Кафедра "Технологія машинобудування та металорізальні верстати"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/3960

Офіційний сайт кафедри http://web.kpi.kharkov.ua/tmms

Кафедра "Технологія машинобудування та металорізальні верстати" заснована в 1934 році. Першим завідувачем кафедри був доцент Ф. К. Корольов – фахівець в області металорізальних верстатів, який беззмінно керував колективом до 1966 року і суттєво вплинув на розвиток кафедри.

Кафедра входить до складу Навчально-наукового інституту механічної інженерії і транспорту Національного технічного університету "Харківський політехнічний інститут".

У складі науково-педагогічного колективу кафедри працюють: 5 докторів технічних наук, 6 кандидатів технічних наук; 5 співробітників мають звання професора, 6 – доцента.

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Фільтри

2016 - 20183

Налаштування

Містить файли: ТакORCID: search.filters.orcid.https://orcid.org/0000-0003-2944-5110

Результати пошуку

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  • Ескіз
    Документ
    Анализ энергоэффективности и модернизация системы установленных теплообменников
    (Ліра, 2016) Бабак, Татьяна Геннадиевна; Хавин, Геннадий Львович
    Рассмотрена задача реконструкции системы установленных пластинчатых подогревателей. Показано, что для корректного решения задачи необходимо провести анализ энергоэффективности всей системы выпарной станции в целом, который реализован методом пинч-анализа
  • Ескіз
    Документ
    The innvestigation of the process streams integration in the multi­effect evaporation plant for the concentration of sorghum syrup
    (Технологический центр, 2018) Babak, Tatyana; Golubkina, Olga; Ponomarenko, Yevgeniya; Solovey, Ludmila; Khavin, G. L.
    The study on the integration of heat streams of the evaporation station for sorghum syrup concentrating is presented. The relevance of the research is is why the research, aimed at reducing the consumption of external energy and enhancing operating efficiency, is relevant and has practical value. The main purpose of the work is to create a scientifically substantiated design with enhanced economic indicators of operation, ensuring saving in consumption of hot utility (steam) and cooling water. The problem was solved using the pinch-analysis. Heat streams, requiring heating and cooling, were identified, and the alternative project based on the selection of the value of minimum temperature difference ΔTmin, was created. This value was calculated and substantiated based on the data on thermal streams. The stream of condensate of return steam, the heat excess of which had not been used so far, was added to the system. For the alternative project, the layout of heat exchange equipment was proposed, calculation of plate heat exchangers was performed. The designed network of heat exchangers made it possible to decrease the annual steam consumption by 18 %. Cost-effectiveness analysis was conducted by comparing the indicators for two of the projects of the syrup preheating department for the evaporation station. The proposed alternative project saves power consumption of cooling water by 35.9 kW, of heating vapor steam – by 60.5 kW. At the interest rate of profit tax of 18 %, implementation of the alternative project will pay off in 4 months. As a result, net annual gain of an enterprise is planned to increase by 16 %, at virtually the same payback period of the projects. Application of the methods of heat streams integration made it possible to develop an effective project of sorghum syrup preheating before evaporation and ensure saving of external utilities.
  • Ескіз
    Документ
    Advantages of using channels with different corrugation height in the plate heat exchangers
    (Технологический центр, 2018) Khavin, G. L.; Babak, Tatyana
    In the case when there is a difference in consumption on the side of the cold and hot heat carriers, the use of channels with the same corrugation height in one heat exchanger leads to a decrease in velocity of the heat carrier on the side with low consumption. Low velocity contributes to appearance of deposits on the heat transfer surface, which leads to disruption of operation mode of the apparatus and a forced clean-up stop. In case of using channels with a different corrugation height (cross-section area), velocities in the channels are aligned and intensity of emergence and growth of contamination falls sharply. It also allows us to reduce the heat transfer surface area of the apparatus and fully implement permissible pressure losses on the sides of the heat exchanger. For designing of heat exchangers of this structure, the authors developed the mathematical model that allows making calculations of heat exchangers for assigned operation conditions with the use of geometrical data of the plates, thermophysical properties of heat carriers and criterial equations for plates of the selected type. The calculation algorithm involves determining of the ratio between corrugation heights. Practical value lies in the fact that the proposed approach makes it possible to extend the service life of the heat exchanger prior to a maintenance stop. This enables provision of continuity of the technological process and decreases operation costs. Calculation of the heat exchanger of hot water supply by the parallel scheme of attachment to heating networks and the heat exchanger of stage 1 of the two-stage hybrid scheme was presented. Calculation data indicate a decrease in the heat transfer surface area compared to heat exchangers with channels of equal height, full realization of pressure losses and their alignment in the channels, which facilitates an increase in resistance to contamination of the plates’ surface. Calculation showed the advantage of using apparatuses with channels of different cross-section area. The higher the ratio between consumption of heat carriers in the channels, the stronger this advantage.