Joel Goodman

Joel Goodman is a research architect living in , USA. After a few solar cooking experiences in the 1970-80s, he began studies of small-mid size solar kitchens using built-in fixed ovens (2003), inserted solar box cookers (2005), and augmented with building size nonimaging fixed reflector troughs with adjustable end reflectors (2007)(2009). 
Because of outgassing concerns from materials (insulation, glues, etc.) inside of augmented box cookers, and box cookers take up space in kitchens, mid-size kitchen studies began with thru-wall greenhouse type (HotPot, etc.) ovens (2006), and recently for small houses with thru-wall greenhouse type ovens combined with improved cook stoves, revealing house plan and solar access planning requirements. Additional studies are for exterior furniture fixed reflectors augmenting box cookers.
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*December 2024: The University of California, Merced, USA, research history and profile of Joel Goodman and his development of Thru-Reflector Wall(TRW) Solar Cooker Kitchens: Ukamaka Ezimora, Ruth Agorrilla, Daniel Christian Abrenica, Santiago Garcia. Issue 17, Vol. 1, December 2024 Read the paper... 
*November 2024: A TRW solar air dryer could work with an inverted clear glass bowl on a black duct coil with a suction fan. An oven door would not be required and the drying cabinet could be in the kitchen
*April 2024: BICNR & BECNR: Building Interior & Exterior Collectors and Nonimaging Reflectors DIAGRAMS
*April 2024: Two linear funnels (two cookpots and a linear oven) study with fired clay
*March 2024: Two linear funnels (two cookpots and a linear oven) study with fired clay
*March 2024: Removable extra reflector for early, late day sun angles
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*February 2024: TRW Funnel 3-CPC part design, molds, and prototype manufacturing project
*February 2024: TRW Funnel 3-CPC part design, molds, and prototype manufacturing project
*February 2024: Clay molded corner pieces
*January 2024: Mirrored ceramic floor tiles
*January 2024:TRW molds test molding
*January 2024: Thru-Reflector-Wall (TRW) Nonimaging concentrator solar kitchen studies 
*December 2023: Thru-Reflector-Wall (TRW) Nonimaging concentrator solar kitchen studies 
*December 2023: TRW solar cooker kitchens--5-piece funnel with 2 molds studies
December 2023: TRW Nonimaging concentrator solar kitchen studies
November 2023: TRW Building-Integrated-CPC commercial Solar dryer concept study
October 2023: Precast concrete and ferrocement TRW 3-sided CPC funnels for Tropics
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October 2023: Formed metal
August 2023: TRW Split bamboo rectangular frame + polycarbonate film unsealed cover
July 2023: TRW nonimaging concentrator solar kitchen studies
July 2023: TRW nonimaging concentrator solar kitchen studies
July 2023: TRW three-CPC funnel test stand reflector 
*July 2023: 
*June 2023: TRW CPC-Type Funnel Studies 
*June 2023: Joel Goodman facilitated the the publication of the included research papers of E Vijayakrishna Rapaka and his team in India completed in the 2005 and 2006. - E Vijayakrishna Rapaka - E Vijayakrishna Rapaka
*May 2023: TRW small low-cost masonry house in the tropics studies - A TRW configuration favored at this time for small masonry house studies is an ordinary-CPC type funnel-box with horizontal inlet aperture, flat trapezoidal kitchen wall reflector and vertical E/W portable reflector. Cookware options in the funnel-box are placed on a ‘square’ reflector plate that defines the cookware door width and associated lintel. An option is a temporary transparent horizontal unsealed cover glazing on the funnel box inlet. A TRW with a large cookware door would coincide with a main TRW characteristic that is: large, heavy or cumbersome cookware too inconvenient to carry outside to a solar cooker in bright sunlight may be used by cooks inside a TRW kitchen. Cookware options that fit thru the door and fit on a ‘square’ reflector plate include: a large diameter cylindrical cookpot, multiple smaller cookpots, and a cubic black metal oven. Aluminum or flat glass mirror CPC-type reflectors are in the funnel-box. Flat glass mirror reflector tiles forming a trapezoidal shape on the kitchen wall above the cookware door are being considered. The incline of the trapezoidal reflector is influenced by the latitude location. Construction materials and methods could influence cookware door size and TRW funnel-box shape e.g., Compressed Stabilized Earth Blocks (CSEB) standard shapes and sizes. 
*May 2023: CPC shape funnel-box filler-blocks for TRW solar cooker kitchens
*May 2023: TRW Kitchen Wall Trapezoidal Reflector shape studies
*March 2023: TRW study with up to 21- 33 Qt cook pots - A TRW solar kitchen study is with up to 21- 33 Qt cookpots, part of a constructional study to size the cookware door and funnel-box and glass cover-glazing, etc. Comparative studies for a tracking parabolic dish solar cooker with a less than 5-liter pot outside with a TRW solar kitchen 21-33 Qt pot should include: time to cook, amount of food (e.g., rice and beans) and time and work to handle the cookware. 
*February 2023: TRW Feb 13, 2023 masonry vertical mirror wall studies
*February 2023: TRW Feb 11, 2023 Thru-Reflector-Wall nonimaging concentrator solar kitchen studies 
*February 2023: Building interior cookers and nonimaging reflectors (BICNR) for high latitude locations
*February 2023: TRW Feb 6, 2023 prefabricated funnel-box with ordinary CPC-type reflectors
*February 2023: Latitude locations suitable for TRW vertical kitchen wall fixed reflectors (+/- 23.5 degrees)
*February 2023: Thru-Reflector-Wall (TRW) Nonimaging concentrator solar kitchen studies
*January 2023: Thru-Reflector-Wall (TRW) Nonimaging concentrator solar kitchen studies 
*January 2023: A TRW ferrocement funnel box size is related to the largest cookpot diameter that can pass thru the cookware door. The vertical box height (Hb) is coordinated with masonry courses of CSEB 
*January 2023: TRW Kitchen Building study - Equator zone with seismic hazard: Seismic hazard TRW building construction would have higher costs with reinforced concrete frames. TRW solar cooker-kitchens nonimaging concentrator demonstration building preliminary studies in progress include: non-seismic hazard and seismic hazard locations in the Torrid Zone for approximately three latitude regions, the equatorial 0-8 degrees latitude, 9-15 degrees latitudes, and 16-23.5 degrees latitudes. Development of TRW demonstration building studies is related to the results of the TRW solar cooker-kitchens test stand projects now in progress by Dr. Atul Sagade. 
*January 2023: TRW studies for a small house in the Torrid Zone
*January 2023: Thru-Reflector-Wall (TRW) Nonimaging concentrator solar kitchen studies 
*January 2023: TRW test stand with box cooker and bamboo
*January 2023: TRW vertical masonry test wall studies with prefabricated ferrocement funnel-box and CSEB
*December 2022: TRW Vertical Masonry Kitchen Wall Studies 
*November 2022: TRW Small house kitchen vertical CSEB wall study'''
*November 2022:Thru-Reflector-Wall (TRW) nonimaging concentrator solar kitchen studies update 11/14/22 
*November 2022:Thru-Reflector-Wall (TRW) nonimaging concentrator solar kitchen studies update. Prof Dr. Atul Sagade has started a TRW test stand project in India and is planning another in Chile.
*October 2022: Thru-Reflector-Wall (TRW) nonimaging concentrator solar kitchen studies update
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*October 2022: Thru-Reflector-Wall (TRW) nonimaging concentrator solar kitchen studies update 
*September 2022: 
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*September 2022: TRW Kitchen Wall Reflectorก TRW kitchen wall reflector details depend on the kitchen building wall optical shape related to latitude location and construction materials and methods. For example, flat glass mirror tiles on masonry, ferrocement or wood wall parts. A TRW kitchen wall shape may be vertical or near vertical to avoid overhanging reflectors near about 23.5 degrees latitude (e.g., about 17-27 degrees); and sloped near the equator (about 0 จC 15 degrees from vertical) with possibility of nonimaging one-sided CPC type slight curvature that would complicate construction. A wider target rectangle (Wo) with larger and multiple cookware may extend the latitude location range to about 30 degrees + for vertical kitchen wall reflectors and seasonal applications. Latitudes with 30 degrees + north and south cover an extensive global area and huge populations. However the site latitude locations need TRW solar engineering to specify reflector shapes and inclinations. TRW TEST STAND studies - All dimensions thus far are preliminary guesses in order to study construction feasibility. In fact, the TRW Test Stand dimensions may be reduced when based on solar engineering. Final dimensions would be based on optical-thermal engineering analysis for selected cookware target(s) and regional latitude specifics. 
*August 2022: After specification of one side of a CPC mirror wall (B-T) for selected location, associated building integration studies could be developed in more detail. Slides attached.
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*July 2022: 
*June 2022: Thru-Reflector-Wall (TRW) nonimaging solar concentrator studies for big and heavy targets
*November 2021: Thru-reflector-wall (TRW) nonimaging concentrator solar cooker kitchen studies 
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*October 2021: 
*October 2021: Bamboo CPC solar cooker kitchen studies for Auroville region - The 32 degrees ½ acceptance angle truncated CPC (Rapaka Oct. 2006 p22) is inclined about 12 degrees south towards the equator for the Auroville area latitude location. The CPC trough is inclined similar as the solar bowl. The horizontal line from B on the left parabola segment to C’ on the right parabola segment is Wo (CPC width outlet). The horizontal line from A on the left parabola segment to D’ on the right parabola segment is Wi (CPC width inlet). An asymmetric truncated CPC is defined for about 12 degrees locations. Rapaka, E. V. K., Report No.3: Study on the optical and thermal properties of a compound parabolic concentrator with and without end-wall reflectors for Pondicherry region, Oct. 9, 2006, Department of Mechanical Engineering, Pondicherry Engineering College, Pillaichavady, Pondicherry, INDIA. CPC expert solar engineers may advise differently, however the differences are likely to be small angular differences, and the presented preliminary CPC characterization is sufficient for preliminary design of reflector facets and bamboo structure. 
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::thumb|left|400px|Jay Holmes video Feb 7-2016 reference for BIETR project
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*January 2015: . Two prefabricated parts that fit together are: a thru wall door frame CSEB masonry form; and an unglazed reflector box with cookware support grill. An intention is for large quantity production with bio-plastics and in-shop mirror tiling. An aim is to produce prototypes with ferrocement or other suitable prototype materials. Cookware sizes determine door clearance dimensions. A nonimaging solar concentrator may work well enough for a few cookware volumetric targets, for example, three HotPots TM in a line and two all-glass ~4”x 1m evacuated tubes (GoSun, etc.). Dimension E is tall enough for upward door swing clearance. A thru-wall solar cooker has significant house plan and site design solar access factors, complicating house cluster and multi-story design.
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*July 2014: . A thru-wall solar kitchen building or trailer has a vertical oven door (0 in Fig A); and reflector parts (Fig A): 1 is a reflector wall above the oven door; 2 is a box with horizontal or inclined inlet aperture (unglazed or glazed); 3 is a ridged- pyramid base/bracket; 4 is an E and W end adjustable or repositioned at noon; and 5 is the other side of a two-sided trough. Cookware targets (Fig B)include: w-1 roaster pots; w-2 HotPots TM; and w-3 all-glass evacuated tubes. Multi-tube racks rolls/slides in-out thru the oven door into the exterior cooking zone. A five tube rack is illustrated in Fig. C. The tubes are horizontal or near horizontal. 
*July 2014: . Thru-wall solar kitchen with multi-tube racks roll in-out thru doors into the exterior cooking caustic zone, so that batch after batch can be cooked in a day. The multi-tube racks are within the volume of the exterior nonimaging reflector boxes, avoiding wind, and so that E and W end reflectors (repositioned at noon) flapping in wind gusts could not damage the tubes. The tubes can slip out of the racks for ease of tube cleaning.
*April 2014: 
*April 2014: See adjacent accompanying diagrams and text.
*March 2014: Reflected nonimmaging concentrated sunlight from a CPC-type trough thru a vertical wall opening to reflectors funnel sunlight upward to the underside of cookware.
*March 2014: Converting a sun-facing double-hung window wall for non-snow season cooking and baking. The lower window part becomes the cookware doorway to the exterior concentrating reflectors. The window width influences the inlet size of a reflector ‘box’, securely attached to the exterior building wall. Roof overhang and gutters can limit the height of the upper reflector fixed to the building wall around the upper window part (above the box). The reflector ‘box’ would be removed for the snow season and the reflectors on the double-hung window could be removed as well for daylighting and passive cold season heating. 
*February 2014: Joel explains his Nonimaging concepts, with the intent they be considered for further evaluation. Read more, and see other drawings at: 
*February 2014: Community kitchen concept shares central solar reflector. Read more about it at: 
*October 2013: 
*September 2013: Discussion of a schematic design for a thru-wall non-imaging reflector. 
*September 2013: A thru-wall fixed nonimaging (NI) reflector concentrator for ovens, cookers, autoclaves, etc. may be a lightweight for the most part attachment to a house or trailer wall. A NI ‘box’ has four creased aluminum-reflector elements attached together, secured to a square based two-angles pyramid-reflector(with grill posts) supported on a bracket(s) structured to the wall. Augmentation is with fixed reflectors attached to the wall, and E and W repositioned reflectors at noon with wind fail-safe design. 
*July 2013: Joel will be presenting the design for his Thru-wall fixed concentrator oven-cooker at the Dodgeville Public Library in , USA on August 15, 2013: See the Calendar of events. Preview images
*June 2013:
*January 2013: A mirror-tiled concrete base, with grill support bolts casted in, is a nonimaging concentrator shape segment to reflect solar radiation upwards to the underside of cooker-ovens.
*December 2012: Joel Goodman describes and illustrates the constraints and opportunities for incorporating a permanent thru-wall solar cooker in home design. 
*November 2012: Joel Goodman describes and illustrates the characteristics of compound parabolic concentrators. Read more: 
*October 2012: The adjacent drawing illustrates using a fixed one-sided reflector trough to augment a built-in solar cooker.
*September 2011: When a thru-wall cooker counter height is higher, 36 inches/ 915mm above kitchen floor level, and the outdoor ground level is lower, 24-36 inches or more below the kitchen floor level, a more substantial construction is required to support the fixed reflector concentrator, possible with an integrated small storage space/room. And a higher rainwater drain permits water storage with a higher gravity flow.
*May 2011:
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*January 2011: A building integrated fixed reflector non-imaging mid-size solar kitchen schematic for non-seismic locations combines: multiple thru-mirror wall greenhouse type ovens on one side, and on the other side a scoop type reflector concentrator.
 
*The adjacent illustration of a partial house kitchen plan illustrates orientation and solar access requirements for a thru-mirror wall greenhouse type oven. The top edge of a nonimaging fixed reflector can align with different wall and roof house construction types and shapes.
:Various fabrication-construction methods for a chair-size thru mirror wall oven nonimaging reflector concentrator include:
::# Masonry substrates (compressed stabilized earth blocks, fired bricks, etc.) for gluing flat laminated glass mirror segments.
::#Bent metal reflectors bolted to a center concrete pyramid with glued reflectors.
::# Prefabricated injection molded plastic substrates for adhering reflectors.
*December 2010: Joel has provided some conceptual ideas for incorporating thru-wall solar oven, and solar still installations.
==Documents==
*March: 
*June 2003: Goodman, Joel H., "Selected Building Integrated Active Solar Energy Structures", International Solar Energy Society Solar World Congress, Gothenburg, Sweden, June 14-19, 2003.
*2005: Goodman, J.H., (2005) Solar Cooking Kitchen Studies with Building Size Nonimaging Reflectors, ISES Solar World Congress, Orlando, Florida, 8-2005
*August 2006: Goodman, Joel H., “Architectonic studies with building size nonimaging reflectors”, invited, Proceedings of the World Renewable Energy Congress IX, Florence, Italy, Aug., 2006.
*2007: Goodman, Joel H., (2007),“Architectonic Studies with Selected Reflector Concentrating Solar Collectors”, Journal of Green Building, Vol. 2 Number 2, Spring, College Publishing, pp 78-108.
*January 2009: Goodman, Joel H., Building Size Fixed Reflector CPC Troughs and Bowls for Food Processing Facilities, Proceedings of the International Solar Food Processing Conference, ISES, Jan. 2009, Indore, India
*January 2009: Building size fixed reflector CPC Troughs and Bowls for Food Processing Facilities - Joel Goodman
*August 2012: Goodman, Joel H., 
*July 2014: Goodman, Joel, H., . In this presentation, Joel offers a strong summary and discussion of his body of work of merging architecture and solar cooking.
==Contact==
Joel H. Goodman
P.O. 14, Dodgeville, 53533
USA
Tel: (608) 935-5483
Email: joelhgoodman3@hotmail.com
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