Design and characterisation of a bi-modal solar thermal propulsion and power system for small satellites. (5th May 2021)

• Record Type: Journal Article
• Authors: Leverone, Fiona; Cervone, Angelo; Pini, Matteo; Gill, Eberhard
• Is Part Of: Applied thermal engineering. Volume 189(2021)
• Publication Date: 2021-05-05
• Subjects: Mini-satellites -- Solar concentration -- Ultra-high temperatures -- Silicon phase change material; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2021.116609
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Feasibility of an integrated propulsion and power system for small satellites. Details of the bi-modal system design process are provided. Investigates the critical heat flux of the propellant. Transient analysis of a high-temperature energy storage system. Abstract: Small satellites with increased capabilities in terms of power and propulsion are being demanded for future missions. This paper addresses an alternative bi-modal solution which consists of a solar thermal propulsion system coupled with a micro-Organic Rankine Cycle system, to co-generate thrust and electrical power. Current literature on bi-modal systems is limited to static power conversion systems such as thermionic conversion processes. Therefore, this paper expands the research of bi-modal systems to dynamic power conversion systems and latent heat storage systems. The paper documents the design process, key design parameters, and feasibility of this system for a Geostationary Transfer Orbit to Lunar Orbit insertion mission. The results of a single-objective optimisation show the system is most suitable on-board small satellites with a gross mass above 300 kg. The propellant accounts for 50% of the total system mass. The final design uses Silicon as the latent heat energy storage system due to its high specific energy of more than 250 Wh/kg. Additionally, the enthalpy method is used to describe the dynamic behaviour of the phase change material and results show the insulation thermal conductivity has the largest effect, up to 17%, on the receiver's maximum achievable steady-state temperature.