TY - JOUR T1 - Termodynamika piestového parného stroja A1 - Kováč, Vladimír A1 - Štubňa, Igor JA - Obzory matematiky, fyziky a informatiky Y1 - 2006 VL - 35 IS - 3 SP - 36 EP - 42 SN - 1335-4981 N2 - The paper deals with the first steam engine invented by D. Papin. For instruction purpose, the engine was improved with the valve. Description of the principle and operation of these engines is shown as well as derivating the efficiency of the improved engine. ER -