Improvement of the water capillary heating system

Purpose of reseach. The article presents the results of a study of a water heating system based on wall units with capillary tubes. This technology is a system in which a heat carrier (water) circulates through multiple capillary tubes that are uniformly embedded in building blocks or panels of walls and ceilings. Such systems are already used not only for heating, but also for cooling rooms, creating a comfortable microclimate. An analysis of studies of similar heating systems was carried out. The main advantage of such systems is their energy efficiency. Capillary systems can reduce the overall consumption of heating systems and, consequently, operating costs. However, at the moment, the introduction and use of units with capillary tubes requires additional research and development, especially in terms of universalizing technological solutions, reducing the cost of materials and simplifying installation. To obtain theoretical results, a model of a capillary system embedded in a wall was constructed. The system has been divided into several sections, which should reduce pressure losses. The hypothesis that capillary heating systems can ensure uniform heat distribution at a relatively low temperature of the coolant has been tested. The paper presents the results of a thermal calculation: a graph of changes in the temperature of the coolant when moving through the system, a graph of changes in pressure in the system, and patterns of temperature changes on the wall surface. The analysis of the data obtained was carried out and conclusions were drawn about the effectiveness and expediency of using such systems. This work can be used for further research of capillary water heating systems. Methods. To build a wall block model and perform thermal calculations, the SolidWorks program and the built-in FlowSimulation tool were used. Results. The study made it possible to obtain the dependences of temperature and pressure changes in the capillary system, as well as the pattern of temperature changes on the wall surface. Conclusion. The results of the study showed that the heating system based on capillary tubes allows for uniform heating of the wall surface, which in turn will allow for uniform heating of the indoor air. This result is achieved at a low temperature of the coolant. In addition, the separation of the system into separate sections proposed by the authors makes it possible to reduce pressure losses.