Spatial Cycle Heating and Its PLC Control for Furnace

Abstract

Aim at lower heating efficiency problem of furnace, the spatial cycle heating principle was brought forward and the testifying device was designed and fabricated. After the traditional heating principle was abstracted, modeled, narrated and analyzed, the obvious defect of lower heating efficiency was pointed out and analyzed in theory. The spatial cycle heating model was put forward to improve heating efficiency. And then different expressions aim at given models were deduced and compared. In theory, it was gained that the spatial cycle heating mode had a higher heating efficiency than traditional heating mode. Then a testifying experiment device was designed and constructed in terms of spatial cycle heating principle. PLC controller was employed to realize the closed-loop feedback control. Water temperature was the output of PLC control system. Temperature sensor was used to sample output and then to feedback to PLC controller. Heating resistors were considered as actuators. Furthermore, touch screen was also employed to control PLC controller and to dynamically display the water temperature. Experiment and its analytic results well demonstrated that the spatial cycle heating model could further improve the heating efficiency. Namely, spatial cycle heating principle is correct and effective and available for improving heating efficiency in furnace. It is very suitable for massive heating case such as winter heating.