- Identification: 103/95/006 - Grant Agency of the Czech Republic
- Duration: 1995 - 1996
- Principal investigator: Ing. Jiří Myška CSc.
Drag reduction in a turbulent flow by means of additives is a phenomenon, which can be used in some technological processes. Usage of additives in district heating systems is an idea not much old. It is based on development and production of drag reducing surfactants, which are effective at high temperatures and also resistant against mechanical straining. Surfactants in heating systems will enable to decrease operating costs (pumping of water) or capital investment costs (tubes and pumps) or to improve the energy capacity of the running system. Research is aimed at rheological properties of surfactants, their dependence on ions present in water, and the influence of salts like sodium salicylate, hydroxinaphtoates and their interchange. The field test with the surfactant in a secondary district heating circuit will be repeated and an evaluation of results is intended to end up with instructions for possible application.
