Implementation of condensing economizers for small boilers

Abstract

Reducing the dangerous potential of global warming and its impact on climate change requires reducing carbon dioxide emissions into the atmosphere, which is inextricably linked to reducing the burning of fossil fuels. There are various techniques to accomplish this task. One of such technologies is the maximum use of excess heat of exhaust gases with the subsequent condensation of vapors contained in them and use of the obtained heat for own needs of the heat energy source. Because there are many designs, it is necessary to carry out various studies to determine the optimal design of these apparatuses. In order to fulfil this work, we have made a laboratory model of a condensing economizer with a developed heat exchange surface. We also carried out a series of tests to construct graphical dependences of experimental data, which will help us to determine the heat transfer coefficient from flue gases to water taking into account the condensation of water vapors and to calculate the optimal geometry of channels for the flow of different heat carriers. All these studies will allow us to obtain the optimal design of condensing economizer.

Keywords

• phase transition heat exchanger
• energy and mass transfer
• heat of phase transition
• ribbed surface geometry
• atmospheric boiler
• aluminium heat panels
• counter flow of flue gases