F - Mech Eng,Light,Heat,Weapons – 28 – D
Patent
F - Mech Eng,Light,Heat,Weapons
28
D
F28D 7/16 (2006.01) E03C 1/12 (2006.01)
Patent
CA 2626219
The present invention is a jacket-type drainpipe heat exchanger to heat fresh cold water using the waste heat in the drainwater. Various clamp-on vertical and horizontal embodiments are disclosed including a one- two- half jacket design for installation on operating drainpipes. A further embodiment has protected heat storage. Normal cold water pressure is used to create a high force thermal contact for fast heat transfer. In the vertical embodiments a longitudinal gap in the jacket (or a two-piece jacket) enables clamping movement from an external sleeve and band clamps. Protected heat storage is provided by thermosiphoning with a raised reservoir. A horizontal embodiment discloses a two-piece plastic- copper design. Pre- heated cold water from the exchanger is plumbed to a faucet or water heater so as to reduce energy use and related greenhouse gas emissions. Double-wall construction and venting for visible leak detection satisfies plumbing code requirements. Use on vehicular or other combustion engine exhaust pipes is also contemplated for providing instant interior heat and/ or motor warm-up and/or for other heating requirements.
Mackelvie Winston R.
Na
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