cooling circulation control subareas; covering the A pipe cooling circulation control subareas by B cooling circulation pipelines; receiving multi-dimensional data of each pipe cooling circulation control subarea by each edge key control node, and transmitting the data to a cloud cooling control service; after receiving the data, the cloud cooling control service generates A cooling circulation load demand risk coefficients based on a first deep learning algorithm; if it is judged that at least one of the A cooling circulation load demand risk coefficients is at risk, then the B cooling circulation pipelines are subjected to pipe cooling circulation control based on a second algorithm, and a PID control algorithm is used to adjust the cooling water flow and the cooling water temperature of the pipelines; the application realizes precise pipe cooling circulation control adjustment, improves the ship lock construction quality and reduces the risk of concrete hardening cracking through deep learning algorithm prediction and monitoring and the introduction of an unmanned aerial vehicle for the inspection of the outer surface of the cooling pipe.

The invention relates to the technical field of vehicle intelligent management, and discloses a vehicle thermal management method and device, and the method comprises the steps: obtaining first temperature data of a range extender unit and second temperature data of a heated unit; wherein the first temperature data refers to the temperature of cooling water at an outlet of a heat dissipation loop when the range extender unit works; the second temperature data is the temperature of a virtual convergence point in the heat exchange loop of the heated unit; the virtual convergence point is any point between the heat exchange outlet of the heated unit and the inlet of the flow control unit; and the target opening degree of the flow control unit is determined based on the first temperature data and the second temperature data, and the range extender unit is used for conducting heat management on the heated unit. By obtaining the direct measurement temperature of the range extender unit and the virtual calculation temperature of the heated unit, introduction of waste heat of the range extender is accurately controlled. And through closed-loop control logic, the control precision and responsiveness of the system are improved, so that the energy efficiency level of thermal management of the whole vehicle is improved.

The application discloses a sintered Nd-Fe-B magnet material and a preparation method and application thereof. The preparation method comprises the following steps: smelting, casting, crushing, forming, sintering and aging treatment of raw materials; the casting adopts a rapid solidification casting method; the rotating speed of copper is 2-4 m / s, and the cooling water temperature is 5-15 DEG C; the raw materials of the sintered Nd-Fe-B magnet material comprise the following components: B, 0.88-0.93%; X, 0.05-0.45%, X is Zr and / or Ti; Ga, 0.3-0.7%; Y, 28-31%, Y is Pr and / or Nd; Z, 0-2%, Z is Dy and / or Tb; Cu, 0.2-1%; Co, 0-1%; Al, 0-1%; and Fe, the balance. The sintered Nd-Fe-B magnet material has high mechanical strength, and the yield rate during machining can be reduced, so that the machining cost is reduced.

The embodiment of the application provides a motor cooling method and device, the method comprises the following steps: in the case that the working temperature of the motor is in the normal running temperature range, obtaining target adjustment temperature values at different positions in the motor running link, determining a cooling strategy corresponding to the target adjustment temperature values according to the target adjustment temperature values and the working state of the motor running; controlling the cooling system to execute the cooling strategy, so that the working temperature of the motor is in the normal running temperature range. The embodiment of the application can obtain different temperature values in the motor running link in real time, so that the cooling strategy can be determined in advance according to the obtained temperature values and the working state of the motor running, and the cooling water temperature can be adjusted in real time according to the cooling strategy, so that the motor can be ensured to be in a specified temperature range, time is saved, and cost is reduced.

The utility model provides a gummed steel wire cooling water tank which comprises a main tank body, a first partition plate, a second partition plate and a third partition plate are fixedly installed in the main tank body, the heights of the first partition plate, the second partition plate and the third partition plate are sequentially increased from left to right, and wire guide wheels are installed on the tops of the first partition plate, the second partition plate and the third partition plate in a butt joint mode. The interior of the main tank body is divided into a first cooling cavity, a second cooling cavity, a third cooling cavity and a fourth cooling cavity through a first partition plate, a second partition plate and a third partition plate, an auxiliary tank body is fixedly installed on the rear side of one side of the main tank body, a cover plate is movably installed at the top of the auxiliary tank body, and a water blowing assembly extending into the auxiliary tank body is installed at the bottom of the cover plate in a butt joint mode. The cooling water is subjected to stepped diversion cooling through the four groups of cooling cavities in the main tank body, so that the sectional cooling operation on the steel wire is realized, the cooling effect reduction caused by consistent temperature of the cooling water in the tank body is avoided, and the cooling tank is more remarkable and effective compared with the traditional cooling tank.

The application discloses a control method of a harvesting machine diesel engine reversing fan, characterized in that: the control method comprises a manual control mode and / or an automatic control mode. According to the cooling liquid temperature of the engine, the control method of the designed relay is used to control the working of the forward and reverse fan clutch, so that the forward and reverse rotation and stop of the fan are realized. The control can realize the fan stop in the starting condition and the low-temperature condition, reduces the accessory consumption power of the fan, improves the starting ability of the whole vehicle and reduces the fuel consumption, achieves the purpose of removing the residual chippings of the radiator of the harvesting machine and avoiding high-temperature faults, and has the energy-saving function. In addition, the time of the forward rotation and the reverse rotation is automatically corrected and controlled according to the cooling water temperature of the engine, the air inlet temperature and the rotating speed, so that the automation and the intelligent level of the engine and the whole vehicle are improved.

The invention belongs to the technical field of nuclear power plant operation control, and particularly relates to a nuclear power plant seawater plate heat exchanger pressure difference and temperature control system and method. An equipment cooling water outlet of the plate heat exchanger is provided with an equipment cooling water thermometer, and a plate heat exchanger bypass pneumatic control valve and a plate heat exchanger differential pressure gauge are arranged between a seawater inlet and a seawater outlet of the plate heat exchanger in parallel. A seawater inlet of the plate heat exchanger is respectively connected with the plate heat exchanger positive flushing inlet pneumatic isolating valve and the plate heat exchanger back flushing outlet pneumatic isolating valve, and a seawater outlet of the plate heat exchanger is respectively connected with the plate heat exchanger positive flushing outlet pneumatic isolating valve and the plate heat exchanger back flushing inlet pneumatic isolating valve. Automatic backwashing of the plate heat exchanger can be achieved, impurities on the seawater side in the plate heat exchanger can be washed away, and the temperature of cooling water of equipment can be controlled to be not lower than the temperature limit value required by design in winter.

A cooling water temperature control method, includes: calculating thickness of a water film remaining on a steel sheet; calculating a change in the thickness of the water film; calculating a change in temperature of the steel sheet; calculating a steel sheet temperature on an exit side of a draining roll at which a position where the thickness of the water film on the steel sheet becomes zero coincides with an exit side position of a drying equipment, and setting the calculated temperature to a lower limit value; calculating a steel sheet temperature on the exit side of the draining roll at which the steel sheet temperature on the entrance side of coating equipment coincides with a predetermined temperature and setting the calculated temperature to an upper limit value; and controlling the temperature of cooling water within a range of the lower limit value and the upper limit value.

Method for operating a cooling system (10) of a ship, wherein the cooling system (10) comprises a seawater subsystem (11) with a seawater pump (14a, 14b) and at least one first cooling water circuit (13); wherein the seawater subsystem (11) and the first cooling water circuit (13) are coupled via a heat exchanger (12) such that in the region of the heat exchanger (12) the cooling water of the first cooling water circuit (13) is cooled by the seawater of the seawater subsystem (11); and wherein the first cooling water circuit (13) has a bypass (17) to the heat exchanger (12) coupling the seawater subsystem (11) and the first cooling water circuit (13) and a control valve (18) whose position determines which portion of the cooling water of the first cooling water circuit (13) is routed through the heat exchanger (12) and which portion of the cooling water of the first cooling water circuit (13) is routed through the bypass (17), wherein the position of the control valve (18) is regulated such thatthat a supply cooling water temperature, which is established by mixing the cooling water portion routed through the heat exchanger (12) and the cooling water portion routed through the bypass (17), corresponds to a corresponding setpoint. The speed of the seawater pump (14a, 14b) of the seawater subsystem (11) is controlled depending on the position of the control valve (18) of the first cooling water circuit (13), the position of which determines which cooling water portion of the first cooling water circuit (13) is routed through the heat exchanger (12) and which cooling water portion of the first cooling water circuit (13) is routed through the bypass (17), wherein the first cooling water circuit (13) comprises a cooling water pump (28a, 28b), a low-temperature charge air cooler (26), at least one cooler (32) for cooling at least one further assembly, and another control valve (30).via whose switching position a cooling water portion of the first cooling water circuit (13) routed via the low-temperature charge air cooler (26) can be adjusted, The speed of the cooling water pump (28a, 28b) of the first cooling water circuit (13) is regulated depending on the position of the control valve or each control valve (18, 30) of the first cooling water circuit (13).

The invention relates to the technical field of pressure relief early warning, in particular to a hydrogen-oxygen generator emergency pressure relief early warning system integrated with intelligent sensing fusion. The environment interference temperature difference contribution degree is obtained according to the environment temperature change degree at each moment and the correlation strength between the environment temperature change and the cooling water temperature change in the environment interference time period; obtaining a net risk change rate according to the deviation degree of the cooling water temperature difference change at each moment relative to the theoretical expectation; correcting the difference between the net risk change rate and the environmental interference temperature difference contribution degree at each moment by using the abnormal state of the cooling water at each moment, and obtaining a risk increment; and carrying out emergency pressure relief early warning on the hydrogen-oxygen generator at the current moment according to the risk increments at all moments in the working period. According to the method, theoretical analysis, environment interference compensation and data reliability are integrated, interference caused by heat production power fluctuation and cooling water flow abnormity is restrained, and the reliability of system early warning is improved.

The invention discloses a control method and device of a cooling system and a readable storage medium, and relates to the technical field of equipment control. The control method of the cooling system comprises the steps that when the cooling system cools steel in the hot rolling process, a target production parameter set of the steel is obtained; obtaining a target water supply scheme corresponding to the target production parameter set, wherein the target water supply scheme is an execution scheme for providing cooling water for steel by a cooling system; environment state data of the environment where the cooling system is located are obtained, and the target cooling water temperature of the cooling system is determined according to the environment state data and the target water supply scheme; according to the target production parameter set, the environment state data, the target water supply scheme and the target cooling water temperature, the target cooling water amount of the cooling system is determined; and the cooling system is controlled to cool the steel according to the target cooling water temperature and the target cooling water amount. The control precision of the cooling system is improved.

This invention provides a fuel cell system capable of suppressing freezing blockage of the cathode channel. [Solution] A fuel cell system comprising: a fuel cell; a gas supply system for supplying a reaction gas to the fuel cell; a cooling system for circulating cooling water through the fuel cell to cool it; an ambient temperature sensor for measuring ambient temperature; a cooling water temperature sensor for measuring the temperature of the cooling water; and a control unit, wherein when the control unit receives a request to stop power generation of the fuel cell, if the value of the ambient temperature sensor is lower than a first threshold T1, it drives the cooling system to perform a cooling process to cool the fuel cell until the value of the temperature sensor is higher than 0°C and less than or equal to a threshold B; and after the cooling process is completed, the control unit executes a shutdown of the fuel cell system.

The utility model discloses a high energy frequency laser water cooling dew condensation prevention device, including cooling water tank, the inside water temperature adjusting assembly and first water temperature sensor are provided with in cooling water tank, the inside laser is provided with laser crystal, laser crystal water cooler and temperature sensor in laser, and temperature sensor is installed in the vicinity of laser crystal water cooler, bypass loop is connected with cooling water tank and main circulation loop respectively, and main circulation loop is linked together with laser crystal water cooler, and bypass loop can be switched between first passageway state (bypass loop is not linked together with main circulation loop, and the cooling water in cooling water tank only circulates and flows through bypass loop) and second passageway state (bypass loop is linked together with main circulation loop, and the circulation passageway from cooling water tank to laser crystal water cooler is formed) through valve switching. The cooling water temperature that enters laser is highly matched with environment temperature and is regulated and controlled, and the dew condensation phenomenon caused by temperature difference in the starting stage of laser crystal is fundamentally eliminated.

The application relates to the technical field of cooling and waste heat recycling, and particularly discloses a cascade efficient heat recycling condensing system, which comprises a cascade cooling system and a heat recycling system. The cascade cooling system comprises a cascade condenser, a low-temperature cooling tower and a high-temperature cooling tower. The cascade condenser comprises a shell and a high-temperature water cavity and a low-temperature water cavity arranged in the shell. The high-temperature water cavity and the high-temperature cooling tower are connected in series through pipelines to form a high-temperature cooling loop, and the low-temperature water cavity and the low-temperature cooling tower are connected in series through pipelines to form a low-temperature cooling loop. The heat recycling system comprises a low-temperature heat exchanger connected in series in the low-temperature cooling loop and a high-temperature heat exchanger connected in series in the high-temperature condenser. The water outlet end of the heat absorption pipeline of the low-temperature heat exchanger is connected with the water inlet end of the heat absorption pipeline of the high-temperature heat exchanger through a temperature rising pipeline. The patent aims to solve the problem that the cooling water for wine production in the existing wine factory is cooled completely through a cooling tower, and it is difficult to cool the cooling water to the required temperature in summer high-temperature climate.

The invention relates to the field of control, and discloses a gas turbine TCA cooling water temperature accurate regulation and control method, which comprises the steps of carrying out multi-scale analysis on a gas turbine TCA system temperature time sequence, generating an eigenmode component set, constructing a multi-scale entropy impedance model of temperature dynamic characteristics according to the eigenmode component set, accurately describing the temperature dynamic characteristics, and calculating the temperature of the gas turbine TCA system. The model is combined with system control parameters, a temperature dynamic response relation is established, a multi-step prospective temperature prediction sequence is generated, and the future temperature change trend can be mastered in advance. And carrying out system impedance matching analysis based on the sequence to obtain an impedance matching analysis result, designing a variable impedance adaptive prediction strategy according to the analysis result, dynamically adjusting the system impedance characteristic, and generating a variable impedance prediction instruction set adaptive to the current working condition. According to the invention, through multi-scale analysis and prospective prediction, accurate prediction of the cooling water temperature of the gas turbine TCA is realized.

A cooling system for an internal combustion engine is equipped with an air conditioner having a heat exchanger, a first passage connected to the heat exchanger and supplies cooling water of the engine to the heat exchanger, a second passage connected to a cooling apparatus for oil which fills a speed change mechanism connected to the engine or for oil which fills the engine and which supplies the cooling water to the cooling apparatus, a flow control valve configured to control the flow rate of the cooling water to the first passage and the second passage, and a controller configured to control the engine and the flow control valve. When the temperature of the oil is higher than the temperature of the cooling water, the controller performs a first control which controls the flow control valve to a position in which the first passage and the second passage are open.

The application discloses a kind of ship air compressor cooling water temperature control and automatic degassing system and method thereof, including central fresh water cooler, cooling water expansion tank, first air compressor, second air compressor, self-acting temperature control valve and cooling water degassing cylinder, the water inlet of central fresh water cooler is communicated with cooling water expansion tank by expansion tank drain pipe, the water inlet of first air compressor and second air compressor is communicated with the water outlet of self-acting temperature control valve by cooling water inlet pipe, the water outlet of central fresh water cooler is communicated with the first water inlet of self-acting temperature control valve, the water outlet of first air compressor and second air compressor is respectively communicated with the water inlet of cooling water degassing cylinder by cooling water outlet pipe, the first water outlet of cooling water degassing cylinder is communicated with the second water inlet of self-acting temperature control valve by first cooling water circulation pipe.The application has the advantages of preventing condensate from being precipitated due to excessive cooling, entering lubricating oil to cause air compressor lubricating oil emulsification, and automatically removing gas in cooling system.

This utility model provides a water-cooling device for large-volume concrete, relating to the field of water-cooling technology for large-volume concrete. The device includes a cooling water unit connected to a first port of a four-way reversing ball valve; a second port of the four-way reversing ball valve connected to a first water reservoir, a fourth port connected to a second water reservoir, and a third port serving as a drain outlet; the first water reservoir is connected to one end of a cooling water pipe, and the second water reservoir is connected to the other end of the cooling water pipe; temperature sensors are installed at both ends of the cooling water pipe. Furthermore, when the temperature difference between the two temperature sensors exceeds a preset value, the four-way reversing ball valve reverses its direction. This device, by accurately detecting the actual cooling water temperature and coordinating with the four-way reversing ball valve to adjust the cooling water reversal, helps to achieve uniform cooling of different parts and increases the cooling rate of the concrete.

A compressed air refrigeration dryer for dehumidifying compressed air by means of a refrigerant circuit with carbon dioxide as the refrigerant, comprising at least one compressor (1), a gas cooler (3), at least one evaporator (2) configured to dehumidify compressed air passed on its secondary side at its cold surface, a refrigerant receiver (5.1, 11), an expansion valve (6) or an ejector, and a heat exchanger (8, 18) for heating the dried compressed air, which is connected downstream of the evaporator (2) at its air-side outlet, characterized in that the compressed air refrigeration dryer further comprises a control unit, at least one frequency converter connected upstream of each electrical power input of the at least one compressor (1), and a temperature sensor at a cooling water inlet of the gas cooler (3) for detecting a cooling water temperature.a temperature sensor for detecting a compressed air temperature at a compressed air inlet provided for introducing compressed air to be dehumidified into the compressed air refrigeration dryer, at least one pressure dew point sensor for detecting air humidity and a volume flow sensor for detecting a compressed air volume flow at the compressed air inlet, and at least one pressure sensor for detecting the refrigerant pressure at the compressor inlets, wherein the control unit is connected to the at least one compressor (1), the at least one frequency converter, the temperature sensors, the at least one pressure dew point sensor, the volume flow sensor and the at least one pressure sensor and is configured in such a way as tothat it can continuously read and store measured values ​​acquired by the sensors and that it can regulate the cooling capacity generated by the refrigerant circuit by controlling the at least one compressor (1) and / or the at least one frequency converter in such a way that dehumidified compressed air flowing out of the compressed air outlet of the refrigerated dryer constantly has a predetermined pressure dew point during operation of the compressed air refrigerated dryer.