WP3: Added value of innovative energy-efficient renovation solutions

Objectives: This WP features the development and optimization of innovative technical solutions for reduction of the energy use in existing buildings with a special focus on the added value created by the solutions in terms of architectural transformation and improved indoor climate. The outcome is used to generate knowledge to the development of the total value model in WP1.

Description of work: The WP is divided into three tasks where the first two focuses on quantifying and optimizing added values as a consequence of energy-efficient building renovation solutions. The third task brings special attention to development of smart building energy system management, which potentially leads to energy savings, energy flexibility and improved indoor climate. All tasks involves studies of 1:1 renovation project developed and conducted by partners involved in this task.

Task 3.1: The added value of improved indoor climate generated by energy-efficient renovation solutions

This task aims to demonstrate that the value of improved indoor climate due to very energy-efficient renovation of the building envelope and services can be quantified and optimised. The renovation solutions for building envelope and services are based on existing technology. The reason is that a vast amount of available components for energy efficient building renovation are already highly energy-efficient, and the remaining potential for improved energy-efficiency is thus marginal, expensive or still an object to research . The current challenge is instead to combine current components into very energy-efficient total solutions with added values like improved thermal comfort and daylight conditions in a cost-efficient manner. The partners in this task seeks to identify and demonstrate performance of such solutions in close collaboration with the activities in WP2 that seeks to improve the cost-effectiveness of renovation though innovation in construction processes (see WP2). A specific focus is on proposing and testing solutions energy-efficient, comfortable and healthy ventilation in existing dwellings. In general, mechanical ventilation with heat recovery is considered an important measure to reduce the energy use in existing buildings. This solution will also improve indoor air quality. However, hybrid ventilation is considered to be the next natural step after mechanical ventilation to increase energy savings. This requires ICT communication between ventilation units and automatic window opening systems – a concept developed and tested in this task in close collaboration with task 3.3.

Task 3.2: The added value of architectural transformation generated by energy-efficient renovation solutions

The RE-VALUE project address’ the hypoteses that added value in building renovation projects can be described through a holistic assessment framework considering all factors in the built environment, i.e. technical, utility, cost, and architecture. The technical factors and theirs relationship to each other are considered in WP2 and WP3.1, however for an assessment and evaluation of added value for holistic renovation projects focus all has to be given to the non-technical factors which can be broken down to stakeholder awareness and behavior, ownership structures, legislation, policy and governance, architectural value and cultural heritage. The partners in this task will explore these factors by means of a research approach embedded in the  1:1 demonstration projects. The aim is to explore the development of existing and new technologies into innovative new solutions  for building integration fulfilling important criteria regarding integration of aesthetics, energy savings and commercial successful distribution as a price wise competitive and architectonic convincing alternative to the existing solutions. One PhD affiliated with AU will focus on new architectonic solutions and the integral added value to a renovation project.

Task 3.3: ICT solutions for smart energy management.

Development and testing of a novel ICT-based concept for smart energy management. The concept uses sensor technology and online signals from weather forecasts, energy price and requests for demand responses to make economical and energy-efficient building operation. The system can also enable buildings to make demand responses to the future smart grid (electricity) and smart district heating systems, which is essential to a society based on renewable energy only. The concept builds on existing hardware  and software infrastructure. Thus, the hardware only need to be expanded with an air quality sensor and the software only need to be extended with an algorithm facilitating the above described concept.