Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Paolo Rosato, University of Trieste (IT) “Managing economic analysis of building envelope ”

34 views

Published on

The Future Envelope 12
Interreg IT-AU FACEcamp project
------------
Conference on Building Envelopes
20-21 May 2019, NOI Techpark, Bolzano (Italy)
"It’s all about performances".

Published in: Technology
  • DOWNLOAD FULL BOOKS, INTO AVAILABLE FORMAT ......................................................................................................................... ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/y3nhqquc } ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .............. Browse by Genre Available eBooks ......................................................................................................................... Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult,
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

Paolo Rosato, University of Trieste (IT) “Managing economic analysis of building envelope ”

  1. 1. The Future Envelope 12 It’s all about performances The Economic Analysis of Building Envelope: Private and Public Perspectives Paolo Rosato DIA -UNITS www.interreg.net FACEcamp final event | Bolzano, 20-21 May 2019 FACEcamp is funded by European Regional Development Fund and Interreg V-A Italy-Austria 2014-2020.
  2. 2. Summary • The economic point of view • Buildings quality and welfare • Values and envelope • Two case studies: - Economic and environmental simulation of building energy refurbishment - Green Roofs vs. Cool Roofs: Economic evaluation of private and public benefits The Future Envelope 12 final event 20-21 May 2019, Bolzano
  3. 3. The economic point of view In current language the word "economic" seems "prosaic" and limited to the practical and material sphere, devoid of poetry and of ideal tensions. In reality, if we look to the origin of economic science, the concept is different and is linked to the study of solutions to improve the satisfaction of human needs from a practical point of view. From this point of view it should be noted that the well-being of a community depends essentially on the tangible and intangible goods and services, namely: • from the goods and services that bought with the income; • from the utilities that the natural, social and institutional environment provides for free. The Future Envelope 12 final event 20-21 May 2019, Bolzano
  4. 4. The economic point of view In other words: The Future Envelope 12 final event 20-21 May 2019, Bolzano  , ,U f R P Q Utility Income Price of private (market) goods Non-market (public) goods and servicies U R P Q    
  5. 5. The economic point of view But, there are market (private) goods capable of influencing the quality and extent of free goods and services: The Future Envelope 12 final event 20-21 May 2019, Bolzano   1 , ; ( , ) n i i k x i U R p x Q g xMax          X Q Q = Market goods Q= Non-market goods and servicies = Income Prices of market goods Market goods that influence Q = Other non-market goods and servicies Prices of x i k k k X R p x p    Q
  6. 6. Building quality and welfare Normally these goods (xk, mixed goods): • have a market value (pk) that depends on the quality of the surrounding environment (Q); • affect the value of surrounding goods. The most striking example are the buildings: • their value strongly depends on the quality of the location (≈ 30% variability); • the quality of the location depends, in turn, on the quality of the buildings. Moreover, from a dynamic point of view, the buildings have the capacity to shape over time, both positively and negatively, the built environment: • a growing quality of the building generates a positive trend of real estate value; • a decreasing quality generates a negative trend into the real estate value. The Future Envelope 12 final event 20-21 May 2019, Bolzano
  7. 7. Building quality and welfare The buildings value dynamics are very important because the "built environment” plays an crucial role in social welfare, since: • it absorbs a significant slice of income (30% on € 2.5k / month); • constitutes the major part of the family assets (60% of € 10 bn); • occupies about 5% of the national soil (10% excluding the forests) The Future Envelope 12 final event 20-21 May 2019, Bolzano
  8. 8. Building quality and welfare The buildings, especially the larger ones located in mixed urban contexts (residential / tertiary / productive) are paradigmatic objects to be analysed from the economic point of view "latu sensu" because they have a: • private value, which derives from direct use and is represented monetarily by rent and / or capital value; • option value, linked to the persistence of the use value over time due to their flexibility / adaptability to known and unknown future uses; • "external" value generated by the factors that influence the well- being of the community and the value of the surrounding real estate. The Future Envelope 12 final event 20-21 May 2019, Bolzano
  9. 9. Values and envelope Among the various physical components of the building, the envelope, although not very important in the construction cost (10-20%), is among the most significant because: • it affects some important technical-economic performances (summer and winter energy consumption, durability, etc.); • it is the «business card» of the building towards the market and influences its rental and market value; • It is a link between the object in a private sense and the surrounding environment and conditions the sign and the extent of its perception in terms of value and externalities. The Future Envelope 12 final event 20-21 May 2019, Bolzano
  10. 10. Economic and environmental simulation of building energy refurbishment Research Group: Marco Manzan (coordinator), Giorgio Lupato, Amedeo Pezzi, Paolo Rosato, Alberto Clarich Research goal: Investigate the influence of a stochastic variation of economic parameters in optimizing energy refurbished of a social housing building applying different internal insulation layers to the walls and the replacement of existing windows with more efficient ones. The optimal solutions are searched considering two objective functions related to the energy performance and economic feasibility of the intervention. The Future Envelope 12 final event 20-21 May 2019, Bolzano
  11. 11. Economic and environmental simulation of building energy refurbishment The case study: The energy retrofit of a social house building in Trieste, built in the sixties. The Future Envelope 12 final event 20-21 May 2019, Bolzano
  12. 12. Economic and environmental simulation of building energy refurbishment The case study features: • Four blocks • Four floors • Two small apartments per floor • No insulation and single-layer glass with high thermal transmittance The simulations: • Different insulation performances of opaque walls • Different thermal and solar performances of windows The Future Envelope 12 final event 20-21 May 2019, Bolzano
  13. 13. Economic and environmental simulation of building energy refurbishment The simulation workflow The Future Envelope 12 final event 20-21 May 2019, Bolzano
  14. 14. Economic and environmental simulation of building energy refurbishment The economic valuation The Future Envelope 12 final event 20-21 May 2019, Bolzano 0 j r n i i n i f
  15. 15. Economic and environmental simulation of building energy refurbishment The economic valuation The Future Envelope 12 final event 20-21 May 2019, Bolzano Assuming: • a constant (S) Sj • an increasing annual operating cost (energy) (real rate re)
  16. 16. Economic and environmental simulation of building energy refurbishment Stochastic simulations: • Investment cost (IC) • Future energy price trend (re) Optimization: • Minimize primary energy consumption (PE) • Maximize NPV with 90% probability to be exceeded (risk adverse DM) The Future Envelope 12 final event 20-21 May 2019, Bolzano
  17. 17. Economic and environmental simulation of building energy refurbishment Pareto efficient frontiers (Northern façade) The Future Envelope 12 final event 20-21 May 2019, Bolzano Constant investment cost Stochastic investment cost
  18. 18. The Future Envelope 12 final event 20-21 May 2019, Bolzano Synthesizing: 1. The optimization leads toward solutions with different choices between north and south facades; 2. Introduction of variability in investment cost leads to the selection of more performant windows type respect the constant cost; 3. The risk aversion of the decision maker influences the 4. The Pareto efficient technological solutions show that is possible to improve significantly the economic performances of the retrofit investment with little improvement of primary energy consumption. Economic and environmental simulation of building energy refurbishment
  19. 19. Green Roofs vs. Cool Roofs: Economic evaluation of private and public benefits of industrial buildings retrofit The Future Envelope 12 final event 20-21 May 2019, Bolzano Research Group: Paolo Rosato (coordinator), Raul Berto, Carlo Stival, Edino Valcovich Research goal: Green roofs (GRs) represent an interesting option for industrial buildings refurbishment, providing several private and social benefits. The research performs a probabilistic Cash Flow Analysis (CFA) and Cost- Benefit Analysis (CBA) to evaluate private and social benefits and costs in industrial areas of extensive GRs compared to Cool Roofs (CRs), in order to define sustainable policy and economic measures to encourage GRs diffusion in three different Italian climate contexts.
  20. 20. Green Roofs vs. Cool Roofs The Future Envelope 12 final event 20-21 May 2019, Bolzano Specific objectives: • Evaluate the convenience from the owner's point of view to replace the conventional roof with an extensive green roof in various climate conditions; • Evaluate the public / social convenience to the spread of extensive green roofs; • Evaluate the efficiency/efficacy of incentive policy for the spread of extensive green roofs.
  21. 21. ENVIRONMENTPARK,TORINO(I), E.AMBASZ,B.CAMERANA,G.DURBIANO The Future Envelope 12 final event 20-21 May 2019, Bolzano An Extensive Green Roofs
  22. 22. LIBRARYOFUNIVERSITYOFTECHNOLOGY,DELFT(NL) The Future Envelope 12 final event 20-21 May 2019, Bolzano Another Extensive Green Roofs
  23. 23. The Future Envelope 12 final event 20-21 May 2019, Bolzano Green Roofs vs. Cool Roofs……… Green Roof Cool Roof Existing rooftop
  24. 24. The Future Envelope 12 final event 20-21 May 2019, Bolzano ……..in different climate
  25. 25. Green Roofs vs Cool Roofs The Future Envelope 12 final event 20-21 May 2019, Bolzano Methods: • Cash Flow Analysis (CFA) for private benefits evaluation; • Cost benefit Analysis (CBA) for public/social evaluation. The study evaluates, for each settlement: • Construction and maintenance costs for CR and GR solutions; • Costs associated to heating and cooling services, with both CR and GR solutions, through probabilistic (Montecarlo) simulation of energy performances in each climate condition; • Monetization for both CR and GR externalities.
  26. 26. Private costs and benefits comparison The Future Envelope 12 final event 20-21 May 2019, Bolzano Private costs and benefits Roof Unit value [€/m2 ] Trieste Ancona Palermo Construction costs Green 140.88 140.88 140.88 Cool 81.39 81.39 81.39 Energy consumption per year Green 3.65 3.65 3.52 Cool 4.02 3.70 3.44 Maintenance costs per year Green 2.00 2.00 2.00 Cool 2.86 2.86 2.86 GR vs CR NPV (r=4%) -34,69 -37,86 -38,33
  27. 27. Private costs and benefits plus externalities comparison The Future Envelope 12 final event 20-21 May 2019, Bolzano Externalities Roof Unit value [€/m2] Trieste Ancona Palermo Landscape aesthetic benefit Green 48.98 104.30 85.60 Biodiversity preservation per year Green 3.40E-03 1.00E-03 7.60E-05 Carbon emission reduction per year Green 0.23 0.23 0.18 Cool 0.26 0.23 0.18 Air quality improvement per year Green 0.13 0.13 0.13 Sewage control per year Green 1.20E-02 1.10E-02 7.00E-03 Cool 3.30E-03 3.30E-03 2.20E-03 Reduction of drained stormwater volume per year Green 9.20E-03 2.00E-02 1.20E-03 Cool 3.00E-03 6.50E-03 4.40E-03 Reduction of stormwater infrastructural costs per year Green 1.70E-02 1.80E-02 3.50E-02 Cool 5.70E-03 6.10 E-03 1.30E-02 GR vs CR NPV plus Externalities (r=3%) 12,28 54,48 38,38
  28. 28. The value of externalities The Future Envelope 12 final event 20-21 May 2019, Bolzano The landscape positive externality was quantified with the willingness to pay a higher price for the houses with a view on industrial sites with Green Roofs rather than with Cool Roofs
  29. 29. The Future Envelope 12 final event 20-21 May 2019, Bolzano Synthesizing: 1. The private NPV shows little convenience in adopting a green roof instead of a cold roof; 2. The social NPV shows a clear advantage in adopting a green roof instead of a cold roof; 3. Social convenience is mainly due to the positive improvement in the landscape and its effect on the value of surrounding real estate assets. Green Roofs vs Cool Roofs
  30. 30. Thank you for your attention! www.interreg.net Paolo Rosato DIA - UNITS paolo.rosato@dia.units.it FACEcamp is funded by European Regional Development Fund and Interreg V-A Italy-Austria 2014-2020.

×