Investigating the dynamic mode of a heating system operation

Summary

Main specifications of the hydraulic mode of the advanced heating systems are given. The standard hydraulic calculation does not provide for the complete amount of information on the heating system operation. Accordingly a mathematic instrument (software-model) was developed to calculate a hydraulic circuit of an advanced heating system in a transit mode of operation. Hydraulic calculations of the two heating systems of similar structure, however, equipped with different balancing fittings were carried out. Typical tendencies of the system active elements operation were analyzed. Recommendations on specific use of the control valves were formulated.

Key words

flow rate , pressure drop , hydraulic condition , heating system , resistance characteristic , thermostatic control valve , balancing valve

Improvement of Energy Efficiency of Pipeline Systems of a Building

Summary

Problems of the power saving in construction can be solved by means of reducing heat losses through the enclosing structures, installing heat and water meters, using nontraditional sources of heat supply et al. Issues of energy saving in pipeline engineering systems in the course of designing are not studied enough while a considerable part of power consumption by the systems of engineering support of buildings (up to 80%) falls on the drives of pumps and ventilators of pipeline networks: heating, water supply, ventilation, and air conditioning. Economic indexes are considered as criteria of energy efficiency of pipeline networks. The method of reduced expenditures is used for calculations.

Key words

energy efficiency , power consumption , heating system , ventilation system , reduced expenditures , rate of working medium movement

Heat Accumulating Systems in Heat Supply of Private Dwelling Houses

Summary

An innovation design of a heat accumulator differing qualitatively from known domestic and foreign analogues has been developed. The principle of operation of the heat accumulator is based on a phase transition (solid substance – liquid) of a heat accumulating material – paraffin. Paraffin heat accumulators can be used in the systems of heat supply, heating and hot water supply of private dwelling houses and small blocks of flats. Owing to the high effective design and up-to-date materials the heat accumulator can reduce significantly expenditure of heat and electric energy. In many cases heat accumulating electric systems of the heat supply can prove to be economically attractive.

Key words

hot water supply system , heating system , regulating device , heat accumulator , phase transition