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Ultima descărcare din IBN: 2022-07-07 10:11 |
Căutarea după subiecte similare conform CZU |
621.577:697.7 (1) |
Пневмоэнергетика. Машины и инструменты. Холодильная техника. Холодильное оборудование (61) |
Отопление, вентиляция и кондиционирование воздуха в зданиях (61) |
SM ISO690:2012 ШИТ, М., ПАЦЮК, В.И., JURAVLIOV, Anatoli, БУРЧИУ, В.И., ТИМЧЕНКО, Д.. Управление теплообменным аппаратом с переменной площадью поверхности теплообмена. In: Problemele Energeticii Regionale, 2019, nr. 1(39), pp. 90-101. ISSN 1857-0070. DOI: https://doi.org/10.5281/zenodo.2650427 |
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Problemele Energeticii Regionale | ||||||
Numărul 1(39) / 2019 / ISSN 1857-0070 | ||||||
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DOI:https://doi.org/10.5281/zenodo.2650427 | ||||||
CZU: 621.577:697.7 | ||||||
Pag. 90-101 | ||||||
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The work deals with the development of a control system for heat exchangers with variable surface area of heat transfer, used, in particular, for heat pumps intended primarily for heat supply systems using the high-quality law of regulation of the heat supply mode (with a constant flow rate of the heat carrier). The aim of the work is to develop a scheme for the control of a heat exchanger with a variable surface area of heat exchange in which main dis-turbances will be compensated: i.e. the temperature of the heat carrier, heat carrier’s flowrates, and changes in the thermophysical parameters of the heat carriers. This goal has been achieved using a custom PID controller in the contour of control of the drive of the mov-ing heat-insulating insert. To solve this problem, we obtained the equations of the statics of the heat exchanger with regard to the adjustable insert, the dynamic model of the heat ex-changer taking into account this insert. The novelty of the work is control laws of an adjusta-ble heat-conducting insert between the primary and secondary coolants of the heat exchanger, which allow compensating the main disturbances, which influence the heat exchanger. A method has been developed for solving differential-integral equations of heat exchanger stat-ics with an insert (HEI), which allowed analytically expressing the ratio of average integral heat carrier temperatures in a heat exchanger depending on the heat exchanger length, which allows building a control system for a heat exchanger with a variable heat exchange surface area. |
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Cuvinte-cheie heat exchanger, variable heat transfer surface, Control system, mathematic model, heat pump., schimbătorul de căldură, suprafața variabilă de schimb de căldură, sistemul de diriajre, modelul matematic, diriajre., теплообменник, переменная площадь поверхности теплообмена, система управления, математическая модель, тепловой насос. |
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