News

Aalto-China collaboration resulted in a novel 2-stage dish solar concentrator

Aalto University New Energy Technologies Group and Southeast University's Key Laboratory of Solar Energy Science and Technology have developed a novel solar concentrator for central solar power plants.
Figure. Solar irradiance distribution at focal point of the new concentrator.

Here we propose a novel 2-stage dish concentrator system for concentrating solar power plants based on the so-called overlap method, which improves both the radial flux concentration ratio (b) and the intercept factor (g) of the concentrator. The 2-stage dish is composed of paraboloid primary and hyperboloid secondary mirrors having a special hollow structure enabling the mirrors to overlap, but avoiding excess shading. Geometric and optical analyses with ray-tracing show maximum values ofconcentration ratio15,498 and  intercept factor 0.78. Also, the size of the focal spot could be reduced. The concept is applicable for solar tower concepts enabling more compact unit mirrors and reducing the receiver size. The results were recently presented in a journal article:  Jun Wang , Song Yang , Chuan Jiang , Qianwen Yan , Peter D. Lund: A novel 2-stage dish concentrator with improved optical performance for concentrating solar power plants. Renewable Energyy 108 (2017) 92-97. http://dx.doi.org/10.1016/j.renene.2017.02.059 

  • Published:
  • Updated:
Share
URL copied!

Related news

Cooperation Published:

JobTeaser replaced Aalto CareerWeb

Aalto JobTeaser is now the channel to promote jobs, internships, career events and advices for Aalto students.
Violetti Unifi-banneri, jossa kuvattu numeroita, joiden päällä erilaisia graafisia kuvia, esim. avain ja suurennuslasi
Cooperation Published:

Universities published 12 ambitious theses and intend to become leaders in sustainable development

The thesis package contains extensive recommendations for measures to be taken in teaching, research, administration, societal impact and funding model of universities.
Banner image for Matchbox event with a black background and orange illustrations of matches
Cooperation, Studies Published:

AVP brings together students, VC's and companies in an all-new event

In Matchbox, students, investors and industry experts will get a chance to connect with each other through e-pitching and networking.
Kuvassa taideinstallaatio SOONI vaaleassa aulatilassa. Teoksen värikkäät tekstiilit liikkuvat teoksesta kantautuvan äänivirran mukana.
Cooperation Published:

Collaboration with Club For Five gave birth to a sonic installation

What does sound look like? How does art sound like? The art installation SOONI examines connections between sound and matter and their impact on well-being.