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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Gulyazov D.G. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Valiullin M.A. – candidate of technical sciences, associate professor Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1
Title of the articleStudy of hydraulic resistance of heating appliances made of copper tubes with three-way faucets and thermostatic valves
Abstract.Modern heating systems have ever-changing thermal conditions during operation. New standards of design, solutions, materials and construction of pipes and shut-off and control valves used today in heating systems are developing these complex dynamic systems. In these circumstances the experts and designers must possess a variety of data and specific applications of modern control valves used in standardized units from pipes of different materials and properties. The calculating method for one-pipe heating systems based on the characteristics of the unit's resistance is not adequately provided with the experimental data and can be used only for steel pipes. Meanwhile, various types of pipes have different mechanical, hydraulic and operational characteristics, which have different effects on the processes of hydrodynamics and the distribution of heat flow in the heating system. A significant influence on these processes is provided by using of thermostatic valves of various designs and heating appliances of foreign firms. The present paper performs the results of experimental determination of the reduced resistance coefficient of heating appliances with the copper pipes. The test results are given at the different positions of flow controlling armatures with using of three-way valves and one-way valves, produced by the «Hertz» company. These data are important for designers and experts in the field of heating.
Keywords.Heating appliance, copper pipes, thermostatic valve, pass valve, reduced coefficient of local resistance.
For citations:Gulyazov D.G., Valiullin M.A. Study of hydraulic resistance of heating appliances made of copper tubes with three-way faucets and thermostatic valves // Izvestiya KGASU. 2012. №1(19) P.89-93.

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