39results about How to "Reduce supercooling" patented technology

A method for operating a waste heat steam generator including an evaporator, an economizer having a number of economizer heating surfaces, and a bypass line connected on the flow medium side in parallel with a number of economizer heating surfaces is provided. The method makes possible higher operational safety and reliability in the control of the waste heat steam generator. For this purpose, a parameter that is characteristic of the thermal energy fed to the waste heat steam generator is used to control or regulate the flow rate of the by-pass line.

The invention discloses pipe powder for nodular cast iron. The formula of the pipe powder comprises the following components in percentage by weight: 62-70% of Si, 3-10% of Ba, 1-2% of Ca, 0.8-1.8% of Al, 0.5-1.5% of Fe3O4, the balance of Fe and inevitable microelements. According to the pipe powder for the nodular cast iron disclosed by the invention, the overall performance of the nodular cast iron can be improved, and the inoculation efficiency is improved.

A method for operating a waste heat steam generator including an evaporator, an economizer having a number of economizer heating surfaces, and a bypass line connected on the flow medium side in parallel with a number of economizer heating surfaces is provided. The method makes possible higher operational safety and reliability in the control of the waste heat steam generator. For this purpose, a parameter that is characteristic of the thermal energy fed to the waste heat steam generator is used to control or regulate the flow rate of the by-pass line.

A fluid sample vessel includes inlet and vent tube fittings formed at one end of a container with an opposite open end closed by a needle septum. A support cap is removably engaged to the container to support the container and protect terminal ends of inlet and vent tubular branches coupled to the fittings. The support cap includes a pair of opposite legs with outwardly directed tabs for mounting within a centrifuge while supporting the cryopreservation container.

The invention discloses a supercooling maintenance device for pulse thermoelectric refrigeration capable of heat recovery, which includes a thermoelectric refrigeration mechanism, a rotating mechanism, a thermoelectric power generation mechanism and an installation shell. It is installed on the rotating mechanism, and the cold medium conduction block is installed on the side of the installation shell. When the thermoelectric refrigeration unit rotates to communicate with the external pulse current on the cold medium conduction block, there will be transient supercooling on the basis of normal refrigeration, and then the thermoelectric The refrigeration unit will be accompanied by retaliatory thermal feedback, and the rotating mechanism will move the thermoelectric refrigeration unit that has retaliatory thermal feedback to the heat conduction medium block to connect with the electric power generation mechanism, and at the same time, the next group of thermoelectric refrigeration units will follow the external pulse on the cold medium conduction block The current connection continues the transient supercooling based on the normal cooling of the thermoelectric refrigeration unit, and such a cycle realizes the enhancement of the refrigeration capacity of the thermoelectric refrigeration, continuous high-efficiency refrigeration and the recovery and utilization of the heat generated by the thermoelectric refrigeration.

A condenser includes a shell with a vapor refrigerant inlet, a first tube bundle, and a liquid refrigerant outlet. A second tube bundle is positioned in the subcooler section. The subcooler component has a central channel and at least two outer channels and is fitted to the housing.

The compressor includes the compressor main body compressing suction gas sucked from a suction flow passage, and a discharge flow passage supplying the gas discharged from a discharge port of the compressor main body to a gas supply destination side. The discharge flow passage has a temperature detector detecting a discharged gas temperature, a heat exchanger cooling the discharged gas, and a cooling fan flowing the cooling air against the heat exchanger. A computing unit is provided to control the revolution number of the cooling fan so that the discharged gas becomes a predetermined temperature defined in advance. By the constitution, cooling is properly performed depending on the calorie of the gas discharged from the compressor main body, so as to reduce the required motive power used for the cooling.

The invention proposes a whole network balance adjustment method based on load prediction and room temperature feedback correction. Most of the traditional heat supply adjustments are adjustments to heat sources or heat stations. This extensive adjustment method often causes large fluctuations in room temperature and even wastes energy. The control method proposed in this paper, on the basis of considering the adjustment of heat sources and heat stations, adds the adjustment research on the balance of the whole network. The goal of network-wide balance adjustment is to achieve the matching of supply and demand of the primary and secondary networks and the stability of the pipe network by adjusting the parameters of the heating system. In order to achieve this goal, it is necessary to determine the control cycle, adjust the time node, and perform periodic dynamic prediction of heating parameters, and center on the user's room temperature target value, and use the room temperature to make feedback corrections to the predicted water supply temperature, and finally form a model based on load forecasting and room temperature. The whole network balance adjustment method based on feedback correction. After the method is adopted, the fluctuation of the room temperature is relatively gentle, the phenomenon of overheating and overcooling is obviously reduced, and the effect of energy saving is remarkable.

The invention discloses pipe die powder for centrifugally casting a nodular cast iron pipe and a preparation process thereof. The pipe die powder comprises the following components in percent by mass: 60-65 percent of Si, 1.5-2.0 percent of Ca, 2.0-3.0 percent of Ba, 1.4-1.6 percent of Mn, 1.0-1.5 percent of Mg, 1.0-2.0 percent of Zr, 0.7-1.5 percent of Al and the balance of Fe; and the granularities of pipe die powder comprise less than 1.5 percent of 80 mu, 25-30 percent of 100-120 mu, 40-50 percent of 140-180 mu, 25-30 percent of 200-300 mu and less than 2.5 percent of more than 300 mu. The preparation process comprises the following steps of: preparing, melting, pouring, cooling, crushing, milling, proportioning granularities and packaging in vacuum. The pipe die powder has the advantages of uniform components, consistent melting points and reasonable granulometric class, and is beneficial to the prolonging of the service life of a pipe die of the nodular cast iron pipe, the reduction of a series of casting defects of cockles, poor nodulizing, surface cracks and the like of the nodular cast iron pipe, the improvement of the quality of the nodular cast iron pipe and the yield, and the lowering of the production cost.

The invention discloses a comfort control method of an air conditioner. The method comprises the following steps of: acquiring a face temperature of a human body through an infrared sensor and determining the temperature interval range of the face temperature; and correspondingly performing refrigerating or heating comfort control when the face temperature meets the predetermined temperature interval range and the wind direction and the wind shift of the air conditioner meet the predetermined condition. The invention also discloses the air conditioner. According to the invention, comfort control of temperature and wind speed can be performed according to the face temperature of the human body detected by the infrared sensor, so that the user experience is improved.

The invention discloses a low-temperature phase change cold storage material suitable for medical cold chain transportation and a preparation method thereof, and belongs to the technical field of phase change energy storage materials. The material comprises the following raw materials in percentage by mass: 11%-23% of sodium formate, 5%-8% of ammonium chloride, 60%-75% of ultrapure water, 1%-2% of trimethylolpropane, 0.5%-2.5% of sodium polyacrylate and 0.5%-1.5% of crystalline flake graphite. The invention also provides a preparation method of the low-temperature phase change cold storage material, and the obtained low-temperature phase change cold storage material has the phase change temperature of-28.5 to-27.5 DEG C, the phase change latent heat of 280KJ / Kg, small supercooling degree, large heat conductivity coefficient, good stability, long service life and no phase separation phenomenon, and can be widely used for storage and transportation of low-temperature frozen foods and medical products.

The invention discloses a preparation method of a nucleating agent for nodular cast iron. The method comprises the step that 66%-72% of Si, 3%-10% of Ba, 1%-2% of Ca, 0.8%-1.8% of Al, 1.5%-2% of Ce, 0-1% of S and the balance Fe and inevitable micro elements are mixed, smelted, stirred, cooled and smashed; and then a mixture is mixed with Fe3O4 power to be pressed into a block to be smashed again. The invention further discloses application of the nucleating agent for nodular cast iron. By the adoption of the nucleating agent for the nodular cast iron, the comprehensive performance of the nodular cast iron can be improved, and the nucleating efficiency is improved.

The invention discloses a method for improving the temperature monitoring of fruit and vegetable water precooling. According to the fruit and vegetable type and the pre-cooling water temperature, the fruit and vegetable pre-cooling and cooling model is matched, and the time required for fruit and vegetable pre-cooling to the end temperature is obtained from the initial temperature of the fruit and vegetable. Pre-cooling water temperature, when the difference between the water temperature and the previous water temperature is greater than X, re-match the fruit and vegetable pre-cooling cooling model according to the pre-cooling water temperature, and re-obtain the time required for fruit and vegetable pre-cooling to the termination temperature from the predicted pulp temperature, until the time required for pre-cooling Stop precooling at zero. Compared with the existing technology, the technical solution of the present invention has better adaptability to different fruits and vegetables and different initial temperatures. When the pre-cooling water temperature changes, the pre-cooling time is corrected in time, and the strict requirements for water temperature stability are reduced. Real-time monitoring of the temperature of fruits and vegetables is not required. Reduce the phenomenon of insufficient and overcooling of fruits and vegetables caused by water temperature fluctuations and inaccurate temperature detection, and improve the effect of fruit and vegetable precooling.

The invention discloses a flux-cored wire for low alloy structure steel and a preparing method of the flux-cored wire. The flux-cored wire is composed of a flux core and stainless steel outer skin wrapping the outer side of the flux core; and raw materials of the flux core comprise chromium powder, silica powder, manganese powder, titanium powder, titanium boride powder, silicon nitride powder, magnesium aluminum alloy powder, titanium dioxide powder, iron oxide powder, indium oxide powder, cerium oxide powder, praseodymium oxide powder, carbonate, ferro-molybdenum powder, ferro vanadium powder, ferrozirconium powder and reduced iron powder. According to the flux-cored wire for the low alloy structure steel and the preparing method of the flux-cored wire, the flux-cored wire has the performances that splashing is small, molding is good, deslagging is easy, deposited metal texture is compact, air holes and cracks are avoided, bonding with parent metal is good, and performance is stable; deposited metal has the good hardness, low temperature toughness, abrasion resistance, corrosion resistance, creep resistance and the like, and the good economical benefits are achieved.