Air conditioning units operating with constant air volume may waste fan power consumption
When the seasonal changes and process adjustments cause changes in the air conditioning indoor load, if the air conditioning unit is still operated with constant air volume, the fan power consumption may be wasted. Due to the high atmospheric humidity during the Huangmei season, the heat is required to be reheated after dehumidification, causing the cooling and heat to cancel each other. . If the air-conditioning unit is operated with variable air volume, that is, the fan in the unit adopts frequency conversion speed control or adopts two-speed fan, the fan speed and running air volume can be changed in time according to the change of the cooling and heating load of the workshop, and the air conditioning energy consumption can be saved. According to the operating characteristics of the fan, it can be seen that when the fan speed changes, the fan air volume and power have the following changes: According to the above formula, when the air volume is reduced to the rated air volume, the power consumption is reduced by more than half, and the production of the tobacco industry is regulated by the production volume. Due to seasonal changes, process adjustments and other factors, the air conditioning system has more than one year of work in less than the load. For example, the annual energy research and utilization of the partial load downwind year is calculated according to the calculation, then the actual operating power is: the combined power of the factory combined air-conditioning box is the total, and the air-conditioning system is calculated according to the annual operating hours, then the variable air volume is used. The power saving of the box is proved by facts. The air volume of the air conditioning system of the cigarette factory is controlled by the design air volume for most of the year, so that it will not affect the airflow organization of the workshop, and the economics of the air conditioning system will become more reasonable.
The air-conditioning system adopts energy-saving automatic control. In different seasons, the automatic control of temperature and humidity of the air-conditioning system needs to adjust different actuators. For example, the main control table in the summer has a cold valve opening degree to achieve the dehumidification and cooling effect, and in winter, the humidification valve is mainly controlled to humidify and control the heating. The opening of the valve is used to heat up. In the past, the calendar table was used to plan the seasonal conditions. Due to the variability of outdoor meteorological parameters, sometimes the outdoor air temperature and humidity fluctuations were very large even on the same day (the transition season was particularly obvious). The division of conditions often results in large fluctuations in temperature and humidity in the air-conditioned area many times throughout the year, which can not meet the design requirements and greatly waste energy.
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