PlusEnergy
PlusEnergy is a term used in building design to describe a structure that produces more energy than it uses. The term was coined in 1994 by Rolf Disch when building his private residence, the Heliotrope as the first PlusEnergy house in the world. Disch then went on to refine the concepts involved with several more projects built by his company Rolf Disch Solar Architecture in order to promote PlusEnergy for wider adoption in residential, commercial and retail spaces. Disch maintains that PlusEnergy is more than just a method of producing environmentally-friendly housing, but also an integrated ecological and architectural concept. As such, PlusEnergy is intended to be superior to low-energy or zero-energy designs such as those of Passivhaus.
The PlusEnergy approach uses a variety of techniques to produce a building that generates more energy than it consumes. A typical example is to capture heat during the day in order to reduce the need to generate heat over night. This is achieved using large North and South facing window areas to allow sunlight to penetrate the structure, reducing the need for energy use from light bulbs. Triple-paned windows (U-value = 0.7) trap this heat inside, and the addition of heavy insulation then means the structure is already warm in the evening and therefore needs less heating. In the Sun Ship, a 60,000 sq ft (5,600 m2) commercial, retail and residential PlusEnergy structure, techniques such as phase changing materials in the walls and vacuum insulation are also used. This permits maximum availability of floor space without compromising efficient insulation.
An important part of the PlusEnergy approach that differentiates it from similar concepts is that the owner or tenant of a PlusEnergy building should be able to live and work comfortably in it without sacrificing lifestyle or normal living standards. For example, solar panels are made aesthetically pleasing so that they are integrated into the façade of the structure. This reflects PlusEnergy's emphasis on community planning and integration, with aspects of transportation, water management and communication also being seen as part of the design.
PlusEnergy design also emphasises the importance of sustainable development on communities in general. An energy-efficient community is seen as generating positive identification and community pride. Rolf Disch says he attracts a high quality of tenant, innovative undertakings and creative work places through his designs. Ecological urban planning techniques like traffic management with wide, attractive walkways, bicycle routes and connections to public transportation are all part of the PlusEnergy ideal. At the Solar Settlement for example, tenants and owners incorporate bicycle and car-sharing, and the neighborhood has an extensive car-free zone with many public transportation connections.
...
Wikipedia