Abstract

An unconventional CHP unit with a hot air engine is designed as the primary energy source with fuel in the form of biomass. The heat source is a furnace designed for combustion of biomass, whether in the form of wood logs or pellets. The transport of energy generated by the biomass combustion to the working medium of a hot-air engine is ensured by a special heat exchanger connected to this resource. The correct operation of the hot-air engine is largely dependent on an appropriate design of the exchanger. The paper deals with the calculation of the heat exchanger for the applications<br />mentioned, using criterion equations, and based on CFD simulations.

Highlights

  • The burning of fossil fuels in internal combustion engines, in gas turbines, in steam power plants and in other facilities represent various possibilities of electricity production

  • [1] In the Ericsson cycle, air is compressed in the compression cylinder, it flows through the heat exchanger, where the air receives heat energy at a fixed pressure

  • The transport of energy generated by the combustion of biomass to the working medium of the engine is provided by a heat exchanger connected to that source

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Summary

Introduction

The burning of fossil fuels in internal combustion engines, in gas turbines, in steam power plants and in other facilities represent various possibilities of electricity production. Namely the Stirling and Ericsson engines, offer a possible alternative to conventional internal combustion engines This enables us to refund the energy supplied to the internal exchanger of the engine. The energy from the combustion of natural gas was replaced with the energy of the working medium, obtained and heated from biomass combustion With such an involvement it was necessary to ensure the delivery of the working fluid from the heat exchanger to the regenerator chamber of the Stirling engine. Delivering the medium by a blower or compressor was chosen as the best solution

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