[Gasification] solar collector

[GFWHELL at aol.com]

The loft of my workshop was hot: I needed insulation to keep the heat from  
the work area.
It then occurred to me that my loft was one big   rather  efficient  SOLAR 
COLLECTOR.
 
 Even on cold days it got hot if the sun was up. So I hoisted up a 1  kW.  
water cooled heat pump into the loft and started transferring the heat  into a 
140 gallon hot tub.
 It raised the temperature 18 deg in a little over an hour. Where  as the 6 
kW emersion heater would take about 5 hours to accomplish the same  task.
I guess that was rather high tech and expensive for collecting  energy.
 The flat roof of my porch on the south side of the house was really  an 
ideal site for a low tech solar collector.
So I made a 10 kW  collector using 2 liter Coke bottles, 
First I had to collect 600 bottles which took a few months,  I threaded them  
9 in a row onto:  53, lengths of 1/2",   thin wall plastic tube, by drilling 
a hole in the base of each bottle. First  painting the pipe black. The bottles 
provide a "green house" effect on the  enclosed tube.
 
My swimming pool pump easily circulated the pool water through the  
additional pipe work, which consisted of two parallel 1.5" pipes using 1.5" x  1/2" 
branch tees,  connecting 53. 10 ft long  coke bottle elements,  connected in 
parallel.  In a stalled condition this system,  will  generate steam.
I believe I could build an ORC system using this form of heat  collection.
Using say a water cooled refrigeration condenser to capture the heat and  
using R 22 as the fluid to push a scroll compressor, what are my  chances?