2013 Climate Change and Regional Response, Dresden:
Regional Thermal Energy Network Based on Waste Energy with Desiccants: Pilot Project within a Climate Envelope
A significant contribution to climate change adaptation can be achieved through using regional resources, which are not assessed till now; for instance through storage and using local waste energy by means of desiccants. Therefore, it is planned to build a new thermal energy network in a developing region in Berlin.
The basic principle is using the waste heat through reduction of water content within liquid desiccants. The emerging hygroscopic potential can be transported, stored and coupled to the latent heat fluxes in air. Following, it can be again regenerated through waste heat resources in the region, thus closing the cycle.
A small scale test- and demonstration unitwill be run in a prototype, so called “climate envelope”, which enables desiccant based acclimatization through solar gains and plants as heat and humidity source. Climate envelope concept bases on a transparent envelope covering the whole building and has three functions, being (1) enhancing the energy efficiency through passive use of solar energy, (2) protection from noise and air pollutants in traffic corridors and (3) additional living spaces. The prototype will be built up in the southern part of Berlin, in order to demonstrate the main technological components of climate envelopes and waste energy usage through desiccants, especially showing the perspective of using vegetation as a means of humid air production in a solar collector system and as a filter element of air and water.
The demonstration prototype will be used as an essential element for demonstrating, evaluating, and facilitating innovative and integrated low-carbon interventions in order to stimulate economic development while lowering carbon footprint through sustainable energy consumption. It will mitigate the impact of climate change and drive forward knowledge on how to create sustainable EU Cities through a systemic neighborhood approach.
2012 Energy Forum Bressanone, Italien:
BIG: Building Integrated Greenhouses
This paper presents a conceptual study of townhouses with integrated greenhouses as a passive solar collector, noise control, and urban farming space in Berlin, Germany. It is based on empirical research of closed greenhouses and desiccant based air de-humidification. Liquid desiccants are used for energy capture from hot and humid greenhouse air as well as for heat accumulation, while also being involved in humidity control and waste heat recovery within the building. Firstly, in the preliminary design phase, a townhouse prototype was developed using energy simulation software. Subsequently, the effect of closed greenhouses on noise control and acclimatization were investigated with respect to the energy use of the prototype building.
The results indicate that building integrated greenhouses (BIG) may provide a more efficient option for solar space heating than state of the art solar thermal technologies. Furthermore, depending on local climatic conditions, it is possible to approximate zero-energy house standards with an accurate architectural design that includes BIG.