Abstract An empirical approach for the analysis of energy consumption of existing buildings of th... more Abstract An empirical approach for the analysis of energy consumption of existing buildings of the tertiary sector is presented in this study. It allowed the organization and management of large am...
Energy saving and emissions reduction are both affected by the energy efficiency of the built env... more Energy saving and emissions reduction are both affected by the energy efficiency of the built environment and the matching between the quality of the energy carrier and the quality of the required energy. To take into account qualitative aspects of energy leads to the introduction of the exergy concept. Heating and cooling of buildings require low valued energy, especially if low temperature heating systems and high temperature cooling systems are used. Nevertheless space conditioning is usually provided through high exergy sources. This study is related to the IEA ECBCS Annex 49 “Low Exergy Systems for High Performance Buildings and Communities”, in the framework of which a research for comparing different technologies for heating and cooling, from both the energy and the exergy perspective has been started, assuming steady state conditions. After that, dynamic simulations have been carried out in order to evaluate the effects of climatic conditions, systems behaviour and envelope’...
The manuscript analyses the management of low and ultra-low-temperature district heating systems ... more The manuscript analyses the management of low and ultra-low-temperature district heating systems (DHS) coupled with centralised and decentralised heat pumps. Operative conditions are defined in order to satisfy the heating needs without overloading the electric grid. The results are achieved by dynamic simulations, based on a real DHS located in southern Switzerland. At the building level, the heating needs are estimated considering real data and simultaneous energy simulations. Two DHS configurations, alternatives to the existing one, are simulated and suitable parameters for the management of the DHS are selected. The global performance of the two DHS is evaluated by KPIs also including the flexibility and the impact on the electric peak due to heat pumps. The achieved results are discussed providing suggestions for the stakeholders involved in DHS management for an optimal matching of the electric grid and thermal networks towards a reduction of the peak power. The rule-based con...
Although maps of solar irradiance are available, they don't have a sufficient resolution to c... more Although maps of solar irradiance are available, they don't have a sufficient resolution to consider the influence of the surrounding constructions and of natural elements such as trees, vegetation and small hills. A detailed knowledge of the solar radiance is instead necessary to evaluate the potential of solar technology (active and passive) and to orientate choices, decisions and investments in energy and urban plans. The UiSOL project (Urban integrated Solar Technologies) analyzes the relationship between different variables that characterize the urban layout and consequently its solar active and passive potential and, in order to prevent an indiscriminate use of solar application and to invest economic and space resources in the more effective way possible, also evaluate various methods of utilization to find a good balance between technical and aesthetical requests.
La biomassa è una fonte di energia rinnovabile localmente disponibile, programmabile e versatile.... more La biomassa è una fonte di energia rinnovabile localmente disponibile, programmabile e versatile. Nel contributo si considera il suo utilizzo in sistemi di teleriscaldamento, sulla base di alcune esperienze di successo del nord Italia. Tali sistemi hanno favorito lo sviluppo di una filiera locale basata sui sottoprodotti forestali, in alternativa ai tradizionali combustibili fossili. Sulla base di precedenti ricerche, vengono discussi i benefici e le possibili evoluzioni future di tali sistemi.
Abstract An empirical approach for the analysis of energy consumption of existing buildings of th... more Abstract An empirical approach for the analysis of energy consumption of existing buildings of the tertiary sector is presented in this study. It allowed the organization and management of large am...
Energy saving and emissions reduction are both affected by the energy efficiency of the built env... more Energy saving and emissions reduction are both affected by the energy efficiency of the built environment and the matching between the quality of the energy carrier and the quality of the required energy. To take into account qualitative aspects of energy leads to the introduction of the exergy concept. Heating and cooling of buildings require low valued energy, especially if low temperature heating systems and high temperature cooling systems are used. Nevertheless space conditioning is usually provided through high exergy sources. This study is related to the IEA ECBCS Annex 49 “Low Exergy Systems for High Performance Buildings and Communities”, in the framework of which a research for comparing different technologies for heating and cooling, from both the energy and the exergy perspective has been started, assuming steady state conditions. After that, dynamic simulations have been carried out in order to evaluate the effects of climatic conditions, systems behaviour and envelope’...
The manuscript analyses the management of low and ultra-low-temperature district heating systems ... more The manuscript analyses the management of low and ultra-low-temperature district heating systems (DHS) coupled with centralised and decentralised heat pumps. Operative conditions are defined in order to satisfy the heating needs without overloading the electric grid. The results are achieved by dynamic simulations, based on a real DHS located in southern Switzerland. At the building level, the heating needs are estimated considering real data and simultaneous energy simulations. Two DHS configurations, alternatives to the existing one, are simulated and suitable parameters for the management of the DHS are selected. The global performance of the two DHS is evaluated by KPIs also including the flexibility and the impact on the electric peak due to heat pumps. The achieved results are discussed providing suggestions for the stakeholders involved in DHS management for an optimal matching of the electric grid and thermal networks towards a reduction of the peak power. The rule-based con...
Although maps of solar irradiance are available, they don't have a sufficient resolution to c... more Although maps of solar irradiance are available, they don't have a sufficient resolution to consider the influence of the surrounding constructions and of natural elements such as trees, vegetation and small hills. A detailed knowledge of the solar radiance is instead necessary to evaluate the potential of solar technology (active and passive) and to orientate choices, decisions and investments in energy and urban plans. The UiSOL project (Urban integrated Solar Technologies) analyzes the relationship between different variables that characterize the urban layout and consequently its solar active and passive potential and, in order to prevent an indiscriminate use of solar application and to invest economic and space resources in the more effective way possible, also evaluate various methods of utilization to find a good balance between technical and aesthetical requests.
La biomassa è una fonte di energia rinnovabile localmente disponibile, programmabile e versatile.... more La biomassa è una fonte di energia rinnovabile localmente disponibile, programmabile e versatile. Nel contributo si considera il suo utilizzo in sistemi di teleriscaldamento, sulla base di alcune esperienze di successo del nord Italia. Tali sistemi hanno favorito lo sviluppo di una filiera locale basata sui sottoprodotti forestali, in alternativa ai tradizionali combustibili fossili. Sulla base di precedenti ricerche, vengono discussi i benefici e le possibili evoluzioni future di tali sistemi.
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