Utilization of waste heat sources to lower energy consumption at a paper mill
Wentin, Evelina (2022)
2022
Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2022051034135
https://urn.fi/URN:NBN:fi-fe2022051034135
Tiivistelmä
The environmental impact has become an important aspect to consider for companies. Energy efficiency is a significant part of the environmental impact that is continuously improved. New solutions are found to increase the energy efficiency and at the same time decrease the energy costs. The use of waste heat sources can be an efficient way to decrease the use of primary energy.
The focus of this work has been to identify waste heat sources that could be used to heat office and production spaces at a paper mill. Three different waste heat sources have been evaluated for the purpose of replacing district heating with waste heat from the process. The different waste heat sources considered was moist air from the dryer section, process wastewater and hot air from turbo blowers. The plan is to build a parallel heating system and the goal is to replace as much as possible of the district heating used. However, it was found that the waste heat from the wastewater or a combination of the air from turbo blowers and the wastewater could cover the entire heating demand even on the colder winter days. An evaluation of the different waste heat sources as well as a sensitivity analysis have been conducted.
The focus of this work has been to identify waste heat sources that could be used to heat office and production spaces at a paper mill. Three different waste heat sources have been evaluated for the purpose of replacing district heating with waste heat from the process. The different waste heat sources considered was moist air from the dryer section, process wastewater and hot air from turbo blowers. The plan is to build a parallel heating system and the goal is to replace as much as possible of the district heating used. However, it was found that the waste heat from the wastewater or a combination of the air from turbo blowers and the wastewater could cover the entire heating demand even on the colder winter days. An evaluation of the different waste heat sources as well as a sensitivity analysis have been conducted.