Field trial system for chemical industry

Use of the waste heat from an acid splitting plant

In January 2013, the second field trial system was commissioned in the Worms plant of Evonik Industries. Here, the source of waste heat for the ORC process is cooling air from an acid splitting plant (for the manufacture of sulphuric acid), which has a maximum temperature of 350°C.

The distinguishing characteristics of this installation are its integration into a complex industrial production process with demanding safety requirements and the fact that it was installed and passed the acceptance test within an exceptionally short period, i.e. less than four months.

Because of the cramped spatial circumstances, the compact 30 ft container and the evaporator had to be installed at a distance of 20 metres apart. Furthermore, these components were designed to be mobile, so that they can be completely removed every two years for the purpose of maintenance work on the industrial equipment. This takes no more than two days.

Because the heat from the ORC condenser can no longer be used in a heating circuit, an ethanol air condenser is being used for the first time. Even for summer operation at 35°C, this has been designed for an output of 125%, in case a possible replacement of the ORC medium has to be undertaken, and a higher condenser output is required. 

Use of the waste heat from an acid splitting plant

In January 2013, the second field trial system was commissioned in the Worms plant of Evonik Industries. Here, the source of waste heat for the ORC process is cooling air from an acid splitting plant (for the manufacture of sulphuric acid), which has a maximum temperature of 350°C.

The distinguishing characteristics of this installation are its integration into a complex industrial production process with demanding safety requirements and the fact that it was installed and passed the acceptance test within an exceptionally short period, i.e. less than four months.

Because of the cramped spatial circumstances, the compact 30 ft container and the evaporator had to be installed at a distance of 20 metres apart. Furthermore, these components were designed to be mobile, so that they can be completely removed every two years for the purpose of maintenance work on the industrial equipment. This takes no more than two days.

Because the heat from the ORC condenser can no longer be used in a heating circuit, an ethanol air condenser is being used for the first time. Even for summer operation at 35°C, this has been designed for an output of 125%, in case a possible replacement of the ORC medium has to be undertaken, and a higher condenser output is required.