Presentation of climate information for calculating annual energy consumption by air conditioning systems

Abstract

In the present work, climate models were presented, which are intended for calculating energy consumption of air conditioning systems, spent on processing the outdoor air to supply it to the room as a supply air, and on the assimilation of heat from external and internal sources. Currently, the number of buildings is growing, in which the bulk of the heat surplus is made up of internal heat. Therefore, for such buildings, a climate model is needed that contains only data on the repeatability of combinations of temperature and humidity of the outside air. Such a model is a probabilistic-statistical climate model. To calculate the energy consumption of air conditioning systems in rooms with a load formed due to heat transfer through external building envelopes and the direct penetration of the heat of solar radiation, we need a model that contains not only the mentioned probabilistic characteristics, but also changes over time combinations of climate parameters. Such a model is a reference year. The article presents data on the development of a reference year for the city of Hanoi and shows that when assimilating only internal heat surpluses it is advisable to use a probabilistic-statistical model, that provides a much more accurate result.

Impact of design parameters of outdoor air on the energy performance of air conditioning systems

“…In Vietnam, we do not consider data sets with each parameter separately, but a general set of data on the temperature and enthalpy of outdoor air observed together. From such an array, the highest values of the jointly observed parameters are thrown out, the duration of the joint observation of which corresponds to the same time security coefficient [16,17]. Therefore, the calculated values of the parameters are higher than when the parameters are considered separately.…”

Estimation of energy efficiency of water heating systems in terms of electricity consumption

“…It is impossible to achieve precisely the necessary heat transfer of heaters under changing conditions of the external climate and internal thermal conditions throughout the entire heating season only at the expense of qualitative regulation. This is due to the fact that in each separate building of civil buildings there is its unique heat balance, which depends on many unpredictable or poorly predicted facts [7]. Therefore, for more precise regulation, the node and individual quantitative control [8].…”