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Cold storage manufacturing industry market in China       Cold storage is one of the important infrastructures in the cold chain logistics industry. In recent years, the quantity of cold storage in China has increased, but compared with the huge market demand is still insufficient. According to data from China Internet of Things, the demand for cold storage in the first half of 2018 exceeded 1.5 million square meters, up 14.9% year on year. At present, domestic cold storage demand is mainly concentrated in Beijing, Shanghai, Guangzhou and Shenzhen, as well as Fujian, Tianjin, Zhejiang, Jiangsu, Shandong, Chongqing, and Henan. (The darker the color, the greater the demand)        Cold storage, as an important tool in cold chain logistics, is related to a number of market segments. Among them, the third-party logistics enterprises have the largest demand for multi-cold storage, while the food processing enterprises have the smallest demand.        The demand for cold storage is growing day by day, and the concentrated area of the cold storage leasing market is close to the demand concentrated area. According to incomplete statistics, in the first half of 2018, the rentable area of cold storage in China exceeded 3.3 million square meters, with a year-on-year growth of 12.1%. The range of rental cold storage is mainly concentrated in Beijing, Shanghai, Guangzhou and Shenzhen, as well as Hubei, Shandong, Jiangsu, Liaoning, Shandong, and Henan. (The darker the color, the greater the demand) Through the comparison of cold storage demand heat map and cold storage rental heat map, it can be seen that the domestic cold storage supply and demand pattern has the following characteristics:        The supply and demand of cities such as Beijing, Shanghai and Guangzhou are flourishing. Fujian, Zhejiang, Guizhou, and Henan have strong demand and insufficient cold storage. These are mainly second-tier provincial capitals, which will face a new round of rapid economic development and consumption upgrading, and the cold storage market will further expand in the future.       Hubei, Hunan, Shandong and others are relatively surplus cold storage. First of all, in the cold storage business, to find the right positioning to achieve differentiation. Secondly, the cold storage surplus is not only because of less demand, but also may be because the cold storage itself can not meet the demand. The materials and analysis are from the "2018-2023 China Cold Storage Market Prospects and Investment Opportunities Research Report" released by China Institute of Commerce and Industry.

Principle of refrigeration equipment Freezing: the operation of using the low temperature source generated by refrigeration to cool the product from room temperature and then freeze it.Refrigeration: The operation of obtaining a low temperature source by means of a cooling effect resulting from a change in the physical state of the refrigerant.Types of refrigeration equipment: cold source production (refrigeration), material freezing, cooling. Refrigeration mode: piston type, screw type, centrifugal refrigeration compressor unit, absorption refrigeration unit, steam injection refrigeration unit and liquid nitrogen.Freezing mode: air cooled, impregnated and refrigerant through metal pipe, wall and material contact heat transfer and cooling device.Application:1. Freezing, refrigerating and freezing transportation of food.2. Cooling, cold storage, air-conditioned storage and cooling transportation of agricultural products and food.3. Food processing, such as freezing drying, freezing concentration and material cooling, etc.4. Air conditioning in food processing plants. Principle of refrigeration cycleMain devices: refrigeration compressor, condenser, expansion valve, evaporator. Refrigeration cycle principle: refrigerant in the low temperature low pressure liquid state when heat boiling evaporation become after low temperature low pressure steam, evaporated into gas refrigerants in the compressor, become the high temperature and high pressure gas, after the high temperature and high pressure condensate as high pressure liquid, high pressure liquid after expansion valve into low pressure low temperature, heat evaporation constitutes the refrigeration cycle of refrigerating machine again. Basic concepts and principlesRefrigeration capacity: under a certain operating conditions (i.e., a certain refrigerant evaporation temperature, condensation temperature, supercooling temperature), unit time refrigerant from the refrigerant removed heat. Also called refrigerant capacity. Under the same conditions, the refrigeration capacity of the same refrigerant is related to the size, speed and efficiency of the compressor.Direct refrigeration: in the refrigeration cycle, if the refrigerant-absorbing evaporator directly exchanges heat with the cooled object or the surrounding environment of the cooled object. It is generally used in single refrigerating equipment, such as ice cream freezing machine, small refrigerators and household refrigerators.Refrigerant: A working substance in a refrigeration unit that circulates continuously for refrigeration. The steam compression refrigeration device transfers heat through the change of refrigerant state. Refrigerant is an indispensable substance to realize artificial refrigeration.Indirect refrigeration: the use of cheap material as a medium to realize the heat exchange between the refrigeration unit and the cold consuming place or machine.Refrigerant: the refrigerant in the refrigeration device into the evaporator generated by the cold transfer to the cooled object, absorbed heat to the refrigeration device and then transferred to the refrigerant, its own re-cooling cycle.Principle of indirect evaporative refrigerationIndirect refrigeration principle: the refrigerant in the evaporator from the refrigerant to absorb cold, through the salt pump into the cold storage, and the cooling object or the medium of the workplace heat exchange absorb heat, back to the evaporator, the absorbed heat transfer to the refrigerant, its own cooling cycle. Commonly used refrigerant carrierCommonly used coolant: air, water, brine and organic water solution.Selection criteria: low freezing point, large specific heat capacity, no metal corrosion, chemical stability, low price and easy access to other factors, as a food industry for the coolant, often must have tasteless, odorless, colorless and non-toxic conditions.Although air as a load coolant has more advantages, only because of its small specific heat capacity, and as a gas to use its convective heat transfer effect is poor, so in food refrigeration or frozen processing, is used in the form of direct contact with food.Water is larger than heat, but its freezing point is high, so it can only be used as a refrigerant for making a cooling capacity above 0℃. If you want to make the coolant below 0℃, use brine or organic solution as coolant.The aqueous solution of sodium chloride, calcium chloride and magnesium chloride is usually called frozen brine. The most widely used frozen brine in the food industry is sodium chloride aqueous solution. Among the organic solution coolers, the two most representative coolers are the aqueous solution of ethylene glycol and propylene glycol.（Not the original）

What are the main categories of HZSS's products?                HZSS's main products: coaxial heat exchanger, shell & coil heat exchanger, shell & tube heat exchanger, high efficiency compact micro channel heat exchanger, plate fin micro channel heat exchanger, high efficiency mixed heat exchanger, micro reactor, micro channel continuous flow reaction device, and others high quality energy saving heat exchange products, services and system solutions.        The application scenarios of HZSS's heat exchanger mainly include the following categories:HVAC: water/ground source heat pump, (CO₂) heat pump water heater, industrial water cooler, low temperature heating equipment;Cold/cold chain: ice slurry;Food/household appliances: water purifier, ice maker, washing machine, dishwasher, milk cooling equipment;Titanium alloy: Marine air conditioner, pool heat pump, mariculture;Ships/transportation: Marine air conditioning, battery cooling system;Energy/power generation: SCO₂ power generation, nuclear power, hydrogen station, gas turbine;Oil & gas exploitation: LNG, hydrogen liquefied;Aerospace: aerospace, electronic equipment cooling system, environmental control package;Chemical/pharmaceutical: micro-reactor, micro-mixer, continuous reaction unit, tubular reactor.

What is working condition of “Heat exchanger for hydrogen fuel cell vehicle-mounted hydrogen supply system”？      The heat exchanger of the hydrogen supply system uses a mixture of ethylene glycol and water to exchange heat for the decompressed hydrogen from the hydrogen storage bottle (the lowest temperature of hydrogen affected by the environment is -40°C).      The advantages of microchannel heat exchangers used in vehicle-mounted hydrogen supply systems are small size, light weight, safety and reliability, and resistance to hydrogen corrosion and hydrogen embrittlement.

What is the current status of the domestic microchemical industry?       The medical and chemical industries are related to the development of the entire country and the quality of people’s livelihood, and are important pillar industries that measure a country’s national strength. Different from other industries, the chemical production industry faces a more severe safety situation. In particular, once many hazardous chemical accidents occur, there will often be a large number of casualties at the same time, causing extremely bad social effects. In addition to frequent chemical accidents, problems such as high energy consumption, high pollution, waste of resources, and low efficiency also restrict the development of the industry. On the one hand, it is related to human operation factors, and on the other hand, it is also related to backward equipment technology. In order to change this state, in recent years, a new technology-Micro Chemical technology, that can greatly shorten the chemical reaction time and better solve many chemical problems such as strong corrosion, pollution, high energy consumption, flammability and explosion, etc.       Compared with traditional chemical technology, micro chemical technology has great future prospects and application value in fine chemical industry. The core of the whole technology is the microchannel reactor, which, with the characteristics of "three transmissions and one reverse", fundamentally solves the problems of strong corrosion, high pollution, high energy consumption, and flammability and explosion.       At present, my country's fine chemical manufacturers already have a considerable scale, especially the various types of fine chemicals among them are numerous. Although the scale is huge, the industry foundation is very weak. In particular, the level of safety management lags far behind other developed countries. Due to the lack of industrial technology and the imperfect level of legal and safety supervision and evaluation, the development process and safety level of the entire chemical industry are not at the same level.      The “Guidelines for the Safety Risk Assessment of Fine Chemical Reactions” issued by the State Administration of Work Safety clearly pointed out: For the reaction process, the process of risk level 4 and 5 or higher needs to be optimized to reduce the risk, such as micro-reaction, continuous Complete the reaction and so on. In particular, the advantages brought by micro-reaction technology in the field of fine chemicals can greatly improve the essential safety of the refinement process.      Based on micro-reaction technology, HZSS focuses on chemical process technology, focusing on the development of continuous flow micro-reactors and large-scale chemical equipment; researches on automation and precision control technology for the entire chemical production process, and develops digital, information, and intelligent chemical production processes; HZSS serves the R&D and production projects of pharmaceutical, dye, pesticide, environmental protection, nano-industry, petrochemical and other enterprises at home and abroad, helping customers develop and improve processes to achieve safer, more environmentally friendly and more efficient industrial production.

What are the service advantages of choosing HZSS's Microreactor?1. Large selection range:316L, duplex steel, Kazakhstan C276, TA10, Zr, silicon carbide and other different material options;2. Product diversification:Micro-channel mixer, micro-channel heat exchanger, micro-channel reactor, tubular reactor;3. Ultra high flexibility:Multi-strands can be fed and the temperature can be controlled in zones. At the same time, it can be used alone or in multiple groups in series;4. Standardized takeover size or can provide takeover customized service:Standard imperial or metric interface, can provide private customized services, to facilitate the connection with other equipment systems;5. Provide product customization services:Provide customers with special design and customized services to fully meet the various needs of customers;6. Easy to realize the transformation from laboratory to industrialization:The product has a high compact structure, no amplification effect, and is easy to realize industrialization.

What direction is the micro-reaction process applicable? The core of microchemical technology is the microchannel reactor. Compared with traditional chemical technology, the most important thing in micro-chemical technology is to research and develop reactors and rapid reaction process conditions suitable for micro-reaction systems.Applicable direction of micro-reaction process, Research shows that if a reaction process has the following characteristics, then micro-reactor technology will bring greater improvement.1. Fast liquide phase reaction2.Exothermic or endothermic reaction3. Reactions with low selectivity in the original processHZSS provides a series of microreactor products for customers to seamlessly connect from laboratory development to industrial production. (From laboratory to small test to pilot test to industrial production) HZSS microreactors' medel: Model Size Detention Annual flux SWR 156*130mm 10mL 24-144 Tons/year SW1 210*140mm 20mL 48-288 Tons/year SW2 359*230mm 120mL 240-1440 Tons/year SW3400*275mm300mL720-3840 Tons/yearSW4530*380mm560mL1440-7200 Tons/year

What is the classification of HZSS's micro-reaction equipment?Classification of micro-reaction equipment: micro-chaennel mixer, micro-channel heat exchanger, micro-reactor, micro-reaction experimental device. Micro channel mixer: Micro channel heat exchanger：                                   Plate etching,              plate stacking,              high temperature diffusion,    integrated moldingMicro reactor： Schematic diagram of micro reaction device Physical picture of micro reaction device

What is microreactor?Definition:      "Microreactor" originally referred to a small tubular reactor used for catalyst evaluation and kinetic research, with a size of about 10 mm.      Now it mainly refers to the three-dimensional structural elements used for chemical reactions manufactured by micro-processing technology or the highly integrated micro-reaction system including various functions such as heat exchange, mixing, separation, analysis and control, and usually contains an equivalent diameter of the order of magnitude. The fluid flow channels between micrometers and millimeters, chemical reactions occur in these channels, so microreactors are also called microchannel reactors.Features:      Using micro-channel/micro-structure precision processing technology, the characteristic size is within hundreds of microns, and the residence time is seconds/milliseconds;      Enhanced mass transfer: high efficiency, better selectivity;      Efficient heat exchange: high space-time efficiency, high production efficiency;      Continuously airtight, fast and controllable: Green chemical engineering, safer and more environmentally friendly, reducing the risk of hazardous chemicals;      Economical and reliable: low capital investment, low operating cost, low maintenance cost.Classification:      Liquid-liquid phase microreactor, gas-solid phase microreactor, gas-liquid phase microreactor, gas-solid-liquid microreactorThe reaction type of the microreactor can be selected:1. Violent reaction during the reaction2. Reactions with unstable reactants or products3. Rapid response to strict requirements for feeding and mixing4. Dangerous chemical reaction5. High temperature and high pressure reaction

What are the HZSS high-efficiency compact microchannel heat exchangers?      In 2011, Hangzhou Shenshi Energy Conservation Technology Co., Ltd. took the lead in the development and production of high-efficiency compact heat exchangers in the fields of aviation, aerospace, shipbuilding, nuclear, solar thermal power generation, petrochemical power generation, and hydrogen energy, etc.Products:Micro-channel heat exchanger for aerospace ring control cold pack,Air-antifreeze microchannel heat exchanger for aero-engine,Fuel-lubricating oil heat exchange titanium alloy high-efficiency micro-channel heat exchanger for aviation,(TA15) titanium alloy high-efficiency micro-channel heat exchanger for aviation,Titanium alloy helium-helium high-efficiency microchannel heat exchanger for aerospace,Air-refrigerant heat exchange micro-channel condenser for aerospace,Micro-channel cold plate for space satellite,Titanium alloy micro-channel cold plate for cooling of aerospace electronic components,Micro-channel cold plate for electronic components,Micro-channel cold plate (copper liquid cold plate) for electronic components and medical field,Microchannel vapor chamber for electronic components,Hydrogen-antifreeze heat exchange micro-channel heat exchanger for hydrogen energy hydrogenation machine (35MPa/70MPa),Steel/Stainless steel plate-fin heat exchanger for hydrogen liquefaction system and low temperature field,1300kW titanium alloy/iron-nickel alloy high temperature air and water/sea water plate-fin heat exchanger for marine gas turbine,Titanium alloy intercooler for yacht engine,FLNG natural gas compressor titanium alloy interstage cooler,Micro-channel heat exchanger/pre-cooler for SCO₂ power generation system,Molten salt-helium microchannel heat exchanger for nuclear power,PCHE for waste heat removal system,SCO₂-flue gas hybrid heat exchanger (H²Xs) for medium and heavy-duty trucks,High temperature heat exchanger for solid oxide fuel cell system (SOFC),......

Advantages of fully automatic laser welding process?       Laser welding uses high-energy laser pulses to locally heat the material in a small area. The energy of the laser radiation diffuses into the material through heat conduction, and the material is melted to form a specific molten pool to achieve the purpose of welding. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, stitch welding, sealing welding, etc., with high aspect ratio, small weld width, and small heat affected zone. Small deformation, fast welding speed, smooth and beautiful welding seam, no need to handle or simple processing after welding, high welding seam quality, no air holes, precise control, small focus spot, high positioning accuracy, easy to realize automation.       Laser welding has significant advantages that traditional welding methods cannot match: small heating range, narrow welding seam and heat-affected zone, excellent joint performance; small residual stress and welding distortion, high-precision welding can be achieved; high melting point, high thermal conductivity, Heat sensitive materials and non-metals are welded; the welding speed is fast, the productivity is high; and it is highly flexible.       The fluorine side head of HZSS's new shell and tube heat exchanger uses laser welding instead of the traditional head bolt gasket for forced sealing; the pressure is high, and there is no risk of leakage on the fluorine side. And the penetration depth is large; the penetration rate is high; the heat affected zone is small, and the cooling is extremely fast.

How PCHE works?Working principle:       Printed circuit heat exchanger (PCHE) is a kind of heat exchanger in which metal plates are processed by electrochemical etching process into heat exchange plates with a certain structure, and then stacked together by diffusion welding. A tiny channel is formed between the various plates, and the working fluid flows through the tiny channel formed between the two plates. There is a partition in the middle to separate the fluid and exchange heat through the plates.Advantages:(1) Compared with shell-and-tube heat exchangers with the same heat load, the volume and weight can be reduced by up to 85%;(2) The pressure can reach 600 bar;(3) Unit thermal efficiency exceeds 98%;(4) The range of extreme temperature capability ranges from low temperature to 900 ℃;(5) It can effectively handle fluids or large temperature difference conditions caused by rapid temperature changes;(6) In a single device, multiple media can be allowed to implement the heat exchange process;(7) Able to achieve a small temperature difference as low as 2 ℃;(8) A series of anti-corrosion material manufacturing equipment can be selected;(9) No gasket (no leakage), no brazing, no tube sheet, with higher equipment integrity.

What is HZSS PCHE？       PCHE, a new type of heat exchanger with high compactness, can perform heat transfer under severe conditions such as high temperature and high pressure. Using chemical etching technology, it can etch PCHE heat exchange unit channels on the order of micrometers to millimeters.       And it is with highly compact：5000m ²/m³；high heat transfer coefficient：3000-5000/（m ²·K）；small channel size：0.1-2mm；high pressure：30-250MPa；temperature resistance：-200℃-900℃；high reliability; Anti-corrosion；welding strength is equal to the strength of the base metal；no excess, no solder clogging；small size and long service life.       HZSS PCHE adopts vacuum diffusion bonding technology: in a vacuum environment, the weldment is closely attached and kept at a certain temperature and pressure for a period of time to make the atoms between the contact surfaces diffuse to form a connection.       Diffusion bonding features：1.The bonding strength can reach more than 95% of the strength of the bonding material matrix;2.No need to fill solder, so the temperature resistance and corrosion resistance of the weld depends on the material itself;3.There is no remelted as-cast structure in the joint, and the physical and chemical properties of raw materials are rarely changed, and the weld has no heat-affected zone;4.The bonded product has only microplastic deformation and small residual stress. It can be processed, reshaped and cleaned after bonding. It is an ideal bonding method for precision parts.       After repeated production inspections and tests, HZSS PCHE can be practically applied to supercritical CO₂ power generation systems, nuclear power, hydrogen energy, gas turbines, LNG offshore oil and gas platforms, aerospace, and cryogenic fields, etc.

What is the development situation of PCHE in domestic offshore oil and gas field?        The printed circuit board heat exchanger (PCHE) itself is a clean and environmentally friendly product with considerable energy-saving effects, and the economic benefits it can bring are even more impressive. It is estimated that by 2022, the demand for PCHEs is about 500 units, worth about 2.5 billion to 5 billion yuan. In the field of offshore engineering, PCHEs can greatly save the construction cost of offshore equipment, and can be applied to offshore platforms, floating storage and regasification units (FSRU), FLNG and other offshore equipment.        Compact and high-efficiency heat exchangers (PCHE for short) are widely used in floating liquefied natural gas production storage and unloading units (FLNG), floating storage regasification units (FSRU) and offshore oil and gas production platforms. They are used in the development of oil and gas resources in the South China Sea and the entire ocean Core equipment.At present, the equipment is monopolized by Heatric in the United Kingdom, resulting in extremely expensive equipment, with a single quotation as high as millions of dollars. Heatric has supplied a total of 2500 PCHEs worldwide. Due to the lack of my country's high-end deep-sea key technology and equipment development capabilities, it does not have the ability to localize PCHEs for offshore oil and gas fields, which has become an important factor restricting my country's deep-sea oil and gas resource development. The PCHE high-efficiency heat exchanger used in the offshore oil and gas field is a core key technology that has been "stucked" by foreign countries, posing a threat to my country's independent development of deep-sea oil and gas resources.         Hangzhou Shenshi Energy Conservation Technology Co., Ltd., according to the PCHE thermal design plan provided by CNOOC, produces compact and efficient micro-channel heat exchangers (PCHE) for the offshore oil and gas field, laying the technology for accelerating the localization of my country's independent core equipment basis.        The compact and high-efficiency micro-channel heat exchanger (PCHE) is used in the offshore oil and gas field. This product fills the domestic gap and has generally reached the international advanced level. It can be used in offshore oil and gas/LNG and related fields. This signifies that China can independently develop and produce efficient and reliable PCHE equipment for offshore oil and gas fields! The localization of the equipment is of great strategic significance and economic benefits for breaking the monopoly of foreign technology, improving the level of domestic equipment manufacturing, and ensuring national energy security.