Calculation methods based on moderate volume methods (CFD method) have been shown to be very useful in increasing (efficiency, extraction) of wood burning heat sources. Such heat sources include hot water gas boilers for combustion of dry wood. One of the most important parts of the whole process of converting the basic energy contained in fuel to heat transfer to the carrier is gasification of the oil in the feed chamber and subsequent combustion of wood gas.
The paper presents CFD simulation of wood gasification process in the filling chamber and subsequent burning of wood gas on a model heat source. As a model heat source, a low-temperature hot water boiler with flue gas-water tubular heat exchanger has been selected. It is a hot water gas boiler for the burning of dry wood. The interior of the boiler consists of a filling room where the fuel is dried and mixed. The wood gas then passes through a pipe into the burning chamber, where it burns with the help of a second ventilator. Flue gases transfer their heat to a heat exchanger through the walls of water pipes.
In this article we look at the major problems facing mankind, related to the production, conversion and use of energy and oil resources. With the aim of saving fuel and improving the environmental safety of various consumer heating systems, it is proposed to use separate heat-insulating systems by installing hot water boilers in the heat source. Verification of the use of these heating systems is done. Considering the design, the importance of use, the design features and the principle of action of a fuel-efficient hot water boiler, developed by staff at Belgorod State Technological University named after V.G. Proposed to be installed as a heat generator in the heat sources of independent heating systems. Consideration is given to the construction of the various units of the proposed boiler and the terms of use of the variations of a particular design.
Also, the advantages and disadvantages of various versions of the boiler design and its main components were carefully examined, comparisons were made and the advantages of these or other types of design in front of others different conditions were demonstrated.
Analysis was performed on the failure and closure of cold and hot boiler tubes with chemical analysis of fossils, metallographic tests, XRD studies, SEM and EDX. The mechanism of action, storage, and chemical composition of the water supply were also tested. It concludes that improper storage and chemical water supply are the main causes of failure, leading to a variety of corrosion mechanisms, identified and discussed in this study.
A heat pump that uses wastewater drained from a regular bathroom at the SPA facility as a heat source is built. In this article, the estimated field performance of the wastewater source heat pump is reported. Data-based analysis of field collected under various operating conditions is included. It was shown that the temperature of the wastewater was significantly affected by the evaporation temperature and the coefficient of operation of the wastewater heat source. Rotating the wastewater from the bottom to the top of the wastewater tank can weaken and even remove the precise temperature of the wastewater inside the wastewater tank and improve the operational coefficient and pressure to absorb the compressor heat source water efficiently.
The daily average coefficient of operation of the wastewater heat pump has been monitored for more than a month. It was shown that the estimated operating coefficient gradually decreased, raising the need for regular cleaning of the heat exchangers used in the heat pump system of the wastewater source. In addition, the recorded maximum transporting capacity of the wastewater pipe reduced by 16.9% over the 1 month operation and by 20.1% after ∼5 months due to the bio-fouling build-up. Finally, an analysis is presented comparing the economics of using a hot water heat pump system with that of conventional heating systems.
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