The available heat is calculated from waste heat stream conditions: temperature and flow rate or heat capacity. You have the option to choose between two different fluid options.
The objective of the AHT is to recover a waste heat source and upgrade its temperature, so that this can become reusable again in an industrial process. The operating temperature of this process is therefore required.
On one hand, it is required to define the number of operation hours of the process where the waste heat is obtained. As the number of operation hours of this process increases, so does the energy that can be revalorized, and this yields to better technical and economic feasibility results. In addition, it is necessary to define the simultaneity between available waste heat and process heat where revalorized stream would be reused, being the 100% the best scenario.
Data of your current heat supply is needed to determine the energy savings associated to the implementation of AHTs in your process. Different options are suggested. The overall efficiency of your current heat supply source is also required. In case you are not sure, an efficiency is suggested for each type of heat source.
Costs of electricity and fuel as well as CO2 factor are suggested for a number of countries. Alternatively, you can enter manually these costs and factors.
It is interesting that the user understands the effects that the outlet temperature has on the financial feasibility of the AHT implementation to their industrial process. Thus, the figure below provides the resulting payback and COPth for the set AHT outlet temperature and for three additional temperatures closed to the value set by the user (set outlet temperature -5, -10 and -15 °C).
*When no country data is available the EU28 average value is given