the basic principle of energy-saving control of load follow-up management & Rdquo, energy-saving transformation of Wanshu technology fan; The system is the best energy-saving product of central air-conditioning system-the energy-saving control system of load follow-up tracking management, which is developed by combining advanced load follow-up control theory with aggregate system technology. It adopts load follow-up tracking mode, uses computer and integrated system, and collects various change parameters according to the operating conditions and terminal load changes of the main engine and auxiliary engine system of central air conditioning. Then, through load follow-up calculation, the refrigeration (temperature) water pump, cooling water pump, cooling tower fan and other equipment are automatically optimized in real time, and the operating environment of the central air conditioning host is optimized. So that that flow rate of the main engine working medium and various fluid of the auxiliary engine system change synchronously with the change of the terminal load, and the energy consumption of the central air conditioning system is greatly reduced on the premise of ensuring the comfort of the central air condition system.
Product features of energy-saving control of load tracking management:
★ High efficiency and energy saving.
the general frequency conversion energy-saving system can only save energy (11%-51%) for the feed water pump system, while the load follow-up management tracking energy-saving control system is an energy-saving transformation for the whole system, including the air-conditioning host and auxiliary machines, which can save energy for the central air-conditioning auxiliary machine system by 61%-81%, the host machine system by 11%-31% and the whole machine by 25%-51%!
★ improve work efficiency.
the centralized management of air conditioning host, cold and warm water pumps, cooling water pumps, cooling tower fans and other equipment has been realized.
★ automatic control.
The customized computer software control system controls the start, linkage, stop, reset, alarm, etc. of the peripheral related equipment of the central air conditioner.
★ The operation is stable and safe.
adopt soft start-stop mode and low-frequency operation mode to control the water pump and fan, so as to avoid impacting the power grid, reduce the mechanical wear of the equipment and prolong the service life; All key equipment and devices adopt high reliability products; The system software and hardware are set with multi-level interlocking to ensure the safe operation of the system.
★ Reduce operation and maintenance costs.
realize unattended operation, and save operation managers.
★ prolongs the service life of the equipment.
It can realize the soft start/stop and low-frequency operation of water pump and fan, without impacting the power grid and reducing the mechanical wear of equipment.
★ Easy to master and operate, energy-saving transformation of Wanshu motor drive system.
provides an intuitive graphical interface and rich charts.
★ improve environmental protection.
it can reduce the emission of carbon dioxide and hot gas to the atmosphere and reduce the pollution to the air environment. Reduce the loss of freon, reduce the water loss of freezing and cooling water, and also reduce the environmental pollution caused by equipment noise.
Overall composition of energy-saving control system for load tracking management and energy saving
(The following figure is for reference only, Specifically, it is customized according to the specific model of the air conditioner)
System function of load tracking management and energy-saving control
● Automatic control
○○○○○○○○○○○○○○○○○○○○○ Stop and operation parameter setting
cooling tower fan system startup, Setting of stop and operation parameters
● status monitoring function
○ communication status of each subsystem
○ chilled water system operation condition
○ cooling tower system operation condition
● system management function
○ system operation record
○ energy efficiency curve display
○ operation record
.
※ The water pump system is designed according to constant flow. When the load is small, the bypass system is used to solve the problem of constant flow, and then the cooling system discharges heat into the air, resulting in large flow and small temperature difference, which reduces the efficiency of the main engine;
※ It is impossible to track the actual terminal load change to provide the required energy;
Therefore, the constant flow system, like a squirrel, devours the energy wealth created by owners and human beings.
Comparative analysis of domestic central air-conditioning energy-saving technologies
Because of the huge energy consumption of central air-conditioning, the research on energy-saving technologies of central air-conditioning has never stopped. At present, there are several energy-saving schemes available in the market, but compared with similar technologies and products, our central air-conditioning energy-saving experts have obvious advantages. The following is a comparative analysis of several energy-saving schemes:
1. Heat exchange (waste heat utilization):
When the return air and fresh air of the indoor air conditioner respectively flow through the heat exchange core in a positive cross way, due to the temperature difference and water vapor pressure difference between the air flows on both sides of the flat partition, the heat and mass transfer phenomenon occurs between the two air flows at the same time, causing the total heat exchange process. This process is completed by the flat partition, so it belongs to the transparent total heat exchange phenomenon. When the total heat exchange fresh air fan installed on the system runs in summer, the fresh air can cool from the air conditioning return air to reduce the temperature, and at the same time, it is dried by the air conditioning return air to reduce the moisture content of the fresh air; When running in winter, the fresh air gets heat energy from the air-conditioning return air to raise the temperature, and at the same time, it is humidified by the return air to increase the moisture content of the fresh air, so that the fresh air can recover energy from the air-conditioning return air through the total heat exchange process of the heat exchange core, and the energy saving range is low.
3. Water (ice) cold storage:
The energy-saving method of water (ice) cold storage is to avoid the peak of electricity consumption during the day, store the chilled water of air conditioner continuously at night, and only use the water system circulation during the day to save money (enjoy the peak? Low electricity price difference). This method is cost-saving but not electricity-saving, which is greatly influenced by the policy, and the air-conditioning host often runs overloaded, which will affect the service life.
4. Energy-saving control system for load follow-up management:
Follow-up energy-saving control is characterized in that the supply and return temperatures of cold and warm water in the air conditioning system are kept constant, and the inlet and outlet temperatures of cooling water are kept constant. When the air conditioning load changes, the water supply and air volume are adjusted to meet the needs of system load change. The biggest advantage of energy-saving control of load tracking is that the energy consumption of the system decreases with the decrease of load. The load tracking energy-saving control system adapts to the change of air conditioning load by changing the cold and warm water flow rate, cooling water flow rate and air flow rate of cooling tower fan, and ensures that the host system is always at the optimal working point, so that the efficiency (COP value) of the air conditioning system is always kept at the maximum.
if a control method can be found to make the output of each pump group and cooling tower fan of central air conditioner change synchronously with the change of load, the maximum energy saving of air conditioning system can be realized on the premise of ensuring the load demand. This point is realized by the follow-up tracking energy-saving control system. The energy saving is 61% ~ 81% in the auxiliary system, 11% ~ 31% in the main system, and the comprehensive energy saving is more than 25%.
energy-saving scheme
general frequency converter
waste heat utilization
water (ice) storage
load follow-up management
energy-saving control system
energy saving of pump group
21%~31%
11%
None, However, the cost is
61%~81%
the main engine is energy-saving
there is no
21%~41%
control principle
variable frequency speed regulation
heat exchange
avoiding power consumption peak
using circulating water
computer+servo control+variable frequency speed regulation
.
local tracking
no
no
large range, real-time tracking of the whole system
operation stability
easy to fluctuate. Xiamen Wanshu Science and Technology Air Compressor is energy-saving, unstable
safe and reliable
harmful to the main engine
soon reaches a stable state, safe and reliable
resources * * enjoy. Realize resource * * * Enjoy
Operation management
Manual attendance
Manual attendance
Remote networking management, unattended operation
Central air-conditioning energy-saving transformation service process:
1. Sales supervisor gets back the customer information:
Sales supervisor knows the basic situation from the customer, collects some customer information and registers the project, or.
2. solutions provided by the engineering department:
professionals of our company analyze the energy situation of customers and evaluate the proposed energy-saving transformation measures. On the basis of energy analysis, provide customers with the design of energy-saving transformation scheme, including project feasibility analysis and design scheme and energy-saving effect prediction, and provide quotations for energy-saving products.
3. The technical department discusses and passes the solution:
At this stage, the senior engineers of our company discuss, modify, review and finally pass the solution.
4. the marketing department provides the draft sales contract:
the marketing department drafts the draft sales contract, and the customer proposes amendments to the contents of the contract until both parties reach an agreement.
5. Formal signing of contract:
After reaching an understanding with customers on the energy-saving renovation scheme, the company will sign a sales contract with customers in the principle of fairness and justice, which will stipulate the responsibilities and obligations of both parties, the acceptance method of the project, the sharing method of benefits, and the monitoring method of energy saving.
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