Rain Water as a Factor of Enhancement of Power Efficiency of Heat Pumps

Summary

A scheme of the use of a heat pump with an underground collector damped with rainfall with the help of a special system is developed. The enhancement of power efficiency and a coefficient of weekly output of heat pumps due to purposeful flushing of underground collectors without additional auxiliary power is proved. When using the flat collector with a flushing system the expenditures for operation and maintenance of a heat pump of water-brine type go down from 735 to 688 Euro per year. Capacity of heat extraction is increased with the help of wetting of squashy ground from 10 to 30 Wt/m² aproximately.

Key words

energy efficiency , underground collector , damping , rain water , heat pump , natural energy , coefficient of output

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UDC

Shibaev S.

Protection of Concrete Surfaces Having the Constant Contact with Water

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UDC 628.345.1.001.2

Getmantsev S. V., Gandurina L. V., Sychev A. V.

**Research in Coagulation Properties of AQUA-AURAT™18 and Aluminium Sulphate at Independent and Combined Application**

Summary

Results of the experimental studies on coagulation of pollutants of various types (suspended substances, dyes and humic substances) with coagulant AQUA-AURAT™18 and aluminium sulphate at combined application depending on their ratio and order of insertion in comparison with composite coagulant AQUA-AURAT™105 are presented. It is shown, that the combined use of aluminium sulphate and AQUA-AURAT™18 at consecutive insertion or in the form of composition intensifies the process of water treatment for suspended and dissolved acid substances (humates and acid dyes) comparing with the independent use of coagulants at a lesser or equal dose. The composite coagulant AQUA-AURAT™105 is more efficient for removal of suspended substances from wastewater than dissolved organic pollutants of acid type.

Key words

suspended substances , coagulation , coagulant , water treatment , humic substances , dye

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UDC