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Information × Registration Number 0220U104490, 0119U102330 , R & D reports Title Increasing the energy efficiency of buildings using recuperative geothermal ventilation popup.stage_title Head Nedbailo Oleksandr M., Доктор технічних наук Registration Date 19-12-2020 Organization Institute of Engineering Thermophysics of NAS of Ukraine popup.description2 Comprehensive experimental studies and comparison of their data with the results of calculations on the developed numerical model of complex heat transfer processes made it possible to analyze the thermal parameters of air-ground heat exchangers with different pipeline diameters. Using the developed numerical model of operation of the air-ground heat exchanger, the calculation of thermal parameters of the heat exchanger was performed under the condition of using pipelines with different typical outer diameters - 110, 160 and 200 mm. The values ​​of air temperature at the inlet to the heat exchanger and air velocity at the outlet were set as initial data. The latter was taken from experimental data and amounted to 5.5 m/s. The value of the outer diameter of the air-ground heat exchanger pipeline has a very significant effect on the temperature difference between the inlet and outlet. Thus, in the middle of the heating period, when the recuperative ventilation system has a significant contribution of additional heat to the heating system, the optimal value of the temperature pressure is a pipeline with an outer diameter of 110 mm. However, in summer, to ensure air conditioning without violating sanitary and hygienic and construction standards, the outer diameter of the pipeline is 200 mm, which maintains the temperature difference between the outlet and inlet air at 5oC. With such a difference in air temperature values, it becomes possible to abandon the use of additional devices for cooling the supply air and minimize energy costs for air conditioning. In the middle of the heating period, the influence of the outer diameter of the pipeline on the linear heat flow is much more significant. Thus, in the transition from a diameter of 110 mm to 160 mm, the linear heat flux increases, on average, by 30%. At transition from diameter of 160 mm to 200 mm growth of a linear heat stream decreases and makes 16%. Product Description popup.authors Bozhko Ihor K. Goncharuk Svitlana M. Gotsulenko Volodymyr V Lysenko Oksana M. Tkachenko Myroslav V. popup.nrat_date 2020-12-19 Close