Previous research in this area
Point sources of high -grade and readily dispatchable excess heat from heavy industry have been covered in previous international and national studies like in the Stratego Project.
A previous project from IEA DHC Annex X (Economic and design optimization in integrating renewable energy and waste heat with district energy Systems, 2014) has provided a valuable overview on the integration of renewable energy and waste heat into district energy systems. The project addresses economic, design and operational issues and illustrates a range of examples of integration; it illuminates key design issues associated with such integration; and describes solutions to addressing these issues.
Waste heat potential of specific industry and service sectors are rare topics in studies because of the difficulties how to estimate the waste heat potential of the industrial sector.
But the waste heat potential from sewage water was evaluated in several studies, so that the first important information of the usability of low-grade temperature sewage water is given.
In the European CELCIUS project industrial and urban technical waste heat potential was calculated using statistical data provided by energy agencies for five large European cities.
In the Austrian project HEAT_re_USE the methodology using statistical and real data was adopted to identify and map the heat demand and waste heat potential but focuses only on the city of Vienna, Austria.