Milano (MI), Italia

Hines Bergognone 53

he renovation of the former Post Office complex at number 53 Via Bergognone in the Porta Genova area of Milan, is the outcome of an international competition held by the Hines Real estate company.

The complex is located in an area with a high concentration of disused industrial buildings, between the Navigli canals, the ring road and the suburbs. The complex consists of four office buildings dating from the 1960s and 1970s that enclose a central courtyard. The total area of the complex is about 25,000 m2.

The four buildings are considered as a single urban block and the interventions include maintaining the existing volume, rationalising the functionality of the layout, and updating the overall design by replacing the windows, creating double-height spaces and making a new courtyard garden.

The main intervention is centred on the nine storey building facing onto Via Bergognone (to the west), adding a new transparent shell to give a contemporary, unified appearance. The new facade is based on a system of large glass plates corresponding to the modular structure of the block. On the south-west side, which is more exposed to the sun, a second skin has been added at a distance of 60 cm from the façade. This is made from selective glass and serves as both a screen and a filter for the suns rays, thus reducing their impact and the need for air-conditioning. This architectural and material choice integrates with the design of the mechanical systems for more efficient use of energy and a reduction of running costs. The use of chilled beams (partly integrated into the lighting units and partly into the ceiling), along with the ventilation system, ensures optimum cooling and thermal comfort in the office spaces.

Part of the building on Via Tortona was demolished to make a new main entrance to the complex. This intervention creates new urban scenery and perspectives that lead directly to the inner garden. The courtyard is surfaced in stone and is terraced to create an effect of superimposed gardens. It is partially covered by a glass canopy and represents a single space overlooked by the entrance halls of the individual buildings. The canopy, which is a catenary structure, is designed as a thin layer of scales of glass over which rain water can flow.

The energy assessment of the Hines complex was undertaken in two stages. The first was during the concept stage, when three-dimensional simulations were made using Ecotect software (developed by Prof. Andrew Marsh and distributed by the University of Cardiff). These concentrated in particular on the orientation of the façades and their exposure to the summer sun. Solar analysis determined which façades were most exposed and to what extent, and the degree of shading necessary for the inner courtyard. The second stage, during the detail design phase, consisted of an economic and energy assessment to determine both winter and summer energy consumption and to quantify energy savings due to advanced plant and technological solutions.

The data resulting from this analysis shows that the global energy consumption per m2 for building A (the building on Via Bergognone) is 145 kW/ m2. This figure is significant for the project strategy employed for this building. The use of double glazed façades with selective glass integrated with the double skin gives a U value of 1.4. A standard façade without double glazing and a double skin would have a U value of 2.5. In this project every design decision contributes to a reduction in energy consumption: a double skin, selective glass, insulation, chilled beams for cooling, associated with a philosophy of contemporary architectural design. A building of the same size using standard materials would have an energy consumption of 280 kW/ m2.

This project received funding from the Lombardy Region for the creation of a photovoltaic plant as part of the 10,000 photovoltaic roofs incentive.

For this and other projects, Mario Cucinella has received in 2005 the Energy Performance + Architecture Award.

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Stampa

Pubblicato da

Mario Cucinella Architects S.r.l.

Pubblicato il

12 Luglio 2007

Capogruppo

Mario Cucinella Architects S.r.l.

Fotografie

Daniele Domenicali, Ornella Sancassani

Collaboratori

Altri Collaboratori

Fabio Andreetti, Andrea Gardosi, Elena Lavezzo, Matteo Lucchi, Enrico Contini, Manuela Carli

Gruppo di progettazione

Mario Cucinella, Elizabeth Francis, David Hirsch, Filippo Taidelli, Francesco Barone, George Frazzica, Vincenzo Di Serio, Cristina Garavelli, Roberta Grassi, Valeria Salvaderi, Enrico Iascone, Celestina Savoldi, Filippo Meda

Grafica

Consulenti

Strutture

Rocco Iascone, Luca Turrini, Claudia Montevecchi, Iascone Ingegneri

Impianti

Ove Arup & Partners, Studio Isoclima, A&T Systems

Costruzione

Appaltatore generale

Impresa generale: Bergognone Scarl (Consorzio Cile-Pedercini),

Fornitori

Serramenti e facciate: C.N.S. Spa, Copertura in vetro: Longianese Srl, Strutture di copertura: Odine Manfroni MEW,Servizi elettrici e meccanici:

Dati tecnici

Cliente

Hines Italia

Dimensioni

Superficie lorda edificata

25000

Progetti degli stessi Autori

Um Al Nasser, Palestinian Territory

La terra dei bambini

ARCò, Mario Cucinella Architects S.r.l., Luca Trabattoni, Diego Torriani, Valerio Marazzi, Alessio Dionigi Battistella, Alberto Alcalde

Aosta (AO), Italia

Recupero ex Caserma Testafochi

Mario Cucinella Architects S.r.l., Studio Pession Associato, Tetrastudio Architetti Associati, Studio Rosset Associati, Sintecna Srl, Giuseppe Amaro, Golder Associates srl