Functioning Efficiency of the Central Air-Conditioning System on the Selected Example

Abstract

One of the particularly significant threats during exploitation is the climatic threat, which is associated with an increase in the overall costs that are allocated to combating it. The rise in the virgin temperature of the rock mass by 1oC increases the demand for the required cooling capacity to be taken from the air. The publication assesses the effectiveness of the air-conditioning installation by testing its operation on a selected example. The assessment of the efficiency of the air-conditioning installation for a selected hard coal mine showed that none of the five tested coolers achieved the maximum assumed rated power. The use of total power (7.5 MW) in mining excavations was less than 50% and amounted to η = 0.472%. The research showed that the main reason for obtaining low cooling parameters is the inability to locate them in the place of the highest air temperatures. The other problem is an insufficient airflow rate of cooling water supplied to the coolers at too high temperature. The above considerations indicated that the cooling power from built-in air- conditioning systems is not properly and effectively used. Improving the efficiency of its functioning is possible by proceeding research that will eliminate the above factors and by using air conditioning equipment, taking into account the periodic audit of their work to reduce electricity consumption.

Energy-Saving Control Method of Building Central Air Conditioning Based on Genetic Algorithm

“…e function of total energy consumption of all air conditioners throughout the day was set as quadratic function (3), where C was a constant and its value was related to electricity price and energy consumption. For the ith air conditioner, the total amount of energy consumed in one day was as follows.…”

“…As for building energy consumption, energy consumption caused by electricity demand occupies a large proportion, especially for central air-conditioning system, as shown in Figure 1. erefore, based on the background, the energy-saving control system of central air conditioning based on genetic algorithm was constructed to investigate a more energy-e cient central air-conditioning system of buildings, so as to reduce the massive energy consumption caused by the air-conditioning system [3].…”