Zero Point Energy is real energy, so why are all attempts to tap it "junk science"? There are many many references you can look up. Here is a fairly readable review of the evidence:
http://users.erols.com/iri/ZPEpaper.html
Below are some respectable web sites (NASA, harvard, etc.) with more information.
1. The Casmier Effect.
http://physicsweb.org/article/world/15/9/6
http://math.ucr.edu/home/baez/physic...m/casimir.html
http://antwrp.gsfc.nasa.gov/apod/ap020917.html
http://cfa-www.harvard.edu/~babb/casimir-bib.html
2. Lamb Shift
"Another historically valid test in the verification of ZPE has been what's been called the "Lamb shift." Measured by Dr. Willis Lamb in the 1940's, it actually showed the effect of zero point fluctuations on atomic levels."
http://www.pha.jhu.edu/~rt19/hydro/node8.html
http://scienceworld.wolfram.com/physics/LambShift.html
http://hyperphysics.phy-astr.gsu.edu...m/lamb.html#c1
http://xxx.lanl.gov/abs/hep-th/9901011
A method for extracting Zero Point Energy is patented technology. The US patent office does not award junk science patents to the best of my knowledge.
"History was made on 12-31-96 when for the first time ever, ZPE was the subject of a U. S. patent (#5,590,031). Dr. Frank Mead, from Edwards AFB, has designed receivers to be spherical collectors of zero point radiation with hemisphere reflectors of beat frequencies."
http://patft.uspto.gov/netacgi/nph-P...&RS=PN/5590031