That is not brightsource high pressure 1500 psig, Home Depot mirrors, water boiler and steam turbine technology so no, I am not short sited.
You listed a hybrid PV technology to cool cells and re-use low grade heat. Big difference. On Tuesday, February 25, 2014, Jones Beene <jone...@pacbell.net> wrote: > *From:* ChemE Stewart > > > > I can slap in a 50 MW peaking solar PV field in a couple months for 1/2 > the price and a year and 1/2 faster than a solar thermal plant. Obsolete > technology. Period > > > > That is very short sighted. It ignores the inevitable progress and the > vast possibilities for synergy in the next generation. In fact, this > particular technology is not far from the cutting edge, if a relatively > simple upgrade can be implemented. > > > > They - which includes Google - are already talking about the next > generation of concentrated solar. It is called CPVT. The same heliostats, > or the same collector surfaces - which are installed in the Mojave site, or > preferably a smaller site - could even be used but with a twist. > > > > If you can slap a PV field together in a couple of months then a hybrid PV > panel can be slapped onto existing mirrors in a couple of weeks, and R&D is > already underway to do this. Alternatively, high temperature PV panels are > placed over the collector exterior. Both of these require a different kind > of PV cell which skims off photon spectra - one can be high pass and the > other low pass; and then either reflects most photons or absorbs them. In > fact the PV can be added to both mirror and collector of concentrated solar > thermal. > > > > The hybrid technology is called CPVT and it can employ an existing mirror > rendered partly reflective since the modified PV panel is located on the > mirror, or as the covering for an existing collector it will permit thermal > transfer. In some cases the PV part will be less efficient than normal PV, > but a large fraction of photons are reflected and concentrated. Synergy > exists, since you get the free heliostat steering (sunk cost) of the > existing mirrors. > > > > Here is a CPVT version for parabolic troughs which is already in place. > > > > > http://chromasun.com/images/content/papers/Initial%20field%20performance%20of%20a%20hybrid%20CPV-T_May2012.pdf > > > > Here is an CPVT system for distributed (home) use. Makes perfect sense > since very hot water for home heating is essentially free. > > http://solvarsystems.com/company/index/items/27 > > > > Here is a bibliography that focuses more on the non-concentrated version, > which is called PVT. > > > > http://www.hindawi.com/journals/ijp/2012/307287/ref/ > > > > There is nothing obsolete about concentrated solar thermal as the first > step towards a hybrid, especially as it progresses to CPVT. However, it > should be perfected for distributed cogen systems first IMO. Unfortunately > Google is not very interested in the distributed option. > > > > > > >
