Ventilating air-conditioning system for underground hydropower station plant and operating control method thereof

Abstract

The invention discloses a ventilating air-conditioning system for an underground hydropower station plant and an operating control method thereof. The ventilating air-conditioning system comprises a monitoring unit, an automatic control unit, an operation interface and a performing unit, wherein the monitoring unit, the operation interface and the performing unit are separately connected to the automatic control unit; the monitoring unit comprises a temperature monitoring module and a generating set operating load monitoring module which are separately used for obtaining an air temperature ofa place in which each temperature sensor is located and real-time monitoring data of the generating set operating load; the automatic control unit comprises a thermal load calculating functional module and a critical temperature calculating functional module; the performing unit consists of a plurality of pieces of ventilating air-conditioning equipment; and the operation interface is used for inputting ventilation amount of each place, ventilation amount of each variable-air-quantity operation scheme and a corresponding ventilation equipment starting condition. The ventilating air-conditioning system can control the ventilating air-conditioning operation scheme according to the generating set operating working condition and the ventilating air-conditioning system inlet air temperature, utilizes natural resources to the greatest extent, and avoids waste of energy.

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...

AI Technical Summary

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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