Introduction to Sustainable Urban Renewal05

Introduction to Sustainable Urban Renewal05 - 75 5...

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[ 75 ] 5.1 Introduction This chapter addresses the first case study: Oedevlietsepark in Hoogvliet, Rot- terdam. It adopts a broad angle, approaching sustainability from the perspec- tive of energy-saving potential and the extension of functional life-cycle. It also recognizes the importance of sustainability as a theme in the planning process. We shall discuss several renovation solutions, energy-saving poten- tial and the subsequent costs, sustainability ambitions in the planning process, and experience of performance agreements in the planning process. Section 5.2 concentrates on the improvement of energy efficiency and the costs. In Section 5.3 we discuss the extension of the functional life-cycle in the context of the case study. Section 5.4 deals with the planning process for Oedevlietsepark and Section 5.5 describes the input from the sustainability ambitions of the different players in the planning process. Section 5.6 describes the experience of performance agreements and Section 5.7 con- cludes with a section on performance agreements for sustainable building. 5.2 Energy-efficient renovation We chose a building on Koolvisweg, which is typical of the buildings in Oede- vlietsepark, as a case study in our examination of energy-efficient renovation solutions that can reduce CO 2 emissions. The field of study is presented in Chapter 3. An energy evaluation was conducted using the Energy Perfor- mance Advice programme ( Energie Prestatie Advies, EPA ). The calculations were subject to the following assumptions and constraints: n The cavity walls have a structure of double-brick or a combination of brick and reinforced concrete. Extra insulation and boards have been installed in some parts of the facade in earlier renovations in order to prevent cold bridges and heat losses. There is no cavity insulation and neither the roof nor the floors are insulated. The ground floor is unheated space which is used for storage. The main facade faces south-east. n Double glazing was installed in an earlier renovation. n The energy demand is dominated by the use of natural gas for heating the living space. Natural gas is also used for hot water and cooking while elec- tricity is used for other energy services. The buildings have natural ventila- tion. It is assumed that all the dwellings are heated with local gas systems and that tap water is heated by an the instantaneous boiler in the kitchen. n The estimated annual average indoor temperature is 15 degrees. n A three-bedroom apartment is presumed to accommodate four residents and a two-bedroom apartment three. The calculations for the investment costs and payback time are based on the 5 Oedevlietsepark, Rotterdam
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[ 76 ] following assumptions: n The estimated investment for the renovation is low as it is assumed that similar renovations are carried out in more than 50 dwellings (the selected building type in Oedevlietsepark has 26 dwellings, meaning that at least two apartment blocks are renovated at the same time). n
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Introduction to Sustainable Urban Renewal05 - 75 5...

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