«Automation and Informatization of the fuel and energy complex»

An approach to designing district cooling pipeline systems applying the chiller-fancoil technology in an extremely continental climate with a permafrost zone

UDC: 338.(4/9):621.311.22.(571.36)
DOI: 10.33285/2782-604X-2023-8(601)-48-56

Authors:

¹ Larionov Institute of Physical-Technical Problems of the North SB RAS, Yakutsk, Russia
² Melentiev Energy Systems Institute SB RAS, Irkutsk, Russia

Keywords: integrated energy systems, district cooling, absorption chiller, fancoil, pipeline systems design, hydraulic calculations, permafrost soils, geocryological processes

Annotation:

An approach to designing pipeline networks of integrated heat and cold supply systems based on absorption chillers has been developed. The approach includes the following: simulation of cooling demand; hydraulic calculations of district cooling (DC) pipeline systems; technical and economic calculations for choosing the optimal layout of pipeline systems; compatibility assessment of repair, commissioning works for heating and cooling systems; thermal interaction modeling of a permafrost massif with a pipeline cooling system. It is planned to use the "SOSNA" software package to determine optimal parameters of DC hydraulic systems. The developed approach was tested in the city block of Yakutsk. The optimal layout of the DC system was determined – the inner diameter of the main pipeline is 268,6 mm, the laying of pipelines is underground with direct connection of consumers, the pipeline material is high-density polyethylene. The simulation results of underground pipelines heating processes revealed an insignificant impact of engineering structures on the reliability and bearing capacity of permafrost soils. According to initial estimate, such systems cost of cooling can be 1,9 rubles/kWh, discounted payback period can be 17 years.

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