Cost-Effectiveness of Energy Efficiency and Renewable Energy Technologies for Reducing Peak Demand

This paper describes an optimization-based approach to evaluate measures providing peak electricity demand reduction cost benefits for Saudi residential buildings. These measures can be categorized as energy efficiency (EE) and renewable energy (RE) measures. Specifically, this paper models the existing Saudi building stock using 56 housing prototypes based on types, vintages and locations.

Wave-like global economic ripple response to Hurricane Sandy

Tropical cyclones range among the costliest disasters on Earth. Their economic repercussions along the supply and trade network also affect remote economies that are not directly affected. We here simulate possible global repercussions on consumption for the example case of Hurricane Sandy in the US (2012) using the shock-propagation model Acclimate. The modeled shock yields a global three-phase ripple: an initial production demand reduction and associated consumption price decrease, followed by a supply shortage with increasing prices, and finally a recovery phase. Regions with strong trade relations to the US experience strong magnitudes of the ripple. A dominating demand reduction or supply shortage leads to overall consumption gains or losses of a region, respectively. While finding these repercussions in historic data is challenging due to strong volatility of economic interactions, numerical models like ours can help to identify them by approaching the problem from an exploratory angle, isolating the effect of interest. For this, our model simulates the economic interactions of over 7,000 regional economic sectors, interlinked through about 1.8 million trade relations. Under global warming, the wave-like structures of the economic response to major hurricanes like the one simulated here are likely to intensify and potentially overlap with other weather extremes.

Small Arms and Armed Violence in Papua New Guinea: Developing a demand-reduction agenda

<p>The Papua New Guinea government has adopted a range of measures aimed at reducing the supply of illicit small arms and light weapons in response to persistent problems with their use in inter-communal fighting and crime. However, these measures have been largely ineffective at reducing the level of armed violence in PNG, in part because of the failure to also address the demand that exists for these weapons. A nascent demand reduction agenda has emerged at the local level throughout Papua New Guinea in response to the failure of the national government to adequately address small arms and armed violence problems. This thesis provides a detailed overview of national, regional and international initiatives to address small arms issues and examines how they have been implemented in PNG. It then examines initiatives by local community groups and NGOs that are aimed at reducing small arms and armed violence and considers how successful they have been.</p>

Small Arms and Armed Violence in Papua New Guinea: Developing a demand-reduction agenda

<p>The Papua New Guinea government has adopted a range of measures aimed at reducing the supply of illicit small arms and light weapons in response to persistent problems with their use in inter-communal fighting and crime. However, these measures have been largely ineffective at reducing the level of armed violence in PNG, in part because of the failure to also address the demand that exists for these weapons. A nascent demand reduction agenda has emerged at the local level throughout Papua New Guinea in response to the failure of the national government to adequately address small arms and armed violence problems. This thesis provides a detailed overview of national, regional and international initiatives to address small arms issues and examines how they have been implemented in PNG. It then examines initiatives by local community groups and NGOs that are aimed at reducing small arms and armed violence and considers how successful they have been.</p>

Automatic energy demand and system simulation at district level

The importance of climate protection and sustainability is steadily increasing all over the world. However, there is a large potential for reducing emissions in the heating demand reduction and renewable heat supply of buildings that needs to be addressed. Therefore, a method was developed within the scope of this work that allows local decision-makers such as energy supply companies, project developers and the public sector to calculate, evaluate and compare different scenarios to make buildings and city districts more sustainable based on few and widely available input data. It includes both the determination of the heat demand and measures for its reduction as well as the selection and simulation of centralised and decentralised supply systems. A combination of different methods from the fields of geoinformatics, heuristic decision-making and object-oriented modelling is used. The latter forms a focal point in the work with the development of a data model for energy system components to enable automatic simulation. The applicability as well as the transferability of the method is shown in several case studies. Based on the simulations results, which can be related to CO2 emissions as well as costs, recommendations for the implementation of measures can be given and implemented.The paper is a summary of the dissertation with the title “Automatische Simulation von Wärmebedarf und -versorgung auf Quartiersebene” by the first author at Karlsruhe Institute for Technology.

Climate-Based Analysis for the Potential Use of Coconut Oil as Phase Change Material in Buildings

One of the most efficient measures to reduce energy consumption in buildings is using passive thermal comfort strategies. This paper shows the potential of coconut oil as a bio-based phase change material (PCM) incorporated into construction components to improve the thermal performance of buildings for several climates, due to its environmental advantages, wide availability, and economic feasibility. The thermophysical properties of coconut oil were determined through differential scanning calorimetry. Numerical simulations were conducted in ESP-r, comparing an office space with a gypsum ceiling to one with coconut oil as PCM for 12 climate types in the Köppen–Geiger classification. The results show that coconut oil is a suitable PCM for construction applications under tropical and subtropical climates. This PCM can provide year-round benefits for these climates, even though a higher melting point is needed for optimum performance during hotter months. The highest demand reduction of 32% and a maximum temperature reduction of 3.7 °C were found in Mansa, Zambia (Cwa climate). The best results occur when average outdoor temperatures are within the temperature range of phase change. The higher the diurnal temperature range, the better the results. Our findings contribute to a better understanding of coconut oil in terms of its properties and potential for application in the building sector as PCM.