| 摘要 |
The present invention is a jacket-type drainpipe heat exchanger to heat fres h 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 an d venting for visible leak detection satisfies plumbing code requirements. Use on vehicula r 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.
|
