Energy conservation optimization system for central air conditioner

Abstract

The invention relates to an energy conservation optimization system for a central air conditioner. The energy conservation optimization system comprises a water chilling unit, a chilled water system, a cooling water system and a cooling tower system. The cooling water system and the cooling tower system are connected with the water chilling unit, a circulation pipeline between the cooling water system and the water chilling unit is provided with a cooling water outlet temperature sensor and a cooling water return temperature sensor, and a circulation pipeline between the cooling tower system and the water chilling unit is provided with a cooling water outlet temperature sensor and a cooling water return temperature sensor. The chilled water system is connected with the water chilling unit, and a flow sensor, a chilled water outlet temperature sensor and a chilled water return temperature sensor are installed on a circulation pipeline between the chilled water system and the water chilling unit. By means of the energy conservation optimization system, the sensors installed on all the circulation pipelines are used for transmitting collected data into a control system and analyzing the collected data, a mathematical model is established based on a genetic algorithm, and therefore the optimal working condition values of all the systems are calculated to control the running power of frequency converters in all the systems; and the water inlet and outlet amount of the central air conditioner is distributed by automatically adjusting the opening degree of an electric adjusting valve, and therefore it is ensured that the central air conditioner system can run stably under the optimal working condition, energy consumption is reduced, and the energy conservation purpose is achieved.

Description

technical field [0001] The invention belongs to the field of air conditioning and energy, in particular to a central air conditioning energy saving optimization system. Background technique [0002] In the 21st century, building energy consumption, together with industrial energy consumption and transportation energy consumption, has become the three "big energy consumers" in China's current energy consumption. According to statistics, among the nearly 2 billion square meters of buildings built every year in the country, more than 95% of them are high-energy buildings. However, in my country's existing 21.5 billion square meters of public buildings, the energy-saving compliance rate is still less than 10%. As a "big household" of energy consumption, the energy saving of the central air-conditioning system has a great relationship with the building energy-saving standards. In developed countries, HVAC energy consumption accounts for 65% of building energy consumption. If bu...

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Problems solved by technology

However, in my country's existing 21.5 billion square meters of public buildings, the energy-saving compliance rate is still less than 10%.

[0005] (2) Comfort The central air-conditioning system is a multi-parameter, nonlinear, and time-varying complex system. Due to frequent fluctuations in the end load, the operating parameters of the system circulation solution chilled water, cooling water, and refrigerant solution will inevitably deviate from those of the air conditioner host. Optimum working condition will reduce the heat conversion efficiency of the main engine, and the long-term operation of the system in a low-efficiency state will also increase the energy consumption of the system;

[0006] (3) When starting and stopping high-power water pumps and fans under power frequency conditions, the impact current is large, which is not conducive to the safe operation of the power grid. Moreover, electromechanical equipment such as water pumps and fans have been running at high speed under power frequency rated conditions for a long time, causing serious mechanical wear and tear, causing equipment Increased failures and shortened service life

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