the life cycle performance of sustainable renovation concepts

MANAGEMENT SUMMARYSustainability in the built environment is a subject with an increasing economic and socialrelevance. Important aspects of this subject are the continuous increasing use of energy,increasing energy costs, and increasing material use on earth. These aspects result inCO 2 emission and climate change, resource depletion, and financial issues. Theapplication of sustainable renovation is considered to be an effective strategy tocontribute to the transition process towards a more sustainable built environment.However, it is hard to determine which sustainable renovation concept is the mosteffective one for a renovation project. Selecting the most effective sustainable renovationconcept demands the possibility to compare the performances of different concepts witheach other. To determine the performance of a renovation concept, the factors ofinfluence on the performance must be identified.This research focuses on the identification of factors of influence on the performance of asustainable renovation concept. These factors of influence are integrated into a modelthat can be used to determine and compare the performance of a sustainable renovationconcept. The identification of factors of influence and the development of the model arebased on a literature study, an evaluation of existing sustainability assessment tools,expert interviews, and a model testing phase.This research also identifies factors of influence on the market implementation of aninnovative sustainable renovation concept. The identification of these factors of influenceis based on a literature study and expert interviews.The factors life cycle costs, life cycle yields, life cycle environmental impact, quality, andenergy performance coefficient are the five main factors of influence on the performanceof a sustainable renovation concept. Also, boundary conditions influence the performanceof a sustainable renovation concept at a specific project. The identified main factors ofinfluence and the boundary conditions are integrated into a „life cycle performanceevaluation model‟ for sustainable renovation concepts.The factors system change process, adoption of innovation, legislation & rules, process &organization, and technical feasibility are factors of influence on the marketimplementation of an innovative sustainable renovation concept. These identified factorsare integrated into an „implementation model‟ for innovative sustainable renovationconcepts.The developed „life cycle performance evaluation model‟ is applied on a case. This caseconsists of the performance evaluation of the selected renovation alternatives „norenovation‟, standard renovation‟, and „WarmBouwen renovation‟. „WarmBouwen‟ is aninnovative sustainable renovation concept. The model application points out that theWarmBouwen renovation concept scores the best on the factors life cycle yields, life cycleenvironmental impact, quality, and energy performance coefficient at all definedscenarios. WarmBouwen scores better than the alternative „standard renovation‟ at alldefined scenarios on the factor life cycle costs. WarmBouwen scores better than „norenovation‟ at 21 of the 27 defined scenarios.The performance of the WarmBouwen concept can be improved by applying a gas heatpump instead of an electric heat pump, by applying solar energy systems, and byreplacing the existing fixed interior walls of a house by flexible interior walls.6