Ventilation and air-conditioning system and operation control method for underground hydropower plant building

Abstract

The invention discloses a ventilation and air conditioning system for an underground power station workshop and an operation control method thereof. The ventilation and air conditioning system comprises a monitoring unit, an automatic control unit, an operation interface and an execution unit, and the monitoring unit, the operation interface and the execution unit are respectively connected with the automatic control unit ; The monitoring unit includes a temperature monitoring module and a generator set operating load monitoring module, which are respectively used to obtain the real-time monitoring data of the air temperature and generator set operating load at the location where each temperature sensor is located; the automatic control unit includes a thermal load calculation function module, a critical temperature calculation module Function module; the execution unit is composed of several ventilation and air-conditioning equipment; the operation interface is used to input the ventilation volume of each place, as well as the ventilation volume of each variable air volume operation scheme and the opening status of the corresponding ventilation equipment. The invention can adjust the ventilation and air-conditioning operation scheme according to the operating condition of the generator set and the change of the inlet air temperature of the ventilation and air-conditioning system, maximize the utilization of natural resources, and avoid waste of energy consumption.

Description

technical field [0001] The invention belongs to the technical field of ventilation and air-conditioning system control, and in particular relates to a ventilation and air-conditioning system of an underground hydropower plant and an operation control method thereof. Background technique [0002] For underground hydropower plant buildings, which are usually deeply buried underground projects, the cooling load and thermal load of the enclosure structure are small, and the main source of load is the heat dissipation of the equipment. There are many heat dissipation equipments in the underground workshop, and the heat dissipation is large, resulting in a large design load of the ventilation and air conditioning system. The powerhouse of the underground hydropower station is mainly divided into the main powerhouse, the busbar tunnel and the main transformer tunnel. The main powerhouse and the main transformer tunnel are connected through the busbar tunnel. Among them, the main po...

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Problems solved by technology

The operation mode of such a ventilation and air conditioning system has the following disadvantages: on the one hand, since the generator set does not operate continuously at full load, the actual heat load of the underground powerhouse changes with the operation schedule, and the existing ventilation and air conditioning system has disadvantages. Necessary waste of energy; on the other hand, the outdoor temperature fluctuates greatly, and the outdoor temperature will be relatively low in the air-conditioning season. At this time, if the existing air-conditioning scheme is still adopted, unnecessary energy waste will be caused; and, With the change of outdoor temperature in the ventilation season, if the ventilation volume of the existing ventilation system is always adopted, it will also cause waste of energy

[0004] In addition, the ventilation and air conditioning system of the existing underground hydropower station is converted according to the outdoor temperature, and there are the following problems: 1) the outdoor temperature fluctuates greatly and is unstable; When entering the underground wind tunnel, heat exchange occurs with the rock mass of the cave wall. Therefore, the outdoor temperature and the effect of the wind tunnel on the air jointly determine the inlet air temperature of the ventilation and air conditioning system, and the length of the wind tunnel, the radius of the wind tunnel, and the air volume have The natural cooling capacity of the wind tunnel has a great influence, and a relatively complicated calculation process is required to obtain the air temperature at the end of the wind tunnel according to the outdoor temperature

Therefore, it is neither accurate nor convenient to use the outdoor air temperature as a parameter to control the conversion of the operation scheme.

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