Optimization of emission reducing energy retrofits in Finnish apartment buildings
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
Details
| Original language | English |
|---|---|
| Title of host publication | CLIMA 2019 Congress |
| Subtitle of host publication | Bucharest, Romania, May 26-29, 2019 |
| Publisher | EDP Sciences |
| DOIs | |
| Publication status | Published - 13 Aug 2019 |
| Publication type | A4 Article in a conference publication |
| Event | REHVA World Congress - Bucharest, Romania Duration: 26 May 2019 → 29 May 2019 |
Publication series
| Name | E3S Web of Conferences |
|---|---|
| Volume | 111 |
| ISSN (Print) | 2555-0403 |
Conference
| Conference | REHVA World Congress |
|---|---|
| Country | Romania |
| City | Bucharest |
| Period | 26/05/19 → 29/05/19 |
Abstract
This study examined the cost-optimality of energy renovation on Finnish apartment buildings of different ages, built according to different energy performance requirements. Multi-objective optimization was utilized to minimize both CO2 emissions and life cycle cost (LCC). IDA-ICE simulations were performed to obtain the hourly heating demand of the buildings. Four building age classes and three heating systems (district heating, exhaust air heat pump and ground-source heat pump) were separately optimized. With district heating, it was possible to reduce emissions by 11%, while also reducing LCC. With heat pumps cost-savings could be achieved while reducing emissions by over 49%. With maximal (not cost-effective) investments, emissions could be reduced by more than 70% in all examined cases. In all cases, the cheapest solutions included solar electricity and sewage heat recovery. In old buildings, window upgrades and additional roof insulation were cost-effective. In new buildings, demand-based ventilation was included in all optimal solutions.