Refine
Year of Publication
Document Type
- Conference Object (13)
- Report (3)
- Peer-Reviewed Article (1)
- Book (1)
- Part of a Book (1)
- Working Paper (1)
Language
- English (20) (remove)
Bad Hersfeld is a small city with about 30.000 inhabitants situated in the middle of Germany. Climate Protection has been on the political agenda in Bad Hersfeld since quite a while. In 1997 the Wuppertal Institute elaborated a first energy and CO2 balance for the city, which was updated in 2007. With the compilation of the CO2 balance it was shown that the emissions in Bad Hersfeld almost stayed at a constant level between 1997 and 2006.
The result was sobering for the local authority. Although some single measures had been implemented, there was no improvement of the CO2-balance.
It was concluded that a successful climate protection strategy needs a comprehensive concept comprising all sectors and a periodic monitoring. Bad Hersfeld commissioned the Wuppertal Institute to develop feasible measures to reduce the CO2 emissions drastically and instruments to overcome existing barriers. In a close cooperation with the City Council and the local municipal utility a climate protection concept was compiled that is rather ambitious for a city of this size.
In consideration of the regional peculiarities12 concrete measures and 7 accompanying measures build the core of the concept with a main focus on energy efficiency (final energy), combined heat and power (CHP) and renewable energies. Another important part of the concept is a municipal support programme to develop the endogenous efficiency potentials and renewable energies in the region. Further to these planning instruments, information and networking activities are compiled as well as a variety of suggestions for a climate protection marketing (Wagner 2008).
Some of these measures that were developed in an iterative and cooperative process between the responsible actors in Bad Hersfeld and the Wuppertal Institute are transferable to other cities and towns. The impeding factors in Bad Hersfeld like the user-investor dilemma, the low capital of small housing associations or the large stock of listed historical buildings, are typical for cities of this size.
The efficiency strategy to exploit the potential for energy savings in buildings still is applied rather slowly in most countries. In addition, there are indications that energy savings are partly compensated particularly by wealth but also rebound effects, the "empty nest" (persistence of elderly people and couples in family homes), and cohort effects (e.g. vintages of people or buildings). In Germany, as in other European countries, the existing trend in housing is a continuously growing floor space per capita. Over the last decades it expanded from about 20 m2 in 1960 to currently 45 m2 per person. Forecasts expect a further increase to more than 50 m2 per person. Obviously, more floor space needs more energy for space heating and cooling, ventilation, and lighting, but it also allows the household to operate more and or bigger appliances, all of which increase energy consumption.
On the other hand, housing projects emerge offering relatively small private living spaces in combination with various shared spaces to use. Many of them are based on private initiatives. But what is the motivation behind it? And is there a higher need for new living concepts in the future?
The proposed paper presents main drivers of increasing floor space per capita in Germany and discusses the question if more space is necessary for higher comfort. It presents different examples of housing concepts that strive to achieve good living with less space and suggests a "building typology of sufficiency".
Finally, the paper discusses qualitatively to which extent these housing concepts can lead to less energy use and emissions. In this way sufficiency could be best friend with efficiency and tackle wealth, rebound, and other effects that counter-act efficiency progress. But therefore, as the paper concludes, politics and policies should recognise sufficiency as a field of action instead of referring to individual decisions and lifestyles.
Since the introduction of Germany's first Thermal Insulation Ordinance in the 1970s in response to the oil crisis, requirements for the energy performance of buildings have consistently increased.
Today, these are ruled by the German Building Energy Act, which is currently being amended. Despite this continuous tightening of regulations, the energy consumption in German housing has hardly decreased. The continuous increase in residential space per person is a significant reason for this.
The concept of sufficiency - reducing energy uses beyond technical efficiency - is far-reaching and requires a reflection on human needs, energy services, urban structures, social norms, and the role of policies to support the shift towards lower-energy societies. In recent years, a growing body of literature has been published on energy sufficiency in various disciplines. However, there has been limited exchanges and cooperation among researchers so far, hindering the visibility and impact of this research. This paper presents an assessment of where sufficiency research stands, especially in the perspective of policy-making. It is the first overview paper issued in the context of the newly-founded ENOUGH network - International network for sufficiency research & policy, established in 2017. In the first part, we provide a condensed literature review on energy sufficiency, based on dozens of recent references collected through the network. Through four main themes (the nature of sufficiency, the challenges of modelling it, the barriers to its diffusion, and the approaches to foster it), we summarise the key issues and approaches. We then present what the scholars themselves see as the priorities for future research, promising sufficiency policy options, and key barriers that research should help overcome. We collected their views through a questionnaire completed by more than 40 knowledgeable authors and experts from various disciplines. We finally build on the previous parts to draw some recommendations on how sufficiency research could increase its impact, notably in relation to policy-making.
Estimating the sufficiency potential in buildings : the space between underdimensioned and oversized
(2019)
The emission reduction potential of energy efficiency and energy supply in buildings is estimated in various energy and climate action plans, scenarios, and potential analyses. But the third pillar of sustainability - sufficiency - is neglected in most studies.The increasing demand of space per person in the residential sector is a trend in most European countries. Its implication on energy use, demand for resources like land, building material, equipment, and waste production is enormous. Next to the ecological impact, the distribution of space has social and societal effects. Thus, sufficiency policies in the building sector complementing efficiency and energy policy are needed for a sustainable development of the European building stock.
But how can a sufficiency potential in the building sector be estimated? How much space and equipment is needed for a decent living and how much is too much? The paper proposes four areas of sufficiency in buildings: space, design and construction, equipment, and use. It presents a set of indicators, a quantitative estimate of energy savings from reduced per capita floor area, and visualises the sufficiency potential in European countries in an experimental approach. The final discussion focuses on the question: What does this mean for policy making?
The transformation processes towards a sustainable development are complex. How can science contribute towards new solutions and ideas leading to change in practice? The authors of this book discuss these questions along the energy transition in the building sector.
A transformative research that leaves the neutral observer position needs appropriate concepts and methods: how can knowledge from different disciplines and from practice be integrated in order to be able to explain and understand complex circumstances and interrelations? What role do complex (agent-based) models and experiments play in this respect? Which mix of methods is required in transformative science in order to actively support the actors in transformation processes?
Theses questions are illustrated by the example of the BMBF funded project "EnerTransRuhr".
The German contribution to limiting global warming to two degrees has to be - as in other developed countries, too - a reduction of 80 to 95 percent of CO2 emissions by 2050 compared to 1990. The project "Low Carbon City Wuppertal 2050" has analysed how such a drastic reduction of CO2 could be achieved on a municipal level in the transportation and residential sector by also working on the land use and material flows dimension. The focus of this paper lies on the space heating in the residential sector.
Wuppertal is a city with about 350,000 inhabitants in the West of Germany. According to the CO2 balance (2007) of the city that was adjusted to the year 2010, the emissions that were caused by space heating in the residential sector remained almost the same since 1990. They decreased slightly from 693,000 tons CO2 in 1990 to 691,000 tons in 2010, although final energy use for space heating increased by about 15 percent. But the shift of energy sources especially from coal to gas avoided an increase of emissions. However, the reduction target of 95 percent means that CO2 emissions have to be reduced to 35,000 tons per year until 2050.
A reference scenario shows that the city could achieve about 30 percent of the reduction required with the current trend of renewable energy development and energy efficiency measures such as retrofitting the building stock. But looking at the difficult financial conditions of the municipality as well as at the socio-economic situation of the inhabitants it becomes clear that the remaining 65 percent of the target to a 95 percent reduction will be difficult to reach and that innovative measures of energy efficiency and sufficiency1 need to be developed.
But which social-ecological effects does the implementation of comprehensive climate protection measures have on the inhabitants of a city? How do people live in a "Low Carbon City"? In this paper qualitative and quantitative scenarios will be developed since the combination of both is promising to show both effects: what share could renewable energies, energy efficiency and sufficiency measures have in reaching the target of 95 percent, and how could life look like in an almost CO2 free city in Germany in 2050.
A case study in the rural area of South Westphalia, Germany, showed the importance of independent intermediaries to support the development and implementation of sustainable energy and efficiency projects. The idea behind the project "Dorf ist Energie(klug)" (Village is Energy(smart)) was to foster, accompany, and support energy and efficiency projects in villages from the first idea to final implementation. Therefore, the South Westphalia Agency as independent intermediary initiated an application process in which villages could apply with their innovative energy and efficiency project ideas. During the following process the chosen "coaching villages" benefitted from the consultation of teams of thematic experts. Villages with less developed projects were supported through idea workshops with experts and study visits.
The accompanying scientific study evaluated the overall process focussing on the transferability, the sustainability and the quality of the process. Furthermore, a self evaluation tool for (energy) projects in villages was developed and tested in two of the participating coaching villages.
The paper gives a short insight into the project "Dorf ist Energie(klug)". It presents the methodology of the accompanying study and the results with a special focus on the role of the South Westphalia Agency as independent intermediary. Finally, it discusses the transferability and sustainability of the project.