Solar collector
Patent
·
OSTI ID:5083674
A method of making concrete solar collector panels having a pattern of internal passageways is described comprising the steps of: (A) depositing in a mold for the panel a first layer of fiber reinforced concrete slurry, (B) placing on said first layer a dissolvable polymer foam core for forming the internal passageways, (C) depositing a second layer of concrete slurry around said core, (D) depositing a third layer of fiber reinforced concrete slurry, (E) releasing the panel from the mold when the concrete has set, (F) curing the concrete (G) drying the panel, (H) dissolving the polymer foam core in a solvent for the polymer, (I) causing the solution of solvent and polymer to permeate and coat the concrete surfaces defining the internal passageways, (J) draining the solution out of the internal passageways, and (K) evaporating the solvent from the solution which remains to form a hardened polymer coating on the surfaces of the internal passageways.
- Assignee:
- IFI; EDB-80-122474; ERA-06-000564
- Patent Number(s):
- US 4213929
- OSTI ID:
- 5083674
- Country of Publication:
- United States
- Language:
- English
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