A Method of Calculating the Thermal Load on the Air-Conditioning and Heating from Ventilation with Heat Recovery
Journal Title: Вентиляція, освітлення та теплогазопостачання - Year 2019, Vol 28, Issue
Abstract
Modern regulatory documentation requires the use of ventilation with heat recovery in residential and public buildings. Most manufacturers of equipment provide a simplified technical documentation that does not allows accurate calculation of the heat load from the ventilation system to the heating and air conditioning systems. The publication provides a method for calculating the thermal load for the design of heating and air conditioning equipment. In residential and public premises in the summer (in the winter time – on the heating system), the thermal load on the air conditioning system depends to a large extent on the mode of operation and the used technology of ventilation. For simplicity we will consider the variant with the summer load, as more complex, and the winter variant will be calculated similarly. Due to the stiffness of the requirements for energy efficiency of buildings, the transition to the use of a combined ventilation scheme has actually taken place: 1 – constantly operating general exchange combined extract and input ventilation with heat recovery; 2 – periodically running straight-line exhaust ventilation from the toilets, bathrooms, kitchens and local ventilation from the technological equipment. The method of calculation of heat load presented in the article not only gives the opportunity to precisely select the equipment for the heating and air conditioning system, but also perform in several variants a numerical modelling of the process of energy consumption to maintain specified microclimate parameters and choose the mode of greatest energy efficiency. This method makes it possible to conduct an economic analysis of capital costs when selecting the whole set of equipment and obtain the optimal configuration. An increase in the size of the fuel system at a fixed flow rate leads to an increase in the coefficient of recovery and a decrease in the cost of the heat generator and the air conditioner, due to a decrease in the load on them.
Authors and Affiliations
M. Kordiukov
Keywords
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- EP ID EP605855
- DOI 10.32347/2409-2606.2019.28.36-40
- Views 38
- Downloads 0
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