Evaluating Deep Retrofit Strategies for Buildings in Urban Waterfronts
The renovation and requalification of existing building stock and the exploitation of renewable energy sources are considered key actions in the European Energy Roadmap to 2050.
In this scope, a noticeable potential application is represented by urban constrained built heritage, whose rehabilitation can be considered both as a strategy for its conservation and an enhancement of competitiveness for a sustainable city.
The proposed research evaluates the potential of scalable retrofit strategies in existing buildings through the exploitation of on-site renewable energy sources available in urban waterfront. The methodology starts with the collection of data concerning environmental and climate conditions, predictable building energy demand for heating and cooling services, and timescales of available on-site renewable energy sources.
The approach has been tested by the development of a detailed building energy model (BEM) for a constrained building in the urban waterfront of Trieste, in Northeastern Italy; the building construction dates back to the early 1980s and it is located in a valuable historical and cultural context. According to the preliminary rehabilitation proposal by Trieste Municipality, a baseline energetic model has been carried out to evaluate and optimize retrofit strategies for building envelope and energy systems, including renewable energy source exploitation.
The study considers particularly hydrothermal energy stored in sea basin that could play a significant role in urban waterfronts contexts. The main results show that the most effective adaptation strategies are characterized by key factors such as envelope thermal inertia in reducing heating and cooling demand in middle seasons, thermal effects of roof greening, and the combination of plants that exploit several discontinuous renewable sources and accumulation systems, such as photovoltaic systems and sea hydrothermal energy.
This paper looks at a strategic vision that focuses the need to manage plant systems through advanced commissioning or by developing an integrated smart thermal grid.
This research is embedded in a pilot project concerning the development of a low-temperature thermal grid in the waterfront of the old town of Trieste.
KeywordsUrban waterfront Hydrothermal energy Mediterranean climate Heritage rehabilitation
- 2.Commission of the European Communities (2005) Green Paper on energy efficiency or Doing more with lessGoogle Scholar
- 3.Italian Government (2004) Legislative Decree n. 42/2004 of the Italian Government. Code of cultural heritage and landscapeGoogle Scholar
- 4.Italian Government (2005) Ministerial Decree n. 192/2005 of the Italian Government. Implementation of Directive 2002/91/CE on energy efficiency in buildingsGoogle Scholar
- 5.Italian Government (2015) Interministerial Decree of the Italian Government 26 June 2015. Application of energy performances calculation methodologies and definition of mandatory prescriptions and requirements of buildingsGoogle Scholar
- 6.Italian Government (2013) Decree-Law of the Italian Government 4 June 2013, No. 63. Urgent provisions for the transposition of Directive 2010/31/UE of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings for the definition of infringement procedures started by European Commission, and other provisions on social cohesionGoogle Scholar
- 7.Friotherm AG, Ropsten V (2005) The largest sea water heat pump facility worldwide, with 6 Unitop® 50FY and 180 MW total capacity. Friotherm AG, WinterthurGoogle Scholar
- 8.Riipinen M (2013) District heating and cooling in Helsinki. In: Proceedings of the international CHP/DHC workshop, Paris, 12–13 Feb 2013Google Scholar
- 9.Friotherm AG (2005) Oslo – Fornebu. Sustainable development with a district heating/cooling system using a Unitop® 28/22CY. Friotherm AG, WinterthurGoogle Scholar
- 11.Mitchell MS, Spitler JD (2012) Open-loop direct surface water cooling and surface water heat pump systems – a review. HVAC&R Res J 19(2):125–140Google Scholar
- 12.Schumacher P (2015) Energy efficiency for Eu historic districts sustainability. Smart management and integration of renewable and energy efficiency solutions. BAU Münich, Münich, 19–24th Jan 2015Google Scholar
- 18.Athienitis A, O’Brien W (eds) (2015) Modeling, design, and optimization of net-zero energy buildings. Wiley, New YorkGoogle Scholar
- 19.Keirstread J, Nilay S (eds) (2013) Urban energy systems: an integrated approach. Routledge, LondonGoogle Scholar
- 21.Iammarino L, Ricci P (Trieste Municipality, 2014) Preliminary project for Ex Meccanografico building renovationGoogle Scholar
- 24.Ezgi C, Ozbalta N (2012) Optimization of heat exchanger cleaning cycle on a ship. J Nav Sci Eng 8:133–146Google Scholar
- 26.Schmidt RR, Fevrier N, Dumas P (2013) Smart cities and communities. Key to innovation integrated solution. Smart Thermal Grids, versionGoogle Scholar