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To: John B. Smyth who wrote (3098)4/13/1998 8:37:00 PM
From: kormac  Read Replies (3) | Respond to of 9980
 
John, I haven't investigated how much energy it takes to produce a solar cell, but you are absolutely right in pointing out its importance. Alfred North Whitehead says that every educated person should understand the second law of thermodynamics. If one, in addition,
undertands the concept of thermodynamic availability, one is in great position to call the hubris of producing liquefied fuels from low
quality Montana and Wyoming shale. It was Carter (an engineer that should have known better) that advocated this.

Sincerely, Seppo



To: John B. Smyth who wrote (3098)4/13/1998 8:49:00 PM
From: Zeev Hed  Read Replies (1) | Respond to of 9980
 
John, a solar cell has to survive for about 15 to 20 years to return its cost (without installation) at $.10/kw-hr (and assuming 8 hours of "full solar flux" per day-<VBG>). Not a very good return on investment in my book.

Zeev