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Nowadays, buildings are usually designed with an abstract and single perspective. This study shows that the context in which it will be located and the climate in which it is built also need to be considered.At all levels of land-use planning decisions, the use of energy has to be taken into account and urban planners have to develop solutions for efficient use of energy. Land-use patterns directly affect energy consumption and influence energy systems. This is seen, for example, from the small scale of "a house" to the large scale of "a country." No matter what the scale of land investigated, it is crucial to understand the significance of efficient energy planning in the contribution to global energy conservation.When looking from an energy-efficiency point of view, the different properties of the spatial structure are important. The fundamentals exercised when planning and decision making for local energy-efficiency planning are as effective for decisions on a regional scale (Owens 1990). Beside properties like orientation and microclimate on the smaller scale, wider spatial properties are also important on a larger scale. On a small scale, direct forward changes bring considerable improvements, for instance, adjusting the orientation of the building for the sake of energy saving and not adding extra cost to the construction. For comprehensive

a b s t r a c tThis study introduces the exergy analysis method into the field of urban planning, in order to find out the amount of energy that can be conserved in a building block when an energy efficient construction design is applied. This was done in four steps. First, energy efficient design parameters were derived from the literature and design alternatives were developed accordingly. Second, data was gathered from the case area for the exergy calculations. Third, exergy analysis of existing building blocks and proposed design alternatives were separately carried out. Finally, the amount of decrease in the exergy loss due to suggested energy efficient design was found out. The results show that the exergy efficiency of the existing building blocks is about 2%, while the proposed design alternatives will be around 10e11%. The overall exergy loads of the alternative plans were found as 166.3 W, 225.1 W, 142.5 W and 137.8 W respectively for winter and 105.4 W, 140.0 W, 89.9 W and 86.3 W respectively for summer, on a housing unit basis. As a result, the suitability and importance of the exergy analysis on the built environment was proven, by revealing actual and considerable energy conservation and sustainable use of energy through application of energy efficient design parameters.

In this study, in terms of urban design, an exergy analysis of Mavişehir mass housing area in Izmir, Turkey is carried out based on spatial properties, shadow effects, wind effects and local climate to understand the importance of design strategies. The exergy analysis is applied with broad consideration covering the heat loads of the separate buildings for winter and summer. When the exergy results of Mavişehir I and Mavişehir II are compared it is found that Mavişehir II has less exergy by fuel and exergy load values. This may result from different design strategies in Mavişehir I where the same buildings and villas between residential buildings are located according to sea view, whereas in Mavişehir II, there is a heterogeneous pattern with various forms and heights of the residential buildings. It was also discovered that exergy efficiency of the area is 4.20% and the exergy flexibility factor is 19.3%.of Colorado Denver. Some of her areas of interest include design and politics of public spaces, urban design, conservation of historic urban sites, and sustainable development.This paper is a revised and expanded version of a paper entitled 'Exergy analysis of a residential area in terms of energy efficiency, case study: Mavişehir' presented at 6th International Ege Energy Symposium & Exhibition, Izmir, Turkey, 28-30 June, 2012. IntroductionIt is wise to give importance to the energy used in cities to sustain domestic needs since almost 30% of the total energy consumption in the world arises from residential areas (Balocco et al., 2004). Moreover, increasing sensitivity to global warming and pressure to reduce energy consumption because of rising energy prices increases this importance. In addition to these facts, when the power of city planning on land-use decisions and applications are taken into consideration, it is easy to relate the energy consumption and sustainability to city planning. Besides, spatial planning evaluates the values/assets of the city and the region regarding preservation and land use.New emerging habits of the populations in cities bring larger problems about energy and environment, such as air, water, and earth pollution. These problems cause some irreversible changes globally. For the solution to these problems, urban design and planning may play an important role. Design of urban areas may include ecological concerns, as well as clean renewable energy-oriented solutions.Design of energy-efficient residential units, energy-efficient residential blocks, energy-efficient districts, and energy-efficient cities are important steps that have been taken for the sake of energy conservation. Therefore, it is crucial that energyeffectiveness must be taken into account starting from design of a single house up to the regional scale and all sub scales, regarding physical factors such as morphology, density, and microclimate properties. By considering energy-efficient design criteria in building block design, the energy efficiency citywide will be improved (Hisarlıgil, 2009).The planning decision ...

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