Economic Analysis of Vacuum Transfer Tube for Conveying Working Medium of CSP

Abstract

Parabolic trough solar thermal power generation system has long distance transfer pipes for the heat transfer fluid (HTF), causing large heat losses, and which requires a lot of energy for thermal protection. To improve piping insulation effect and reduce the heat losses, Hubei Salnner Vacuum Science & Technology Co., Ltd has designed and developed a suitable vacuum transfer tube for the HTF of solar thermal power generation system, which can reduce heat losses effectively. Taking the vacuum transfer tube as the object, this paper established the heat loss model of the vacuum transfer tube, and also proposed the model of the time sample under the unit's operating conditions according to the actual weather conditions in typical years of a 50MW parabolic trough solar thermal power plant construction site. On above basis, according to the structure of the power plant system and the operating conditions, this paper took intensive research on the cost and economy of the parabolic trough solar thermal power generation system which uses the vacuum transfer tube, and the results showed that vacuum transfer tube for convering working medium of CSP has good economical benefits.