A transient model for the heat exchange in a solar thermal once through cavity receiver

作者：Zapata Jose I^*; Pye John; Lovegrove Keith

来源：Solar Energy, 2013, 93: 280-293.

DOI：10.1016/j.solener.2013.04.005

• Direct steam generation
• Transient two-phase flow modelling
• Concentrating solar thermal power
• Moving boundary formulation

This paper presents a dynamic model of a once-through-to-superheat solar steam receiver for electricity generation. The receiver is a mono-tube cavity boiler mounted at the focal point of a 500 m(2) paraboloidal dish concentrator at the Australian National University. The dynamic model is derived from physical principles of mass and energy conservation, and uses a moving boundary formulation, coupled with a switching approach, to represent outlet flow, ranging from sub-cooled liquid to superheated steam. A method to compute outlet mass flow rate for all three receiver outlet flow conditions is included. This modelling approach results in a compact state-space representation of the receiver which is useful in the development of model-based control strategies for the operation of the receiver in a concentrator plant. The model is implemented in TRNSYS 16 and validated with experimental data from the Australian National University 500 m(2) dish system.

• 出版日期2013-7