Use of Heat from Wastewater

Use of Heat from Wastewater

Use of Heat from Wastewater

By K. Hrabová, T. Hrdlička, M. Tlašek

Abstract :

There are increasing demands on energy efficiency in all areas of life e.g. heating, cooling, and hot water supply. Using wastewater is meeting requirements of sustainability and environmental protection. Wastewater has great energy potential. The article deals with the optimization of the sewer heat exchanger and economic efficiency. Heat exchanger effect is depending on the shape and geometry of heat exchanger. Also, the temperature of wastewater affects heat exchanger effect. Usual temperature of sewage is about 20 degrees Celsius in summer and about 10 degrees Celsius in winter. Cooling for a maximum of about 1 degree Celsius and flow at least 10 litters per second is required for seamless operation. To pass the requirement of minimum flow is this system suitable for bigger buildings. It is also necessary for a positive economic effect. For proper design and optimization, it is necessary to use three basic methods: diagnostics, heat balance calculations and modeling. Numeric simulations are made for the selection of the best sewer heat recovery. Recovered heat energy was used for heating, cooling also for hot water supply. The positive economic effect is provided in the case study of the administrative building.

IOP Conference Series: Earth and Environmental Science, Volume 290, conference 1

Citation: K. Hrabová et al 2019 IOP Conf. Ser.: Earth Environ. Sci. 290 012095

DOI: 10.1088/1755-1315/290/1/012095

Source: IOP Science