Energy saving space and efficiency of water pumps???

Pump energy saving is now the majority of pump manufacturers and the majority of users are pursuing, pump energy saving has a good development prospect, because with the development of the economy, the reduction of available resources in nature, energy saving is undoubtedly the future development direction, and energy saving can reduce the cost of consumers. Energy saving means that the work efficiency of the pump should be improved, and the basic structure of the pump should be changed compared with the traditional one, such as the self-balancing multistage pump implemented by a pump production and sales enterprise in Changsha Zhonglian Pump Industry is a new type of high-efficiency and energy-saving product.

The energy saving of the water pump is related to the power and efficiency of the water pump.

The space of the pump is related to the size of the pump.

The principle of power saving of water pumps.

From the working principle of the water pump, it can be known that the flow rate of the water pump is proportional to the speed of the water pump (motor), the head of the water pump is proportional to the square of the speed of the water pump (motor), and the shaft power of the water pump is equal to the product of the flow rate and the head, so the shaft power of the water pump is proportional to the cubic of the speed of the water pump (that is, the shaft power of the water pump is proportional to the cubic of the power supply frequency). According to the above principle, it can be seen that the power of the pump can be changed by changing the speed of the pump.

Flow Basic Formula:

q∝n h∝n2 kw=q*h∝n3

The above q represents the flow rate, n represents the speed, h represents the head, and kw represents the shaft power.

For example, if the power supply frequency is changed from 50Hz to 45Hz, then P45 P50 = (45 50)3=, that is, P45= P50;

If the power supply frequency is changed from 50Hz to 40Hz, then P40 P50 = (40 50)3=, that is, P40 = P50.

The water pump is generally considered according to the maximum working condition demand of the water supply system in the design, and the water system may not be able to reach the maximum amount of water in actual use for a lot of time, and the resistance of the system is generally increased by valve adjustment to throttle, resulting in the loss of motor electricity, and the use of power saver can make the system work smoothly and stable, adjust the water by changing the speed, and can recover the investment by reducing the speed to save energy. From the figure below, we can vividly see the comparison of the three flow control methods.

See where on the performance curve your pump is running and whether it deviates from the efficiency zone.

The efficiency of a water pump refers to the ability of the pump to convert the input mechanical energy into the kinetic energy of the water, that is, the ratio of the power output of the pump to the power input. Generally speaking, the higher the efficiency of the pump, the lower the input power required if the output flow rate and head are the same.

The efficiency of a pump is affected by a variety of factors, including the design of the pump, the point of operation of the pump, the speed of the pump, the loss of the pump, and the matching between the pump and the piping system. Among them, the design of the pump is one of the most important factors affecting the efficiency of the pump. For example, optimizing the design of the impeller and pump casing so that the water flows more smoothly through the pump can reduce the resistance of the pump and the vortex loss of the water flow, thereby improving the efficiency of the pump.

The efficiency of a pump is usually expressed as a percentage, and in general, the efficiency of a high-efficiency pump can reach more than 60%, while the efficiency of an inefficient pump may only be around 30%. For some pump systems that need to run for a long time, improving the efficiency of the pump can not only reduce energy consumption and operating costs, but also reduce the negative impact on the environment.

Pump efficiency is the ratio of the effective power of the pump to the shaft power. η=pe/p

The effective power is the gravity of the medium (per cubic meter per cattle) multiplied by the head (per meter) multiplied by the flow rate (cubic meters per second) divided by 1000. Denoted by PE.

Shaft power usually refers to the input power, that is, the power transmitted by the prime mover to the pump shaft, so it is also called shaft power, which is represented by P.

Efficiency refers to the percentage of the ratio of the effective power of the pump to the shaft power, it marks the effective degree of the energy conversion of the pump, and is an important technical and economic index of the pump, which is expressed. The efficiency on the nameplate of the pump corresponds to the efficiency at the time of passing through the design flow rate, which is the maximum efficiency of the pump. The higher the efficiency of the pump, the smaller the energy loss when the pump is working.

The shaft power of the pump is also the motor power of the pump, and because it is the actual use of the process of hydraulic loss and pipe loss and other factors, so the actual power is far less than the rated power of the pump, we will call the actual power to the rated power of the pump efficiency.

At present, I believe that the most effective pump energy-saving technology is not a single one, but should be comprehensive: 1. Choose a pump with high energy efficiency ratio. 2. Use frequency conversion to adjust the speed. 3. Spray anti-corrosion and water-repellent coating on the overflow part.

Everyone understands the first two items, focusing on the third item: pump corrosion, cavitation and erosion are unavoidable, and then honeycomb pitting and grooves appear on the overflow surface, resulting in increased water flow resistance and corresponding energy consumption. The anti-corrosion and water-repellent coating is to use the water repulsion property of the material itself and the ultra-smooth surface to reduce the coefficient of friction, thereby reducing the shaft power.

Comprehensive three, high-efficiency energy-saving pump and frequency conversion speed regulation can save energy by about 30%-60%, water-repellent coating can save energy by about 10%, the three technologies are used together, will save energy by about 40%--70%, and the water-repellent coating also has anti-corrosion cavitation performance, prolong the life of the pump, and the three combined energy-saving effects are obvious.

Other aspects should also be checked frequently, such as the gap in the corrosion of the mouth ring groove, the friction of the mouth ring against the impeller, especially the old packing seal is too tight, etc., which will reduce the pump efficiency.

The premise of the energy-saving principle of energy-saving water pump is that the hydraulic model design of energy-saving pump is more energy-saving than that of conventional water pump, the mold should be cast with high-precision mold, and the impeller balance needs to be made by using a computer-controlled impeller balancing machine, and the motor used is a high-efficiency energy-saving motor or a permanent magnet motor. For example, the WTP horizontal energy-saving pump produced by the company, the impeller of the horizontal energy-saving pump is an energy-saving impeller designed by three-way flow theory, and the impeller mold is made of high-precision aluminum film through precision casting, and the flow channel of the impeller is particularly smooth. The material of the impeller is made of 304 stainless steel, and the whole impeller is designed with a spiral structure design and cooperates with the impeller drainage ring to ensure that the efficiency of the high-efficiency and energy-saving water pump is more energy-saving on the original basis, and will not increase the current caused by overflow like other pump products.

The amount of water in each circulating water system is difficult to be accurately calculated, the pump engineer will consider various factors such as safety production when calculating the water flow of the system, and will increase the margin of 10% to 20% on the basis of meeting the larger water demand to determine the flow rate of the pump, so as to ensure that the water volume of the whole system is surplus.

In the whole circulating water system, each section of the pipe and elbow will have a certain resistance, the height of the cooling tower position and the resistance and pressure of the heat exchange components will be generated in the system, these resistance can not be calculated very accurately, the resistance value calculated by the pump engineer is only an approximate data, according to this value in the selection of pump head, it is necessary to consider meeting the production needs, and increase the margin of at least 10% to 20% on the basis of overcoming the calculated resistance value for selection. The head of the pump in the whole circulation system is redundant. The turbine of the cooling tower drives the rotation of the wind turbine through this surplus comprehensive energy.

With a motor with high energy efficiency.

Reasonable selection of water pumps, so that the water pump runs at a higher efficiency.

Set up the inverter device.

1. Use a suitable water pump, replace a new pump or a pump with a higher energy efficiency ratio 2. Use frequency conversion mode to adjust according to needs.

3. Use fluid diagnosis energy-saving technology.

The above energy-saving effects are ranked from small to large.

It is important to choose the right industrial pump to achieve effective energy savings. Here are some suggestions for choosing an industrial water pump:

1.Determine the flow rate and head: First, you need to determine the required flow rate and head.

Flow refers to the volume of liquid that can be transported by the pump per unit time, and head refers to the total amount of energy required for the liquid to move from inlet to outlet. Accurately determining the flow rate and head can help select the right pump type and specifications.

2.Choose a high-efficiency water pump: There are many high-efficiency water pumps to choose from in the market.

High-efficiency water pumps often use advanced design and technology to reduce energy loss when delivering liquids. Comparing the efficiency ratio of different brands and models of pumps can help you choose a high-efficiency pump.

3.Consider frequency conversion speed regulation: The speed of the pump can be adjusted by using the frequency converter, and the operating speed of the pump can be adjusted according to the actual demand. This avoids wasted energy at low load and improves overall energy efficiency.

4.Optimize piping design: Properly designed and arranged piping can reduce resistance and pressure loss in the pump system, thereby reducing energy consumption. Make sure the pipe is of the proper diameter and length, and avoid too many elbows and valves to reduce friction loss to the fluid.

5.Regular maintenance and inspection: Regularly maintain and inspect the pump to ensure its proper operation. Cleaning pumps and filters, checking for wear on seals and bearings, and repairing and replacing damaged parts in a timely manner can keep the pump running efficiently.

6.Training and awareness-raising: Training operators to increase their awareness and understanding of energy conservation awareness, teaching proper methods of operating and maintaining pumps, can help reduce unnecessary energy waste.

In short, choosing the right industrial pump and taking effective energy-saving measures can significantly reduce energy consumption and improve the energy efficiency of the system.

There are the following aspects:1It is necessary to meet the requirements of the flow rate and head, that is, the operating condition point of the pump (the intersection point of the characteristic curve of the device and the non-spinal performance curve of the pump) must be kept in the high-efficiency range of operation, so that the power is not easy to damage the machine.

2.The selected pump should not only be small in size, light in weight, cheap in cost, but also have good characteristics and high efficiency. 3.

It has good anti-cavitation performance, which can not only reduce the construction strength of the pump platform, but also prevent the pump body from cavitation, and the operation is stable and the life is long.

1) It is necessary to meet the requirements of flow rate and head, that is, the operation time point of the pump (the intersection point of the characteristic curve of the device and the performance curve of the pump) is often kept in the high-efficiency range, so that it is not easy to save power and not easily damage the parts.

2) The water pump selected by Soqin should not only be small in size, light in weight and cheap in cost, but also have good characteristics and high efficiency.

3) It has good anti-cavitation performance, which can not only reduce the excavation depth of the pump room, but also prevent the pump from cavitation, and run smoothly and have a long life.

4) Build a pumping station according to the selected pump, and the project has low operating costs.

Select the pump to list the basic data:

1. Characteristics of the medium: medium name, specific gravity, viscosity, corrosiveness, toxicity, etc.

2. The diameter and content of the solid particles contained in the medium.

3. Medium temperature: (

4. The required flow rate can ignore the leakage in the pipeline system in the process of the general industrial pump, but the impact on the flow rate must be considered when the process changes. If the agricultural pump is used to transport water through open channels, leakage and evaporation must also be considered.

5. Pressure: suction pool pressure, drainage pool pressure balance punch, pressure drop (head loss) in the pipeline system.

6. Pipeline system data (pipe diameter, length, type and number of pipeline accessories, geometric elevation from suction tank to pressurized water tank, etc.).

There are many ways to reduce the energy consumption of a water pump, but here are some common ones:

Choose the right pump type and specification: Choose the appropriate pump type and specification according to the actual needs to avoid excessive or too small energy consumption.

Adopt high-efficiency and energy-saving motors: The use of high-efficiency and energy-saving motors can greatly reduce energy consumption.

Regular maintenance: Regularly check the operating status of the pump, maintain the normal operation of the pump, and avoid the efficiency of the pump from decreasing due to long-term use.

Reduce resistance loss: Optimize the pipe layout and reduce the number of bends and valves that can be guessed to collapse the pipe, and reduce the resistance when the water flow passes, which can effectively reduce the energy consumption of the pump.

Optimized control strategy: Adopting optimized control strategies such as frequency conversion speed regulation and flow control, the flow rate and head of the pump can be adjusted according to the actual needs to achieve the purpose of lead slow and energy saving.

Use energy-saving accessories: For example, the use of low-resistance valves, shock absorbers, noise reductions and other energy-saving accessories can effectively reduce the energy consumption of the pump.

In short, reducing the energy consumption of water pumps requires a combination of measures from multiple aspects to achieve the maximum energy saving effect.

1. The internal surface of the pump and the inner surface of the pressurized water chamber (also known as the volute) are rusted and uneven. Surface rust and unevenness will reduce the pump water volume by 7%-8%; When overhauling, you only need to use steel brushes and iron sandpaper or grinding wheels to polish and smooth, which can reduce its fuel consumption or power consumption by 9%-14% when working

Second, the gap between the sealing rings increases. According to the test, when the gap in the radius of the impeller is increased by 4 mm, the pump water volume will be reduced by 10%; During maintenance, only organic adhesive and asbestos thread need to be used to restore the specified clearance to the factory, which can reduce the fuel consumption or power consumption of the pump by 10%-12% when working

3. The axis of the pressurized water chamber and the impeller does not coincide. According to the test, when the axis of the pressurized water chamber and the impeller deviates by 2 mm or the declination angle is greater than 2 degrees, the pump water volume will be reduced by 5%-6%; If you only need to measure carefully and carefully find the position where the axis coincides, you can reduce the oil or power consumption of the pump by 6%-7% when working

Fourth, the angle of the blade is inconsistent. When the blade installation angle is inconsistent, the water volume of the liquid pump will be reduced by 5%; During maintenance, the angle ruler should be used to measure accurately and install the alignment firmly, which can reduce the fuel consumption or power consumption of the pump by 5%-6% when working