THE INFLUENCE OF TEMPERATURES ON THE STEAM POWER PLANT PROCESS

Zadatak ovog Završnog rada je bio usporediti utjecaj temperature odvođenja topline na toplinski stupanj djelovanja za različite procese parnog postrojenja. Usporedba se vršila između tri kružna procesa sa vodenom parom tj. Carnotovim procesom, Clausius – Rankineovom procesom i Clausius – Rankineovom procesom s pregrijanom parom. Za temperaturu odvođenja topline uzete su slijedeće temperature : 10°C, 20°C, 30°C i 40°C. Za svaki proces i za svaku temperaturu izvršen je termodinamički proračun u kojem je izračunata toplina koju je potrebno dovesti procesu, toplina koja se odvodi, dobiveni rad i na kraju preko dobivenog rada i dovedene topline izračunat je toplinski stupanj djelovanja kojim se definira učinkovitost procesa.Task of this final paper was to compare the influence of heat drainage temperature on the heat level of action for different steam plant processes. The comparasion was made between three circular processes with water vapour, i.e. Carnot process, Clausius – Rankin process and Clausius – Rankin process with overheated steam. The following temperatures were used for the heat drainage temperature: 10°C, 20°C, 30°C and 40°C. For each process and for each temperature, a thermodynamic calculation was made in which the heat to be brought to the process was calculated, the heat to be drained, the work obtained and, finally, through the obtained work and the heat supplied the heat level of action was calculated which defines the efficiency of the process