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Abstract
The article demonstrates the results of the theoretical research devoted to the study of air flow interaction in hot-air heating systems of automatic modular boilers involving the use of fan heaters. The work quotes the results of mathematic simulation of various density air flows that are vertical to each other.
Highlights
In recent times, a great attention has been paid to energy-saving issues in various production spheres
The use of water fan heater-based hot-air heating in automatic modular boilers is one of the efficient solutions of the air thermal conditions issue
If we take the thermal gradient as a quality criteria of the hot and cold air stream mixing, we can assume that the box use in this design allows to increase the fan heater-based heating and ventilation system efficiency by 28.6 % without any maintenance cost increase
Summary
A great attention has been paid to energy-saving issues in various production spheres. The use of water fan heater-based hot-air heating in automatic modular boilers is one of the efficient solutions of the air thermal conditions issue. An incoming stream of the cold outer air is thrown off by the hot air stream from the fan heater and is heated [2] This heating and ventilation system (HV) compared to air handling units is characterized by lower capital and maintenance costs, a higher reliability (warm-air furnace freezing is excluded) and ease of automatic control. Despite its advantages, this system efficiency reduces together with the decrease in the outer air temperature. It is related to a higher flow velocity (1–1.5 m/s) and a different flow density of hot and cold air streams (the cold air density can exceed the hot air density by more than 50 %)
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