Numerical Simulation of a Hybrid CSP/Biomass 5 MWel Power Plant

• Type: Article in International Conference Proceedings Book
• Date: 2017-06-01

Authors

João Soares (Author) FEUP; Armando C. Oliveira (Author) FEUP

Conference proceedings International

Title: INTERNATIONAL CONFERENCE ON CONCENTRATING SOLAR POWER AND CHEMICAL ENERGY SYSTEMS (SOLARPACES 2016)

22nd International Conference on Concentrating Solar Power and Chemical Energy Systems (SOLARPACES)

Masdar Inst Sci & Technol, Abu Dhabi, U ARAB EMIRATES, OCT 11-14, 2016

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Scientific classification

CORDIS: Technological sciences > Engineering

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-00N-BMD

DOI: 10.1063/1.4984488

Abstract (EN): The fundamental benefit of using renewable energy systems is undeniable since they rely on a source that will not run out. Nevertheless, they strongly depend on meteorological conditions (solar, wind, etc.), leading to uncertainty of instantaneous energy supply and consequently to grid connection issues. An interesting concept is renewable hybridisation. This consists in the strategic combination of different renewable sources in the power generation portfolio by taking advantage of each technology. Hybridisation of concentrating solar power with biomass denotes a powerful way of assuring system stability and reliability. The main advantage is dispatchability through the whole extent of the operating range. Regarding concentrating solar power heat transfer fluid, direct steam generation is one of the most interesting concepts. Nevertheless, it presents itself technical challenges that are mostly related to the two-phase fluid flow in horizontal pipes, as well as the design of an energy storage system. Also, the use of reheat within the turbine is usually indirectly addressed, hindering system efficiency. These challenges can be addressed through hybridisation with biomass. In this paper, a hybrid renewable electricity generation system is presented. The system relies on a combination of solar and biomass sources to drive a 5 MWel steam turbine. System performance is analysed through numerical simulation using Ebsilon professional software. The use of direct reheat in the turbine is addressed. Results show that hybridisation results in an enhancement of system dispatchability and generation stability. Furthermore, hybridisation enhanced the annual solar field and power block efficiencies, and thus the system annual efficiency (from 7.6% to 20%). The use of direct reheat eliminates steam wetness in the last turbine stage and also improves system efficiency.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7