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Discharge measurement and performance tests of hydraulic units in low-head small hydropower installations

Steller J., Adamkowski A., Henke A., Janicki W., Kaniecki M., Krzemianowski Z.

Transactions of the Institute of Fluid-Flow Machinery

2015

nr 130

3--29

In course of over half a century the test teams of the Szewalski Institute of Fluid-Flow Machinery (IMP PAN) have conducted numerous performance tests of small hydropower (SHP) installations on various occasions and motivations, including updating or establishing performance characteristics of old machines, acceptance of new units, checking or optimising the cam correlation of new or refurbished double-regulated turbines, checking performance of prototype turbines under field conditions. The discharge measurement techniques have included currentmeter, pressure-time and acoustic methods. Index tests, using the Winter-Kennedy and other differential pressure methods, as well as current-meter and acoustic techniques, have been employed quite frequently to optimise the cam curves of double-regulated machines. In one case a simplified technique based solely on the power/wicket gate opening relationship was checked. This paper discusses some techniques applied when determining the absolute efficiency and optimizing cam correlations by means of absolute and index test methods. Cubic spline formulae as applied to integrate the flow velocity field in a hydrometric section are derived. Results of a discharge measurement by means of the current-meter and pressure-time method are compared as a special case study. Finally, practical recommendations addressed both to the power plant owners and the test team members are formulated.

Radiacyjna inżynieria biomedyczna

Rosiak J. M., Czechowska-Biskup R., Filipczak K., Henke A., Kadłubowski S., Kozicki M., Ulański P.

Postępy Techniki Jądrowej

2004

z. 1

2-15

New aspects of corrosion protection of aluminium

Maege I., Jaehne E., Henke A., Adler H-J.

Zeszyty Naukowe. Chemia / Politechnika Śląska

1999

z. 140

29-40

The self-assembly process has been investigated for replacement of the present chromating procedure on reactive metals like aluminium and to improve the lacquer adhesion and corrosion inhibition. It will be shown, that self-assembled layers can affect adhesion and corrosion inhibition on aluminium and its alloys. For SAMs (self-assembly molecules) substances are required which are able to react spontaneously on the surface for which terminated alkyl-phosphonic and phosphoric acid monoalkyl esters have been synthesised. As a result of these successful investigation new reactive polymer dispersions with adhesive groups on the shell have been synthesised, which are also able to react with the metal surfaces resulting in a very good corrosion protection after the coatings.

Badano proces samoorganizacji w celu zastąpienia obecnych procesów chromatowania metali reaktywnych, jak glin, i poprawy adhezji lakierów oraz inhibitowania korozji. Zostanie wykazane, że samoorganizujące się warstwy wywierają wpływ na adhezję lakierów i inhibicję korozji glinu i jego stopów. Dla samoorganizujących się warstw konieczne są cząsteczki, zdolne do spontanicznej reakcji z powierzchnią. Syntetyzowano dla tego celu monoalkilowe estry kwasów fosfoniowych i fosforowych. Otrzymano nowe reaktywne dyspersje polimerowe z grupami adhezyjnymi, zdolnymi do reakcji z powierzchnią metali, zapewniające bardzo dobrą ochronę przed korozją po pokryciu powłoką.