Оптимізація теплового режиму біогазової установки на базі поліфункціонального електромеханічного перетворювача

М. М. Заблодський, П. Б. Клендій, О. П. Дудар, Г. Я. Клендій

Анотація


OPTIMIZATION OF HEAT MODE OF BIOGAS ON THE BASIS OF POLYFUNCTIONAL ELECTROMECHANICAL CONVERTER

N. N. Zablodskyy, P. B. Klendiy, H. Y. Klendiy, O. P. Dudar

Biogas plants provide processing organic waste (drains of livestock and crop production) and precipitations of drain water into biogas (fuel gas). Along with Biogas facilities produce highly efficient expensive liquid organic fertilizer. Methane bacteria evince their vital activity at a temperature of 0-70˚ C

The rate of the fermentation process is highly dependent on temperature. Fundamentally is the rule: the higher the temperature, the faster the resolution and  the higher gas production

To ensure the most out of biogas and getting quality without pathogenic microflora, worms, their eggs and weed seeds, organic fertilizer in biogas plant must be maintained optimal temperature mode that is – an important factor in the process of fermentation.

To consider with optimization process converting organic waste for getting separate biogas three temperature modes:

1)               Psychrophilic- up to 20-25 ˚C ;

2)               Mesophilic – 25-40˚C;

3)               Thermophilic – more than 40˚;

Mesophilic and thermophilic processes require are sent an external heat source and strict control of temperature.

Requirements to limits variations in temperature for optimal gas production the rigid the higher temperature of the fermentation process: at psychrophilic temperature range 2˚C per hour; mesophilic 1˚C per hour; thermophilic 0.5˚C per hour.

Methanogenesis optimum temperature depends on the type of processed plant material – organic waste.

The energy needed for fermentation process is spent on heating the substrate from temperature supplied to the reactor liquid manure to the fermentation temperature, as well compensation for losses caused by radiation and conduction. The heat required to heat supply, which is loaded into the reactor to process temperature depends on the mass of the substrate, its average specific heat capacity the temperature difference between process and temperature that is loaded.

In all cases, the use of effective insulation can reduce a few percent of the energy demand heat loss thermal conduction the rest compensator for account of heat of foreign energy sources, namely:

-                    Part of formed biogas can be directly burned in gas boiler for heating water that is passed through a heat exchanger;

-                    Electric boiler used to heat the reactor .

Heating biogas plants can be made on the basis of polyfunctional electromechanical converter. When one device serves as source of mechanical and thermal energy that heats and roll the water through a heat exchanger of biogas plant.

The effect of energy saving systems formed by using part of dissipative energy reduction rate of speed and fold amplification moment due to modular formation of mechanical properties .

Effective structure of pemp as a heat exchange system with internal sources of heat, if all energy destined for the converter function is achieved with the maximum ceiling for temperature-enthalpy plane components of curves “cold” and “hot” flow and the  economically expedient convergence (pinch-principle).

Equity distribution of electromagnetic energy flows in two useful power is carried out according to the value of the current slide, which is based on the ratio of electromagnetic propulsion points engine  (DM) and inhibitory (TM) module is set at a level which provides the necessary technological mode for the useful mechanical and thermal power:

The second most important is principle of heat dissipative component integration flow of compound energy. The integration of thermal processes is forming a heat capacity of selection of units pemp dissipation and direction of coordination heat flow to areas of the technological range, which actually is required heating of working surfaces and volumes.

 

 

 


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Посилання


Biogazovyye ustanovki. Prakticheskoye posobiye [Biogas installation. Practical textbook]. Available at: http://zorgbiogas.ru /upload/pdf/Biogas_plants_Practics.pdf.

Pavliskyi, V. M. Podobailo, V. H., Potapenko, M. V. (2008). Udoskonalennia systemy ekspluatatsii elektrotermichnoho obladnannia biohazovykh ustanovok [Improving the operation of biogas plants electrothermal equipment]. Visnyk Ternopilskoho derzhavnoho tekhnichnoho universytetu, 13 (3),. 144 – 148.

Podobailo, V. H., Potapenko, M. V., Semenova, N. P. (2014). Pidvyshchennia enerhoefektyvnosti biohazovykh ustanovok [Improving the energy efficiency of biogas plants]. Visnyk Kharkivskoho natsionalnoho tekhnichnoho universytetu silskoho hospodarstva imeni Petra Vasylenka, 153, 93-95.

Zablodskiy, N. N. (2008). Polifunktsional’nyye elektromekhanicheskiy preobrazovateli tekhnologicheskogo naznacheniya: Monografiya [Polyfunctional elektromechanical converter tehnological purpose: monograph]. Alchevsk, DonGTU, 295.

Zablodskiy, N. N. (2007). Modifitsirovannyy metod ekvivalentnykh teplovykh skhem dlya analiza protsessov v elektroteplomekhanicheskikh preobrazovatelyakh [Modify method equivalent thermal circuits for analysis of processes in elektromechanical converter]. Vіsnik Kremenchuts’kogo derzhavnogo polіtekhnіchnogo unіversitetu іmenі Mikhayla Ostrograds’kogo: Naukovі pratsі KPDU. Kremenchuk, 3/2007 (44), Ch. 1, 121-124.


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