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[信息] 布鲁斯的涅菲尔透镜太阳灶

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发表于 2014-3-22 06:02:00 | 显示全部楼层 |阅读模式
布鲁斯的涅菲尔透镜太阳灶

This fresnel lens solar cooker was made by Bruce Joseph () in Tucson, Arizona. Bruce has done a few versions and is constantly working on improvements, as you can tell from the sequence of photos below. My own use of a tripod came from looking at his photos. Thank you to Bruce for sharing this for all to benefit.
A bit about Bruce's work in solar (as of June 2011): I just was appointed the Chair of Citizens For Solar, a Tucson non-profit which has held a large, open-to-the-public Solar Potluck for the last 29 years. (I've only participated for the last three.) I also run Tucson's "Solar Society" Meetup group. I'm also a "Tucson Green Technology" writer for Examiner.com.
If you're unfamiliar with fresnel lenses see this page all about fresnel lenses.
I use a table setup rather than a stand and a tripod for my Fresnel lens grill. [Bruce used to use a tripod. See first photo below.] I've cooked burgers, steak, chicken breasts and grilled cheese sandwiches on it. Because the Fresnel cooks from the top, I heat my skillet first, put my food on it, then cover the food with a flat lid that rests on the food. This helps heat the food evenly, and keeps me from having to constantly stir it. I found that the table is much easier, and safer to use than the tripod setup, and it was very easy to build. I also have a SHE Hot Pot that I've used to cook chicken, pork, ribs and paella.
My original setup. (Stand and tripod.)
 楼主| 发表于 2014-3-22 06:03:39 | 显示全部楼层

布鲁斯的涅菲尔透镜太阳灶

布鲁斯的涅菲尔透镜太阳灶

[The remaining photo's are of a newer version. Notice how the food is always at the focal point of the fresnel lens. This is done by having the pivot point for the lens' "legs" lined up with the grill table no matter what angle the lens is at. The animation beside the photo below illustrates this.]
Fresnel grill table and telescoping curtain rod.

布鲁斯的涅菲尔透镜太阳灶

布鲁斯的涅菲尔透镜太阳灶

Note how the same area on the grill table is always at the lens' focal point.
 楼主| 发表于 2014-3-22 06:04:31 | 显示全部楼层

涅菲尔透镜太阳灶

涅菲尔透镜太阳灶

Cooking surface detail. I now use a round cast iron skillet as a cooking surface with an aluminum fajita pan lid resting on the food.

涅菲尔透镜太阳灶

涅菲尔透镜太阳灶

Notice the "sun tracker" on the arm as well as the window blind and wheels.
 楼主| 发表于 2014-3-22 06:05:31 | 显示全部楼层

涅菲尔透镜太阳灶

涅菲尔透镜太阳灶

I usually use the grill "full out", so the window blind is for "emergency shutdown". In reality, I don't use it very often. It's just as easy to pivot the lens out of alignment with the sun if necessary.
Boiling water for coffee in a 1 liter water bottle.

涅菲尔透镜太阳灶

涅菲尔透镜太阳灶

Notice that in the above two photos the wheels are on different legs. Moving the wheels had to do with transport. When not in use, the lens arms are bolted to the frame, and extend beyond it. Putting the wheels at the opposite end let me use them as handles, and roll the grill like a wheelbarrow. When cooking, it would be better to have the wheels at the front, so that you could pick up the back end, pivot the grill, and set it back down. The next version may have 4 lockable wheels. (I think that slightly larger wheels would work much better.)
发表于 2014-7-31 14:37:36 | 显示全部楼层
啥玩应呀
发表于 2014-9-8 08:19:39 | 显示全部楼层
现在夏天  车顶上上就能摊鸡蛋了   
发表于 2014-11-27 00:14:12 | 显示全部楼层
为保住菊花,这个一定得回复!
发表于 2014-12-19 02:57:21 | 显示全部楼层
好好 学习了 确实不错
发表于 2014-12-19 07:42:19 | 显示全部楼层
学习资料。。。
发表于 2014-12-21 07:51:42 | 显示全部楼层
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