. "Tlakov\u00E9 ztr\u00E1ty v okruz\u00EDch s nemrznouc\u00ED sm\u011Bs\u00ED" . "1210-1389" . . . . . . . . "3" . . . "Vyt\u00E1p\u011Bn\u00ED, v\u011Btr\u00E1n\u00ED, instalace" . "Tlakov\u00E9 ztr\u00E1ty v okruz\u00EDch s nemrznouc\u00ED sm\u011Bs\u00ED" . "503939" . "Z(MSM6840770011)" . . "Physica\u016F parameters of non-freeying liquids (mixtures of water and suitable additives with freezing temperature lower than 0\u00B0 C) enlarge the pressure losses in the water circuits and worsen the heat transfer in tubes of heat exchangers. The increase of flow resistance in comparison to water is significant especially at low temperatuires and high concentrations of additives. The article presents the analytical relationship of the density and viscosity in dependence on the additives concentration(propylene glycol)and mixture temperature. The data are applicable to calculations of pressure loses by friction for which the algorithm is pressented. In conclusion, the calculation example and an analysis of the results' sensitivity to deviations of input quantities are also presented."@en . "Tlakov\u00E9 ztr\u00E1ty v okruz\u00EDch s nemrznouc\u00ED sm\u011Bs\u00ED"@cs . "Pressure Losses in Circuits with Non-Freeying Mixtures"@en . "Tlakov\u00E9 ztr\u00E1ty v okruz\u00EDch s nemrznouc\u00ED sm\u011Bs\u00ED"@cs . "RIV/68407700:21220/06:02119719!RIV07-MSM-21220___" . . "Hemzal, Karel" . "friction; glycol; non-freezing mixture; pressure drop; pressure losses; propylene glycol"@en . "2"^^ . "1"^^ . . "Fyzik\u00E1ln\u00ED veli\u010Diny nemrznouc\u00EDch sm\u011Bs\u00ED kapalin (sm\u011Bs\u00ED vody a vhodn\u00E9 p\u0159\u00EDm\u011Bsi, kter\u00E9 maj\u00ED ni\u017E\u0161\u00ED teplotu tuhnut\u00ED ne\u017E 0\u00B0) zv\u011Bt\u0161uj\u00ED tlakov\u00E9 ztr\u00FDty ve vodn\u00EDch okruz\u00EDch a zhor\u0161uj\u00ED p\u0159estup tepla v trubk\u00E1ch v\u00FDm\u011Bn\u00EDk\u016F.V\u00FDznamn\u00E9 je zv\u00FD\u0161en\u00ED odporu proud\u011Bn\u00ED vzhledem k vod\u011B zejm\u00E9na p\u0159i n\u00EDzk\u00FDch teplot\u00E1ch a p\u0159i vysok\u00FDch koncentrac\u00EDch p\u0159\u00EDm\u011Bs\u00ED. V p\u0159\u00EDsp\u011Bvku jsou uvedena analytick\u00E1 vyj\u00E1d\u0159en\u00ED hustoty a viskozity na koncentraci p\u0159\u00EDm\u011Bsi (propylen glukolu) a na teplot\u011B sm\u011Bsi. \u00DAdaje jsou pou\u017Eiteln\u00E9 k v\u00FDpo\u010Dt\u016Fm tlakov\u00FDch ztr\u00E1t t\u0159en\u00EDm, pro n\u011B\u017E je uveden algoritmus. P\u0159\u00EDklad v\u00FDpo\u010Dtu a rozbor citlivosti v\u00FDsledk\u016F na odchylky vstupn\u00EDch veli\u010Din jsou uvedeny v z\u00E1v\u011Bru." . . "CZ - \u010Cesk\u00E1 republika" . "21220" . . "Fyzik\u00E1ln\u00ED veli\u010Diny nemrznouc\u00EDch sm\u011Bs\u00ED kapalin (sm\u011Bs\u00ED vody a vhodn\u00E9 p\u0159\u00EDm\u011Bsi, kter\u00E9 maj\u00ED ni\u017E\u0161\u00ED teplotu tuhnut\u00ED ne\u017E 0\u00B0) zv\u011Bt\u0161uj\u00ED tlakov\u00E9 ztr\u00FDty ve vodn\u00EDch okruz\u00EDch a zhor\u0161uj\u00ED p\u0159estup tepla v trubk\u00E1ch v\u00FDm\u011Bn\u00EDk\u016F.V\u00FDznamn\u00E9 je zv\u00FD\u0161en\u00ED odporu proud\u011Bn\u00ED vzhledem k vod\u011B zejm\u00E9na p\u0159i n\u00EDzk\u00FDch teplot\u00E1ch a p\u0159i vysok\u00FDch koncentrac\u00EDch p\u0159\u00EDm\u011Bs\u00ED. V p\u0159\u00EDsp\u011Bvku jsou uvedena analytick\u00E1 vyj\u00E1d\u0159en\u00ED hustoty a viskozity na koncentraci p\u0159\u00EDm\u011Bsi (propylen glukolu) a na teplot\u011B sm\u011Bsi. \u00DAdaje jsou pou\u017Eiteln\u00E9 k v\u00FDpo\u010Dt\u016Fm tlakov\u00FDch ztr\u00E1t t\u0159en\u00EDm, pro n\u011B\u017E je uveden algoritmus. P\u0159\u00EDklad v\u00FDpo\u010Dtu a rozbor citlivosti v\u00FDsledk\u016F na odchylky vstupn\u00EDch veli\u010Din jsou uvedeny v z\u00E1v\u011Bru."@cs . "Pressure Losses in Circuits with Non-Freeying Mixtures"@en . . . "RIV/68407700:21220/06:02119719" . . "4"^^ . "15" . "[6257948BB18F]" . "Lerl, Z." . "139;142" .