Editorial of the Proceedings of ORC2017: 4th International Seminar on ORC

(1)

ScienceDirect

Available online at Available online at www.sciencedirect.comwww.sciencedirect.com

ScienceDirect

Energy Procedia 00 (2017) 000–000

www.elsevier.com/locate/procedia

Peer-review under responsibility of the Scientific Committee of The 15th International Symposium on District Heating and Cooling.

The 15th International Symposium on District Heating and Cooling

Assessing the feasibility of using the heat demand-outdoor

temperature function for a long-term district heat demand forecast

I. Andrić

a,b,c

_{*, A. Pina}

a

_{, P. Ferrão}

a

_{, J. Fournier}

b

_{., B. Lacarrière}

c

_{, O. Le Corre}

c a_{IN+ Center for Innovation, Technology and Policy Research - Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal}

b_{Veolia Recherche & Innovation, 291 Avenue Dreyfous Daniel, 78520 Limay, France}

c_{Département Systèmes Énergétiques et Environnement - IMT Atlantique, 4 rue Alfred Kastler, 44300 Nantes, France}

Abstract

District heating networks are commonly addressed in the literature as one of the most effective solutions for decreasing the greenhouse gas emissions from the building sector. These systems require high investments which are returned through the heat sales. Due to the changed climate conditions and building renovation policies, heat demand in the future could decrease, prolonging the investment return period.

The main scope of this paper is to assess the feasibility of using the heat demand – outdoor temperature function for heat demand forecast. The district of Alvalade, located in Lisbon (Portugal), was used as a case study. The district is consisted of 665 buildings that vary in both construction period and typology. Three weather scenarios (low, medium, high) and three district renovation scenarios were developed (shallow, intermediate, deep). To estimate the error, obtained heat demand values were compared with results from a dynamic heat demand model, previously developed and validated by the authors.

The results showed that when only weather change is considered, the margin of error could be acceptable for some applications (the error in annual demand was lower than 20% for all weather scenarios considered). However, after introducing renovation scenarios, the error value increased up to 59.5% (depending on the weather and renovation scenarios combination considered). The value of slope coefficient increased on average within the range of 3.8% up to 8% per decade, that corresponds to the decrease in the number of heating hours of 22-139h during the heating season (depending on the combination of weather and renovation scenarios considered). On the other hand, function intercept increased for 7.8-12.7% per decade (depending on the coupled scenarios). The values suggested could be used to modify the function parameters for the scenarios considered, and improve the accuracy of heat demand estimations.

Peer-review under responsibility of the Scientific Committee of The 15th International Symposium on District Heating and Cooling.

Keywords: Heat demand; Forecast; Climate change

Energy Procedia 129 (2017) 1

Peer-review under responsibility of the scientific committee of the IV International Seminar on ORC Power Systems. 10.1016/j.egypro.2017.09.246

10.1016/j.egypro.2017.09.246 1876-6102

Available online at www.sciencedirect.com

ScienceDirect

Energy Procedia 00 (2017) 000–000

www.elsevier.com/locate/procedia

Peer-review under responsibility of the scientific committee of the IV International Seminar on ORC Power Systems.

IV International Seminar on ORC Power Systems, ORC2017

13-15 September 2017, Milano, Italy

Editorial

The Proceedings of the IV International Seminar on Organic Rankine Cycle (ORC) Power Systems gather original contributions to the field of ORC power systems from both academia and the industry, which were presented as either oral or poster contributions during the 2017 edition of the seminar. The ORC 2017 seminar took place in Milano in September, from the 13th to the 15th, 2017. The seminar was hosted by Politecnico di Milano, where the pioneering work on ORC power system of prof. Angelino started in the early 70’s.

Since the first edition of 2011 in Delft, the International Seminar on Organic Rankine Cycle Power Systems established itself as the reference technical conference on ORC power systems. The following successful editions in Rotterdam in 2013 and in Brussels in 2015 contributed to disseminate the knowledge on the fundamentals and technical aspects of this fascinating field and to strengthen the link between academia and the industry.

The ORC International Seminar provides a unique preview on the latest technologies and ideas on ORC power systems. A key feature of the seminar is the interplay between academic and industrial delegates, fostering collaborations and dissemination of new ideas and technical solutions. The industrial day presentations, followed by a lively roundtable, allow all key players in the field to share diverse experiences and to set the basis for future developments.

All papers gathered in the proceedings of ORC 2017 were peer-reviewed, following a revision process involving three reviewers for each paper and two rounds of review. Out of the 232 submitted abstracts, 149 papers were accepted for publication on Energy Procedia: 99 were presented as oral communications during parallel sessions and 50 were presented as posters during the poster session on the first day.

The international character of the ORC 2017 seminar is testified by the source of presented papers, with 149 publications in Elsevier Energy Procedia from hundreds of authors from over 25 different countries.

The Organising Committee would like to thank all members of the Scientific Committee and to acknowledge the unfailing work of the Reviewers, who submitted over 500 reviews and contributed to the high quality of the accepted papers and presentations. The help of SciConf in organising the seminar is also warmly acknowledged. It was our pleasure and privilege to edit the following Proceedings of the IV International Seminar on Organic Rankine Cycle (ORC) Power Systems, which present the state-of-the-art of ORC technology to the community and nicely summarise the efforts of all delegates towards a cleaner world propelled by renewable energies.

Prof. Vincenzo Dossena (Conference Chair) Prof. Alberto Guardone (Review Chair) Prof. Marco Astolfi (Technical Program Chair)