Heat-reclaiming system
US4256176A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1978 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Apr 10, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heat-reclaiming system is especially adapted for reclaiming heat from used laundry water. It comprises a heat exchanger providing for heat transfer from warm used laundry water to cold incoming water intended for use as fresh laundry water. The heat exchanger is formed with interior ducts and an outer shell. The interior ducts, preferably concentric coils hydraulically in parallel, define a space for the transport through the heat exchanger of the cold incoming water. The outer shell encloses the ducts, and the ducts and shell together define a space providing for the transport through the heat exchanger of the warm used laundry water. The flows of the warm and cold water through the heat exchanger are generally in opposite directions. Maximum heat-transfer efficiency is accomplished by simultaneously pumping both the shell and the duct sides of the exchanger at design flow condition and maximizing the log mean temperature difference across the heat exchanger. The heat exchanger is mounted above a pit that stores the used laundry water before it is introduced into the heat exchanger. The shell is of roll-away design and carries a pit cover plate that normally covers the pit but e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.