Balance valve technology and features and functions
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2. <br> <br> balancing valve functions as HVAC engineering and technical personnel, in order to achieve a stable balance of design and installation of centralized heating and cooling system to create a comfortable artificial environment, and to fully understand the function of balancing valve in the system Correct application is very necessary. Balance valves are used in water systems for heating and air conditioning. The main problems that can be solved are the following:
1) Resolve uneven distribution of circulating water flow in heating and air conditioning systems (equivalent to the fact that floors or rooms in central heating are always overheated or undercooled, and some rooms are never hot or cold).
2) Solve the difference in the use of time in the system operation, resulting in some users of heating and air conditioning system, the circulating water flow is high and low, leading to room temperature fluctuations, poor comfort (equivalent to central heating, use fewer users during the day, Long-term heating room temperature is too high, the number of users at night, the room heating temperature is low), can never reach a stable and comfortable environment; especially at low and medium load, although the terminal equipment has a sophisticated controller.
3) Resolve the impact of fluctuations in the number of users involved in the system operation, increase the frequency of repeated opening and closing of the cooling or heating host, increase system energy consumption, and affect the service life of the host.
4) Solve the problem that certain rooms will never reach the required design temperature, especially when the load changes.
5) Although the rated power of the production equipment is sufficient, the designed power cannot be transmitted, especially during start-up after weekend or night return.
The above problems are only superficial phenomena that we can directly feel in the operation of a balanced centralized heating and cooling system. The increase in system energy consumption and the significant increase in operating costs that are hidden in deep levels are the problems that we must seriously face. Problems; At the same time, the comfort of the system will be greatly reduced.
1. Balance valve technology and features:
At present, in China, the phenomenon of hydraulic imbalance (disequilibrium) in the centralized heating and cooling pipe network system is still very serious, and the hydraulic imbalance is one of the main causes of energy waste in heating, and at the same time, the hydraulic balance is the guarantee. The premise of other energy-saving measures can be reliably implemented. Therefore, for system energy saving, hydraulic balance should first be achieved, and the system must be forced to achieve hydraulic balance. Practice has proved that the balancing valve is the most basic balancing element for achieving hydraulic balance of the system. Through the correct setting and reasonable application of the balancing valve, not only can the hydraulic stability of the entire water system be improved, including the balance of the control ends and the balance of the risers. The balance of the main circuit can make the system reach the customer's required temperature and comfortable artificial environment in the shortest time and energy consumption, and can greatly reduce the energy consumption of the system; and the prerequisite for the rational application of the balance valve is to fully understand the And understand the balanced valve function, the technical characteristics of the balance valve, the system's hydraulic imbalance characteristics and the design system needs to solve the problem of balancing valve to solve the problem, the Shanghai Jiang Sen valve factory prepared this article for this in-depth discussion for everyone in the project Reference and application in design selection.
2. The function of the balancing valve as a HVAC engineering and technical personnel, in order to design and install a balanced and stable centralized heating and cooling system to create a comfortable artificial environment, it is necessary to fully understand the function of the balancing valve and correctly apply it in the system. of. Balance valves are used in water systems for heating and air conditioning. The main problems that can be solved are the following:
1) Resolve uneven distribution of circulating water flow in heating and air conditioning systems (equivalent to the fact that floors or rooms in central heating are always overheated or undercooled, and some rooms are never hot or cold).
2) Solve the difference in the use of time in the system operation, resulting in some users of heating and air conditioning system, the circulating water flow is high and low, leading to room temperature fluctuations, poor comfort (equivalent to central heating, use fewer users during the day, Long-term heating room temperature is too high, the number of users at night, the room heating temperature is low), can never reach a stable and comfortable environment; especially at low and medium load, although the terminal equipment has a sophisticated controller.
3) Resolve the impact of fluctuations in the number of users involved in the system operation, increase the frequency of repeated opening and closing of the cooling or heating host, increase system energy consumption, and affect the service life of the host.
4) Solve the problem that certain rooms will never reach the required design temperature, especially when the load changes.
5) Although the rated power of the production equipment is sufficient, the designed power cannot be transmitted, especially during start-up after weekend or night return.
The above problems are only superficial phenomena that we can directly feel in the operation of a balanced centralized heating and cooling system. The increase in system energy consumption and the significant increase in operating costs that are hidden in deep levels are the problems that we must seriously face. Problems; At the same time, the comfort of the system will be greatly reduced.