What is a shell-and-tube condenser? Shell-and-tube condenser is the commonly used heat exchanger of Dechang water-cooled chiller. Shell-and-tube condenser consists of shell, tube sheet, heat transfer tube bundle, cooling water distribution part (water cover or water tank), cooling water and An enclosed water-cooled condenser consisting of a refrigerant inlet and outlet fittings.
Small condenser shell can use thick seamless steel pipe. The shell of the large condenser is to be welded with steel plates. The tube plates are welded to both ends of the shell to form a complete shell. A plurality of holes (tube holes) are processed on the tube plate. After the heat-transfer tube bundle penetrates into the tube holes, the both ends are connected with the tube plate by expansion or welding, and have good airtightness.
Shell and tube condensers are mainly used in water-cooled chillers. According to the spatial orientation (vertical or horizontal) of the shell and the heat transfer tube bundle, the shell and tube condenser can be divided into two types, vertical and horizontal. But no matter which type, the cooling water is to take the tube process (in the heat transfer tube bundle), the refrigerant is the shell process (inside the shell, the space outside the heat transfer tube bundle), that is, the high temperature and high pressure refrigerant vapor is The outer surface of the heat transfer tube cools, condenses, and converges to the shell. The reason why this process is arranged is that the average heat transfer coefficient between the cooling water and the tube bundle is generally higher than the average heat transfer coefficient of refrigerant vapor condensation, and the condensation requires a large heat exchange surface; furthermore, in order to make the high temperature, The pressure of the high-pressure refrigerant vapor is controlled within a certain range, and it also requires a large space.
In addition to the different spatial orientations, there is an important difference between the vertical and horizontal shell-tube condensers. This means that the horizontal shell-tube condensers have water caps at both ends, and the water caps and shells (or tube plates) often use the method. The blue forms are connected so that the cooling water is in a confined space. Therefore, the horizontal shell condenser is also called a closed shell condenser. The vertical shell-and-tube condensers are often located on a collecting basin with the upper and lower ends without covers, but the upper end is provided with a water-dividing tank. After the cooling water is distributed through many water separators in the water compartment, it enters into each heat transfer hole, and after it absorbs heat from the pipe wall, it flows out from the lower end and falls into the water pool. Therefore, the vertical shell-and-tube condenser is also called the open shell. Tube condenser.
How can a chiller save more power? In modern people's lives, everyone advocates energy saving, electricity saving, and environmental protection, saving existing energy consumption, promoting the development of environmentally friendly new energy, and benefiting the society. In the industrial chiller industry, how can chillers save more power? Three points of daily operation can make the chiller more energy-efficient.
First, prevent and reduce the fouling of pipelines of industrial chillers to improve the heat transfer efficiency of condensers and evaporators. Make-up water If the water treatment is not done well, calcium carbonate and magnesium carbonate, which are heated by calcium bicarbonate and magnesium bicarbonate, will deposit on the pipeline. The heat-conducting performance is lowered, the heat exchange efficiency of the condenser and the evaporator is affected, and the electricity cost of operating the chiller is greatly increased. In addition to the use of water treatment technology, pipelines can also be periodically cleaned by automatic cleaning equipment to save power while improving the cooling effect of chillers.
Second, adjust the reasonable operating load of industrial chillers. In the case of ensuring the safe operation of the chiller, the host group operates at 70%-80% load ratio and operates at 100% load, and the unit cooling power consumption is smaller. The use of this method to boot should be combined with the operation of the water pump and cooling tower.
Third, reduce the condensing temperature of the industrial chiller. To meet the chiller safety and production requirements, try to increase the evaporation temperature and reduce the condensing temperature. For this purpose, it is necessary to increase the reconstruction of cooling towers to ensure the effectiveness of cooling water.
Johnson Machinery Tips: Industrial chiller can provide industrial chilled water for all walks of life. The chillers used can be centralized, each cooling unit meets a variety of needs, or dispersed in each application or device that has its own refrigeration equipment, each with its advantages. The more commonly used industrial chillers include: screw chillers, air-cooled chillers, water-cooled chillers, low-temperature chillers, open chillers, and chillers. However, customers should choose how to use chillers suitable for their own production. Actual demand for production equipment to determine the chiller models and models. You can see "There are many types of chillers. Did you choose the right one? 》Choose the chiller models and models.
Outdoor Bench
Outdoor bench refers to the seating facilities used in outdoor places, often commonly found in parks, squares, leisure areas, scenic spots and other outdoor environments. The classification of outdoor benches can be introduced according to many aspects such as material, shape and function.
First, classification by material
1. Wooden bench: Wooden bench is one of the most common outdoor benches, usually made of natural wood, with natural and environmentally friendly characteristics. Wooden benches are usually made of solid wood or artificial wood, and the surface is treated with waterproof and anti-corrosion, which can adapt to various climatic conditions in the outdoor environment.
2. Metal bench: Metal bench is made of metal materials, such as cast iron, steel, etc. The metal bench is durable, corrosion resistant, easy to clean and is suitable for all kinds of outdoor environments.
3. Stone bench: Stone bench is made of marble, granite and other stone, which has the characteristics of good texture and beautiful appearance. Stone benches are generally suitable for high-end places such as garden scenic spots and can be integrated with the surrounding environment.
5. Combined material bench: Combined material bench refers to the bench made of different materials, such as the combination of wood and metal, stone and plastic combination. Combined material bench can usually combine the advantages of different materials, more in line with the needs of different outdoor environments.
2. Classification by shape
1. Linear bench: Linear bench is the most common shape of bench, generally composed of a row of seats, forming a straight line arrangement. The linear bench is suitable for outdoor places with large pedestrian flow and can provide more seats.
2. Arc bench: Arc bench is an arc bench composed of multiple seats, usually used in a ring seat area or landscape area. The curved bench can not only provide comfortable seating, but also increase the aesthetics of the place.
3. Wavy bench: The wavy bench is a bench composed of multiple seats in the shape of undulating waves, giving people a sense of movement and flow. The wavy bench is suitable for parks, squares and other places that need to increase vitality and fun.
4. Round bench: A round bench is a round bench composed of a number of seats, which is usually used in outdoor recreation areas and can provide a place for groups to gather.
3. Classification by function
1. Leisure bench: Leisure bench is a common form of outdoor bench, it can provide comfortable seats, so that people can relax in the outdoor environment.
2. Viewing bench: Viewing bench is usually set in a scenic outdoor environment, providing comfortable seats for people to enjoy the scenery.
3. Sitting bench: Sitting bench is usually set in parks, squares and other places with large traffic, to provide people with a short rest and relaxation.
4. Cool pavilion bench: Pavilion bench refers to a form of combination of bench and pavilion, which can provide sunshade, rain prevention and other functions, suitable for outdoor leisure areas.
In short, the classification of outdoor benches can be divided from many aspects such as material, shape and function. Different outdoor environments and needs need to choose a suitable bench type to provide comfortable and beautiful seating facilities
Beach Bench,Deck Chair,Deck Bench,Waterproof Bench
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