Dynamic Stability Analysis of the Hybrid System Designed for Ocean Thermal Energy Conversion and Thermal Power Plant

Oceanic Thermal Energy Conversion (OTEC) is a method for generating electricity by taking advantage of the small temperature difference between warm surface water and cold deep ocean water. In the present research, we have studied and assessed dynamic stability and performance simulation of an OTEC power plant whose thermal efficiency has been improved by absorbing the thermal energy of the steam input to the condenser of a thermal power plant which should be discharged through cooling water. The mathematic models of the system have been developed based on its thermodynamic properties as well as on the structure of its power cycle so that it has become possible to carry out dynamic simulation and assessment on the system. The proposed systems are potentially able to increase the net thermal efficiency, and at the same time, reduce the thermal pollution created. Dynamic equations of the systems under study have been developed in the conditions created by equilibrium between three phases. Transient response of the hybrid system with the thermal power plant to disturbances such as sudden changes in load and short-circuit fault has been evaluated. Results indicate suggest that increase in thermal productivity of the system cause system to have desirable steady state and transient performance.