Solar cooker concentrator of the box type, using cpc-type optics

a solar cooker and concentrator technology, applied in the field of solar cooker concentrators of box types, using cpc-type optics, can solve the problems of inconvenient presentation of low global efficiency, less efficient and lower power delivery of energy to the cooking vessel, and less value for the very large number of potential users

a solar cooker and concentrator technology, applied in the field of solar cooker concentrators of box types, using cpc-type optics, can solve the problems of inconvenient presentation of low global efficiency, less efficient and lower power delivery of energy to the cooking vessel, and less value for the very large number of potential users

US20040134485A1Inactive Publication Date: 2004-07-15SUN - CIA DE ENERGIA SOLAR
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  • Solar cooker concentrator of the box type, using cpc-type optics
  • Solar cooker concentrator of the box type, using cpc-type optics
  • Solar cooker concentrator of the box type, using cpc-type optics

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Embodiment Construction

[0014] The present invention introduces improvements in the state of the art of past technology, through a new product combining for the first time in an ideal way (ideal in the sense of Non-Imaging or CPC type Optics) the two basic approaches described above, being of the box type but also of the concentrator type with Non-Imaging Optics integrated in the box itself with an exterior augmenting reflector. This optics, in contrast with the focusing one referred above, allows for solar radiation concentration without the need to track the sun in its apparent daily motion, resolving one of the inconveniences referred, at the same time allowing for more power and temperature into a box type cooker, as it is typical of the concentrating focusing types. The use of augmenting reflectors (on the back of the lid and lateral ones) is also made in an integrated fashion with the inside optics, sharing in this way the Non-Imaging optics characteristics referred above. The side reflector, only on...

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Abstract

Solar cooker of the concentrating type, using Compound Parabolic Concentrator type optics (2, 2') comprising a box (1), inside which all its accessories and cooking utensils can be carried; the box being essentially made of plastic compatible with the production of complicated curves characteristic of the referred optics. The present invention includes a version in which electrical energy is used as backup for days without sunshine. Its application extends to other areas beyond the cooking of foodstuffs, in particular to the pasteurisation of water, milk and other products and its usage as a drying system.

Description

1--OBJECT OF THE PRESENT INVENTION[0001] The goal of the present invention is a solar cooker, simultaneously of the box type and concentrator, by the explicit use of Non-Imaging Type Optics, also referred to as Ideal or of the Compound Parabolic Concentrator Type (CPC), to cook food in temperature and power conditions higher than the ones used in conventional box cookers, but conserving and even improving the working characteristics of those cookers, in particular in what pertains to stationarity and control of cooking time. Another fundamental aspect of this invention is the achievement of great sophistication for the optics used together with low fabrication cost, from a materials point of view and from the point of view of the fabrication process, given the choice of plastic for both the external envelope and the inner cooker structure. The solution established by the present invention is the first one to allow the fabrication of solar cookers in large series production, with a t...

Claims

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Application Information

Patent Timeline
15 Jul 2004
Publication
US20040134485A1
IPC
F24J2/10; F24J2/02; F24S20/30; F24S23/70
CPC
Y02E10/40; F24J2002/1042; Y02B40/18; F24J2/1047; F24J2/02; Y02A40/926; F24S23/80; F24S20/30
Inventors
PEREIRA, MANUEL; OLIVIERA, JO?ATILDE,O