| Abstract [eng] |
The purpose of this master’s thesis is to perform an energy and economic evaluation of the equipment ensuring Lithuanian food stores microclimate and to compare the obtained results on a Lithuanian scale. After analysing the modern technologies of the microclimate equipment, measures to increase energy efficiency have been developed. For assessing the current state of the microclimate equipment, temperature measurements were taken in the ventilation equipment to calculate the existing recuperation temperature efficiency in real objects. After forming the annual heating / cooling needs for microclimate equipment, potentials of the applied efficiency improvement measures were calculated, and an economic evaluation was made. Based on the developed methodology, the measures of economic and energy efficiency were determined. It turned out that the replacement of cooling and air conditioning equipment which has the greatest potential for energy savings has proven to be economically unviable at all sites. Demand for indoor cooling is not high, so it is useful to continue operating existing cooling equipment. The maximum energy and economic value come from the replacement of air handling units, as not only electricity but also thermal energy can be saved. The highest energy saving potential with the lowest investment is possible by applying the EC motor integration to existing air handling units. |
