1,721,011 research outputs found
Energy saving and comfort in office building: performances given by different combinations of window technologies and lighting control strategies
No full text
Simplified Models for Building Cooling Energy Requirement
Full text linkThis work regards the development and the validation a simplified model for building cooling energy requirement. It aims to be as similar as possible to the procedure adopted for calculating the winter heating energy demand of the UNI-CEN standards. The latter, a procedure based on a steady state model, including one or more corrective numerical-experimental correlations, that take into account in a simplified way – and thus approximately – the effects of thermal capacities on the phenomena under examination. The critical evaluation of the first results suggested changing the approach, in the model correlations developing process, from a physical parameters based to a building typology based. Nevertheless, following such approach, a good agreement has been achieved between the results of a detailed hourly simulation and the values predicted by the simplified model. Indeed there is evidence that acceptable results can only be obtained by providing a correlation by building archetype. To avoid such massive work in developing building archetype based correlations, it was developed and validated a more complex simplified dynamical model, using an average monthly day, and based on the approach followed by the prEN 13792 [3] standard for the freefloating summer room temperature profile evaluation. The results show that the use of such model did not increase the quality of the results, due to too strong simplifying assumption even if more physically based, especially if compared to the full hourly dynamical simulation (i.e model based on physical equation with few simplifying assumptions)
Energy saving in office buildings. A case study in Rome through the use of DOE2 and other simulation tools
Full text linkA large office building has been the object of a detailed feasibility study in order to select the most effective actions for energy saving in space cooling. Actions concerning the modification of building envelope layout, including materials, shading devices, colours, and retrofit insulation have been tested together with a set of improvements of the lighting system and an extensive use of daylighting strategies. Building energy performances under the various retrofit hypotheses have been assessed by means of DOE-2.1E. Changes in consumption of both electricity and fuel have been evaluated through all year round simulation. The integration of daylighting with lighting controls was simulated using a specific software (LUMENMICRO) in combination with DOE-2. All the actions have been classified according to their economic, energy and environmental performances
Valutazione della qualità energetica e ambientale di un edificio mediante un software di facile e rapido utilizzo
No full textItalian Local Policies and Programmes for Energy Efficiency. The Case Study of Rome
No full textLaw 10/1991 was issued in order to implement the National Energy Plan in the areas of energy efficiency, renew- ables, and CO2 emissions reduction.
The law requires the adoption of a number of tools: energy labelling of various end use devices, new building codes, incentives to the use of renewables, etc. Furthermore, Municipal and Regional Governments are required to develop their own energy plans with an emphasis on renewables and improved energy efficiency.
We present an analysis of the degree of implementation and efficacy of these tools, with a focus on local energy planning and actions. A relatively small number of energy plans have been drafted till now, very few DSM pro- grams have been performed by Municipal utilities and some Local Energy Teams have been created with support of EU.
The present level of analysis and action doesn’t seem to be adequate to the importance of the energy saving potential estimated in some of these plans. To support this thesis we present some of the results of the study for the Energy Plan of Rome (the fastest growing end uses, energy saving potential and renewables potential ..), which was concluded in 1995, according to an Integrated Resource Planning (IRP) approach. Follow-up actions from the plan have been a more detailed feasibility study for programmes to promote the use of daylighting and to reduce space cooling loads, and proposals for the inclusion of new rules in the building codes
Definition of building construction typologies in the Energy Master Plan of the city of Palermo
No full text- …
