When dyeing fabrics, hot water inevitably is used in large quantities in most processes. Although the temperature of the hot water required for each step of the process is different, the temperature of the wastewater that is normally discharged is 40 ° C, and the temperature rise effect of about 20 ° C can be expected compared to the annual average temperature of industrial water.
In the papermaking process, waste water generally is discharged at 40 ~ 50 ℃ and the water used in the process should be kept at 30 ~ 50 ℃. In addition, it is difficult to treat the waste water of 50 ° C or higher when discharged. Therefore, it is necessary to discharge the waste water by appropriately lowering the waste water temperature. If our solution is used, the effect of temperature rise of process water as well as wastewater cooling effect can be expected
The temperature of the industrial water required to clean the substrate stably in the manufacturing process of the electronic substrate is not as high as about 25 ° C. However, in the winter season, the fuel is used due to the low industrial water temperature of 0 to 3 ° C. At this time, temperature of the waste water is about 20 ℃, and the temperature rise effect of about 15 ℃ can be expected.
In the accommodations, the shower water of the guests occupies a large part in the use of hot water. In general, hot water at 35 ° C is required and the temperature rise effect of about 10 ° C can be expected through wastewater discharged to 30 ° C
A sports center with a swimming pool requires a considerable amount of hot water, including water for swimming pools, including shower water. It uses fuel for hot water supply of the shower as well as maintaining a constant water temperature of about 27 ° C. Utilizing wastewater at 30 ℃, it is possible to save fuel in both swimming pool and shower in winter and warming effect of hot water can be expected in summer.