Solar parabolic dish collector pdf

The controlled feedwater mass flow resembles the shape of the DNI signal, as shown in subplot b. However, the feed-water flow profile is not exactly proportional to DNI due to temperature dependent losses in the receiver cavity. Subplot c shows that the simulated OTSSG outlet temperature rises and is maintained throughout the operation.

OTSSG pressure observes transient change due to phase change process and sudden volume expansion then it is maintained by back pressure valve. This is shown in subplot d. About 1 bar pressure drop is observed in the fluid circuit. Simulation results for a clear sky. Subplot a shows the DNI input. The duration of drop is 60 seconds. The DNI signal with disturbance is shown in Fig. For the disturbances in DNI, the changes in mass flow rate is shown in Fig.

Simulation results for a cloudy sky. Subplot a shows the DNI input with the clouds. The instantaneous feedwater mass flow rate results in slight temperature increase of the outlet steam as shown in Fig. Sudden decrease is mass flow rate results in a decrease in the outlet steam quantity. That results in 1 bar pressure drop from the steady state conditions, as observed in the Fig. It is seen that the SSQCS controller is robust to act against the disturbance and regulate the temperature at the steam outlet.

The proposed scheme consisted of a feedback loop for control of feedwater mass flow in the OTSSG and feed forward control for better disturbance rejection.

PI controllers are proposed in this work. It is tested for reference tracking of temperature set point and also disturbance rejection in simulation.

Data for different DNI and environmental conditions is being recorded and analyzed. It will be presented and discussed as future work. They also acknowledge Komal Sajid, Moneeb Ahsen and Shadab Ahmed for their valuable suggestions and support throughout the course of this work.

Odeh, G. Morrison, and M. Jamil and W. Camacho, F. Rubio, M. Berenguel, and L. Yan, E. Hu, Y. Yang, and R. Valenzuela, E. Zarza, M. Berenguel, and E. Zarza, L. Valenzuela, J. Leon, H. Weyers, M. Eickho, M. Eck, and K. Energy Eng. Lovegrove, G. Burgess, and J. Zapata, Modelling and control of direct steam generation in solar cavity receivers powered by paraboloidal dish concentrators, Ph.

Zapata, J. Pye, and K. Eck and T. Alguacil, C. Prieto, A. Rodriguez, and J. Tharayil and A. CH , Vol. Related Papers Uncertainty and sensitivity analysis for performance of Solar Invictus 53S — A parabolic dish solar collector for direct steam generation By Wajahat Ali. Solar power is a renewable source of electricity that is reliable and cost-effective in every aspect. Different interventions revolve around solar technology.

Solar dish Stirling technology, for instance, is known for its efficiency in the conversation of solar energy into grid-quality electricity. The history of solar dish Stirling technology traces back to about 20 years ago. When talking about solar dish Stirling technology, you will not miss out on a discussion about parabolic dish solar collectors. The question that arises from this is what parabolic dish solar collectors are and how they operate.

A parabolic dish solar collector can be described as a concentrating solar collector that comes in the shape and appearance similar to that of a satellite dish. The difference with the later comes in its form and features. A parabolic dish does have reflectors like mirrors and has an absorber at its focal point.

That is a concentrating solar collector that works by reflecting and focusing the solar energy. It uses the mirror-like reflectors or lenses. Some individuals will refer to it as a point focusing collector or simply a solar dish collector. That is a system that follows the sun across the sky and concentrates its rays onto the receiver. It does that with the use of a computer and the utilization of dual-axis tracking.

Parabolic dish systems are known for their efficiencies in the conversation of solar energy to electricity. That is with the fact that the systems can reach up to degrees Celsius at the receiver but still achieve high-efficiency conversion within a small power capacity range.

Here is a step-by-step process of how it works. The solar energy is then concentrated on the PCU to convert it to grid-quality electricity.

The PCU solar receiver absorbs the incoming solar energy as it works as a heat exchanger. To overcome this problem, all the for the resulting uncertain state space model. In this case of study, we seek to provide a model will be a high-order model, which leads to an suitable framework to design a robust controller which can increased computational cost.

Baseline Control Scheme: Proposition 3. Hereby, achieving the desired Hereby, the PDE model 1 is equivalent to the uncertain objective. In this contribution, we will focus on the control design for By resorting to Lyapunov theory, we can easily reach this our system as a study case.

Thus, we provide some remarks aim. In the following theorem we state the main result. Theorem 4. The time derivative of V t is expressed as follows: Indeed, we can summarize the above discussions in the following proposition.

Simulations are done with real values of process the main contribution of this paper. The other simulation parameters law is applied: are summarized in Tab. Figure 3 illustrates the functioning principle of the zipper controller for a step reference.

The obtained results are illustrated in Then, this system exhibits asymptotic reference tracking. Fig 4. Evolution of the PSC system for a "staircase" and "sinusoidal" references.

A, B represents the reference tracking, and the applied oil flow rate the control input. C, D describes the temperature evolution inside the pipe for both references.

Solar Radiation Profile Fig. This comparison is based on the following this latter. Indeed, we apply the solar radiation profile 5 to performance criteria: the parabolic solar collector in the steady-state.

Tey, S. Mosbah, M. Tadjine, M. Elmetennani, T. As it can be seen the zipper controller presents better [4] J. Wang, H. Wu, H. Conclusion [5] H. Wu, J. Zuniga, I. Queinnec, A. Thereafter, a new controller design Engineering Journal —