Matches in SemOpenAlex for { <https://semopenalex.org/work/W1963786602> ?p ?o ?g. }
Showing items 1 to 88 of
88
with 100 items per page.
- W1963786602 endingPage "217" @default.
- W1963786602 startingPage "213" @default.
- W1963786602 abstract "The combination of a stationary parabolic dish concentrator and a heliostat has come to be known as solar furnace. The advantage of this combination as compared to a parabolic dish directly tracking the sun is that the focus is stationary. Both dish and instrumentation of the focus can be placed indoors. In the usual configuration a heliostat is facing a dish of approximately equal area. We have combined a rectangular glass heliostat of area 52 m2 and focal length 100 m with a parabolic dish of area 5.7 m2 and focal length 1.93 m to a two-stage concentrator. In this arrangement the heliostat produces a primary image of the sun at a distance of 100 m to the South. This image has a diameter of roughly 1 m. The bundle of rays contributing to this image has a cross section equal to the area of the dish at a distance of 70 m south of the heliostat. At this location we placed the dish in order to intercept all rays. From the primary image of the sun situated 30 m behind, the dish produces a secondary image in a plane situated 12 cm behind its focal plane. The secondary image is calculated to have a diameter of 6 cm and a numerical aperture of 0.64 (f-number = 0.78). Thus except for reflectivity losses, the concentration ratio of the furnace is expected to correspond to that of the dish if used alone tracking the sun, while the total power is basically that intercepted by the much larger heliostat. This two-stage concentration has the advantage of requiring a smaller dish which can be at the same time cheaper and of higher optical quality. The disadvantage is that oblique reflection at the heliostat causes an astigmatism which distorts the secondary image to an ellipse roughly 15 cm × 6 cm and reduces the concentration ratio accordingly. This effect is larger for larger angles of incidence and for smaller dish dimensions. We show the flux distribution measured in the secondary plane of our heliostat and discuss possibilities to improve the optics by compensating the astigmatism." @default.
- W1963786602 created "2016-06-24" @default.
- W1963786602 creator A5025894602 @default.
- W1963786602 creator A5031503998 @default.
- W1963786602 date "1990-12-01" @default.
- W1963786602 modified "2023-09-23" @default.
- W1963786602 title "The optics of a two-stage solar furnace" @default.
- W1963786602 cites W2016412375 @default.
- W1963786602 cites W2062403294 @default.
- W1963786602 doi "https://doi.org/10.1016/0165-1633(90)90055-6" @default.
- W1963786602 hasPublicationYear "1990" @default.
- W1963786602 type Work @default.
- W1963786602 sameAs 1963786602 @default.
- W1963786602 citedByCount "46" @default.
- W1963786602 countsByYear W19637866022012 @default.
- W1963786602 countsByYear W19637866022013 @default.
- W1963786602 countsByYear W19637866022014 @default.
- W1963786602 countsByYear W19637866022015 @default.
- W1963786602 countsByYear W19637866022016 @default.
- W1963786602 countsByYear W19637866022017 @default.
- W1963786602 crossrefType "journal-article" @default.
- W1963786602 hasAuthorship W1963786602A5025894602 @default.
- W1963786602 hasAuthorship W1963786602A5031503998 @default.
- W1963786602 hasConcept C116903202 @default.
- W1963786602 hasConcept C119599485 @default.
- W1963786602 hasConcept C120665830 @default.
- W1963786602 hasConcept C121332964 @default.
- W1963786602 hasConcept C127413603 @default.
- W1963786602 hasConcept C1276947 @default.
- W1963786602 hasConcept C135436540 @default.
- W1963786602 hasConcept C138395690 @default.
- W1963786602 hasConcept C15336307 @default.
- W1963786602 hasConcept C15469602 @default.
- W1963786602 hasConcept C15744967 @default.
- W1963786602 hasConcept C19417346 @default.
- W1963786602 hasConcept C24890656 @default.
- W1963786602 hasConcept C2775936607 @default.
- W1963786602 hasConcept C2777348173 @default.
- W1963786602 hasConcept C3756478 @default.
- W1963786602 hasConcept C541104983 @default.
- W1963786602 hasConcept C58650310 @default.
- W1963786602 hasConcept C63655563 @default.
- W1963786602 hasConcept C78336883 @default.
- W1963786602 hasConcept C81253797 @default.
- W1963786602 hasConcept C82552819 @default.
- W1963786602 hasConceptScore W1963786602C116903202 @default.
- W1963786602 hasConceptScore W1963786602C119599485 @default.
- W1963786602 hasConceptScore W1963786602C120665830 @default.
- W1963786602 hasConceptScore W1963786602C121332964 @default.
- W1963786602 hasConceptScore W1963786602C127413603 @default.
- W1963786602 hasConceptScore W1963786602C1276947 @default.
- W1963786602 hasConceptScore W1963786602C135436540 @default.
- W1963786602 hasConceptScore W1963786602C138395690 @default.
- W1963786602 hasConceptScore W1963786602C15336307 @default.
- W1963786602 hasConceptScore W1963786602C15469602 @default.
- W1963786602 hasConceptScore W1963786602C15744967 @default.
- W1963786602 hasConceptScore W1963786602C19417346 @default.
- W1963786602 hasConceptScore W1963786602C24890656 @default.
- W1963786602 hasConceptScore W1963786602C2775936607 @default.
- W1963786602 hasConceptScore W1963786602C2777348173 @default.
- W1963786602 hasConceptScore W1963786602C3756478 @default.
- W1963786602 hasConceptScore W1963786602C541104983 @default.
- W1963786602 hasConceptScore W1963786602C58650310 @default.
- W1963786602 hasConceptScore W1963786602C63655563 @default.
- W1963786602 hasConceptScore W1963786602C78336883 @default.
- W1963786602 hasConceptScore W1963786602C81253797 @default.
- W1963786602 hasConceptScore W1963786602C82552819 @default.
- W1963786602 hasIssue "2-3" @default.
- W1963786602 hasLocation W19637866021 @default.
- W1963786602 hasOpenAccess W1963786602 @default.
- W1963786602 hasPrimaryLocation W19637866021 @default.
- W1963786602 hasRelatedWork W1963786602 @default.
- W1963786602 hasRelatedWork W1968957595 @default.
- W1963786602 hasRelatedWork W1993816944 @default.
- W1963786602 hasRelatedWork W2005627442 @default.
- W1963786602 hasRelatedWork W2035708269 @default.
- W1963786602 hasRelatedWork W2100254196 @default.
- W1963786602 hasRelatedWork W2134530681 @default.
- W1963786602 hasRelatedWork W2386374838 @default.
- W1963786602 hasRelatedWork W3014442983 @default.
- W1963786602 hasRelatedWork W4200280392 @default.
- W1963786602 hasVolume "21" @default.
- W1963786602 isParatext "false" @default.
- W1963786602 isRetracted "false" @default.
- W1963786602 magId "1963786602" @default.
- W1963786602 workType "article" @default.