Pis’mennyi Ye. N.

Experimental samples of flat-oval thermosyphons (TS) with partial transverse rectangular and corrugated finning and samples of round TS with inner intensifiers of heat transfer in evaporation section (ES) were developed and fabricated. They are intended for functioning in heat exchangers (HE) utilizers of heat wastes in ventilation systems. It was shown, that freon R134a is the most optimal heat carrier for TS functioning in conditions close to these in ventilation systems from the point of boiling temperature and safety of application.

The formulation and conduct of this work are due to: 1) unacceptable uncertainty of temperature regimes of fuel elements (fuel rods) of promising reactors in conditions close to the deteriorated heat transfer (DHT); 2) the practical impossibility of studying the temperature regimes of fuel assemblies in real conditions of nuclear reactors (NR); 3) strengthening the priority focus on passive methods of heat dissipation in nuclear energy technologies; 4) the need to increase the efficiency and reliability of promising passive heat dissipation systems of the evaporation- condensation type (ECT

Statement and performance of the research under consideration are substantiated by: (1) vital necessity of support and strengthening of safety barriers in nuclear power engineering by passive methods heat removal; (2) availability of vaporization-and-condensation type (VCT) systems creation for heat removal and thermal shielding; (3) significant limitation of the noted R&D and absence of its implementation in nuclear power technologies; (4) extremely insufficient experimental data base as to core temperature mode in the SCW reactors of a new generation resulting in absence of reliable

Continuous growth in cooling water shortages and increase of environmental requirements through thermal pollution is closely linked with the problem of rational use of water resources and reducing water-intensive technologies. This necessitates the usage of modern energy technologies and their upgrading with help of existing cooling systems in a variety of industries.

Formulation and implementation of this work is stipulated by the necessity of new, more efficient heat transfer means of evaporation-condensation type (ICT) in comparison with the ordinary ICT devices and systems, which improvement has reached the limit of their potential.

Gas turbine unit ( GTU) is the dominant type of drive gas transportation system of Ukraine. However, most of them morally and physically obsolete, leading to a waste of gas for its own needs, which in 2010 amounted to 4.9 billion m3. To improve gas turbine is to use the least expensive stoves (regenerator) for utilization of heat in the turbine exhaust gases at the same time regenerators at current levels of use are bulky often have low operational reliability.

Study and analysis of existing information enabled the development of the construction of a new steel tube equal developed helical type for use as a heat transfer surface air heaters-regenerators for gas compressor units, which are used in compressor stations Ukrainian gas transport system. This surface has several advantages: production with cheaper technology – roller burnishing of circular tube with granular material or liquid for making backpressure inside the tube.