PREDICTION OF THE INTENSITY OF HEAT RELEASE IN SUBSTRATES OF BIOGAS TECHNOLOGY

Authors

Keywords:

regular thermal regime, biogas, substrate, biogas installation, thermal stabilization, thermophysical properties, experimental and calculation method, mathematical model.

Abstract

For our country, the development of energy saving and environmental protection technologies is at the development stage, therefore there is a need for an economically profitable determination of the intensity of heat exchange in a multi-phase multi-component environment, as there is a question in the production of energy-saving thermal power equipment.

The paper considers the heat exchange of the substrate from the operating biogas plant. In general, substrates consist of three phases, namely liquid (water and solution), solid (vegetable impurities, leaves, animal manure) and gas (biogas bubbles). The presence of various impurities in the mixture can change its rheological properties depending on the nature of the substrate and its context. In biogas technologies, different substrates have different thermophysical properties. The greatest difficulty is the measurement of thermal conductivity, other thermophysical properties can be estimated using existing methods.

To use the given method for predicting the intensity of heat transfer in substrates of biogas technology, the authors have accumulated observations and experimental results on an experimental stand on liquids with known thermophysical properties.

In biogas technologies, there is a problem of determining the intensity of heat exchange in multi-phase and multi-component environments, when solving it, it is advisable to use the theory of a regular thermal regime.

 On the presented experimental stand, an array of information on "model fluids" with known information on thermophysical properties was obtained, on the basis of which the dependence on heat exchange is derived in a criterion form.

In the case under consideration, only a sample of a multiphase liquid medium, the thermophysical properties of which are limited, appears as initial data, only fragments of information can be found in the literature.

In the paper, only general recommendations are given regarding the determination of the intensity of heat exchange.

References

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Published

2023-09-18

Issue

Section

ENERGY EFFICIENCY AND ENERGY SAVINGS