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1561 results about "Inlet temperature" patented technology

Inlet temperature. The temperature signal taken in the engine inlet to measure air density and sent to the fuel control unit as a fuel-scheduling parameter.

High effectiveness cooled turbine vane or blade

A robust multiple-walled, multi-pass, high cooling effectiveness cooled turbine vane or blade designed for ease of manufacturability, minimizes cooling flows on highly loaded turbine rotors. The vane or blade design allows the turbine inlet temperature to increase over current technology levels while simultaneously reducing turbine cooling to low levels. A multi-wall cooling system is described, which meets the inherent conflict to maximize the flow area of the cooling passages while retaining the required section thickness to meet the structural requirements. Independent cooling circuits for the vane or blade's pressure and suction surfaces allow the cooling of the airfoil surfaces to be tailored to specific heat load distributions (that is, the pressure surface circuit is an independent forward flowing serpentine while the suction surface is an independent rearward flowing serpentine). The cooling air for the independent circuits is supplied through separate passages at the base of the vane or blade. The cooling air follows intricate passages to feed the serpentine thin outer wall passages, which incorporate pin fins, turbulators, etc. These passages, while satisfying the aero/thermal/stress requirements, are of a manufacturing configuration that may be cast with single crystal materials using conventional casting techniques.
Owner:HONEYWELL INT INC

Double-inlet double-outlet steel ball coal mill straight blowing type milling system optimized control method

The invention discloses an optimum dual-inlet and dual-outlet steel ball coal grinding machine direct-blow type powder-preparation control method. The method obtains the material position of the coal grinding machine after carrying out soft-measurement processing by collecting the noise material position of the coal grinding machine, the material position of pressure difference, the current of the coal grinding machine, one-time air quantity, one-time opening of the hot wind door and the cold wind door of an inlet, inlet temperature and outlet temperature; the control comprises material position control, air quantity capacity control, bypass air quantity control and the temperature control of the inlet and the outlet; the material position is optimized and the best material position of the coal grinding machine is searched online so as to ensure the combustion safety of the boiler and coal powder supply quantity when the load of the boiler is adjusted. The boiler combustion is optimized: according to the boiler technology, the load and the running working conditions, the powder supply quantity and the ventilation quantity of each coal grinding machine are optimized and the combustion efficiency of the boiler is improved. Malfunction diagnosis, running evaluation and analysis are carried out to the system and reasonable suggestions are provided so as to ensure the system to run continuously, stably, safely and economically; the optimum dual-inlet and dual-outlet steel ball coal grinding machine direct-blow type powder-preparation control method is widely applied to the dual-inlet and dual-outlet steel ball coal grinding machine direct-blow type powder-preparation system or industrial similar systems in other industries.
Owner:西安蓝海机械仪表成套有限责任公司

Method for controlling machine room air conditioner based on variable frequency compressor

The invention relates to a method for controlling a machine room air conditioner based on a variable frequency compressor. The method comprises the following steps of: 1, initializing the machine room air conditioner, and returning an electronic expansion valve to zero; 2, starting an evaporator, and regulating the air velocity of a fan of the evaporator according to air suction pressure Ps; 3, starting the variable frequency compressor, and regulating the frequency H of the variable frequency compressor according to the indoor temperature T0 and the preset temperature TA; 4, starting a condenser in time T2 after the variable frequency compressor is started, and controlling the air velocity of a fan of the condenser according to exhaust pressure PD and the air inlet temperature TD; and 5, controlling the opening Pm of the electronic expansion valve, and performing corresponding compensation on the opening Pm of the electronic expansion valve according to the frequency of the variable frequency compressor. By adopting the method for controlling the machine room air conditioner based on the variable frequency compressor, the temperature is controlled more stably and the fluctuation is low; and the opening of the expansion valve is compensated through the variable frequency compressor, so that the superheat degree is more stable and close to the expected target value.
Owner:深圳市深蓝新能源电气有限公司

Method for preparing butadiene with butylene oxo-dehydrogenation of axially-located bed

The invention relates to a method of preparing butadience with a butylene oxydehydrogenation device in a fixed bed, which belongs to the chemical technical field. The butylene, air and water vapor give an oxydehydrogenation reaction in an axial fixed bed reactor and generate the butadience. The axial fixed bed reactor has two segments. Process equipment consists of a first segment of axial fixed bed reactor, an inter -segment heat exchanger, a second segment of axial fixed bed reactor, a waste heat boiler and a back heat exchanger in turn. The reactor is filled with iron-based catalyst. The ingredient of the water vapor of the first segment of reactor acts with the first segment via the inter-segment heat exchanger to generate gas in addition to exchanging heat and raising temperature and then is mixed with the ingredient butylene and the air of the first segment to achieve the inlet temperature of the first segment of reactor. The ingredient of the first segment enters to the first segment of reactor to react. After heat exchange and temperature reduction through the inter-segment heat exchanger, the gas generated in the first segment is mixed with the feed butylene of the second segment and the air to achieve the inlet temperature of the second segment of reactor and reacts in the second segment of reactor. The invention has the advantages of high yield coefficient, high selectivity and steam of low unit consumption. Heat energy can be used reasonably.
Owner:ZIBO QIXIANG TENGDA CHEM

Method for controlling hot continuous rolling finish rolling process

The invention provides a method for controlling a hot continuous rolling finish rolling process, which belongs to the technical field of automatic steel rolling control. The method is that after the parallel data interface (PDI) data is obtained, according to the technological requirements which are established in a rolling plan, the thickness of a hot continuous rolling finish rolling target outlet and the target temperature of the finish rolling outlet are determined; the practical temperature of a hot continuous rolling finish rolling inlet is obtained; the load distribution of a rack is determined; rolling parameters including the roller linear velocity, inlet temperature, rolling force, roller gap position and motor power parameter of various racks are calculated; the rolling parameters are subjected to limit checking and are judged whether to meet the operation conditions of equipment or not, if yes, the rolling parameters are sent to a control system in a command mode, and the hot continuous rolling finish rolling process is controlled; and if not, calculation is carried out again. Through calculating the rolling force, the prediction precision and the thickness precision are improved, the service cycle of a roller is accurately predicted, based on a roller thermal expansion model, the rolling process has different rolling intervals, and good thickness controlling precision is obtained.
Owner:NORTHEASTERN UNIV

Thermal management system of water-cooling proton exchange membrane fuel cell and control method of thermal management system

The invention provides a simple and effective thermal management system of a water-cooling proton exchange membrane fuel cell and a control method of the thermal management system. The thermal management system mainly comprises an electric pile, a water tank provided with a heating device, a cooling water circulating pump, a radiator, a cooling water pile inlet temperature sensor, a cooling water pile outlet temperature sensor, a cooling water pile inlet pressure sensor and a controller of the thermal management system. The control method following pressure change is provided to overcome the defects of lag, great overshooting, system coupling and the like caused by temperature change tracking in the traditional control strategy. The radiator is mainly used for controlling the cooling water inlet temperature of the pile and mainly controls the rotating speed of a radiator fan according to the cooling water inlet temperature of the pile of the fuel cell; and the cooling water circulating pump is mainly used for controlling the cooling water flow in the whole thermal management system and mainly controls the rotating speed of the circulating pump according to the cooling water inlet pressure of the pile of the fuel cell.
Owner:SOUTHWEST JIAOTONG UNIV

Refrigerant flow control method for multi-connected air-conditioning system during heating

The invention discloses a refrigerant flow control method for a multi-connected air-conditioning system during heating. The refrigerant flow control method controls the refrigerant flow in the system by adjusting the opening of an electronic expansion valve in a switched-off indoor unit, and comprises the following steps: a. enabling the air-conditioning system to enter a heating operational mode; b. switching off or switching on the valve according to the condensing pressure and evaporating pressure of the system; c. switching on the valve according to the exhaust temperature of a compressor; and d. switching off or switching on the valve according to the condensing saturation temperature converted from the condensing pressure or according to the coil temperature of the switched-on indoor unit, the coil temperature of the switched-off indoor unit, the outlet temperature of a heat exchanger in the switched-off indoor unit and the inlet temperature of the heat exchanger in the switched-off indoor unit. The dynamic equilibrium control strategy for a refrigerant provided by the invention can automatically adjust the opening of the electronic expansion valve in the switched-off indoorunit according to the system operation conditions, thereby avoiding energy waste and reduced heating effect caused by overlarge deviation of the opening of the expansion valve, and improving the heating performance of the air-conditioning system.
Owner:青岛海信网络能源股份有限公司

Method for detecting lack of refrigerant in air conditioner, and air conditioner

The invention discloses a method for detecting the lack of a refrigerant in an air conditioner, and the air conditioner. The air conditioner comprises a compressor, a heat exchange, a throttling piece, a wind wheel and a controller, wherein an inlet refrigerant temperature sensor for detecting the refrigerant inlet temperature of the heat exchanger is arranged at an inlet of the heat exchanger; an outlet refrigerant temperature sensor for detecting the refrigerant outlet temperature of the heat exchanger is arranged at the outlet of the heat exchanger; when the absolute value of the difference between the refrigerant inlet temperature and the refrigerant outlet temperature is greater than or equal to a set value, the controller displays the lack of the refrigerant in the air conditioner. According to the invention, through detection by the relevant temperature sensors, the lack of the refrigerant in the air conditioner can be displayed timely and accurately, and the corresponding alarm information about the lack of the refrigerant can be given, therefore, the problem that the conventional household air conditioner cannot automatically detect the leakage or lack of the refrigerant is solved; and further, the method and the air conditioner have the characteristics of economy, practicability, and convenience and accuracy in operation.
Owner:MIDEA GRP CO LTD
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