1,720,978 research outputs found
DINAMICA DI POPOLAZIONI ARBUSTIVE E PREFORESTALI NELL’APPENNINO UMBRO-MARCHIGIANO (ITALIA CENTRALE).
No full textThe scop of an air source heat pump: Comparison between on-off and inverter heat pump
Full text linkThe paper investigates the seasonal performance of electric air-to-water heat pump comparing an on-off heat pump with an inverter-driven variable speed compressor. Reference is made to a heat pump for domestic space heating installed in Bologna, and the bin-method proposed by UNI/TS 11300-4 is employed in order to investigate the effect of external temperature. The analysis shows that the inverter heat pump performs better than the on-off one, displaying higher values of SCOP about at least 10%
Replacement of gas boilers with air source heat pumps: An economic analysis based on a trnsys evaluation and on the actual energy prices in Italy
Full text linkIn this work, we investigate the replacement of a gas boiler with an electric air-to-water heat pump (AWHP) as a heating generation system for a detached single-family house. Attention is paid to the recent increase in energy prices in Italy. The evaluation of the energy consumption is done via a dynamic analysis performed by employing Trnsys. The investment results are economically advantageous only if the thermal energy demand is quite high, and the recent energy price increase (for both natural gas and electricity) leads to disadvantages in replacing the heat generation system in all the considered cases
Structure and dynamic of a Spartium junceum L. population in the central Apennines (Italy).
No full textHourly carbon dioxide emission factors for Italy
No full textThe data-set reports the hourly carbon dioxide emission factors related to electricity consumption and expressed in kg/kWh for Italy over a period of 4 years (2016-2019). The model employed to determine the hourly emission factor is presented in: “Interpolating functions for CO2 emission factors in dynamic simulations: the special case of a heat pump”, by Valdiserri P., Ballerini V. and Rossi di Schio E.., at present submitted for publication.The distinctive characteristics of the model are:- electricity exchanges between Italy and other Countries are taken into account;- power grid losses are considered; - the emission factor is referred to electricity consumed in Italy and not only on electricity produced.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV
Interpolating functions for CO2 emission factors in dynamic simulations: The special case of a heat pump
Full text linkThe decarbonization strategy implies a strong reduction of greenhouse gas emissions in Europe. The use of heat pumps as generation systems for space heating is increasing together with the increase of renewable energy sources and is also increasing the attention paid to dynamic simulations of heat pumps as well as greenhouse gas emissions. In the present study, a simplified model to determine the hourly emissions of carbon dioxide of a device connected to the Italian power grid is investigated, and an interpolating function for each year, as well as concerning average conditions, is introduced, as a valid tool for deciding the utilization strategies of a heat pump to reduce carbon dioxide emissions in the atmosphere, or, more in general, to evaluate the CO2 emissions when a common electric device is connected to the grid. The obtained results are applied to the special case of a residential heat pump displaying a particularly good agreement, with a maximum error of 1.8% for the heating season and 1.4% for the cooling one
Hourly data for evaluating the carbon dioxide emission factor of heat pumps or other devices connected to the Italian grid
Full text linkThis data article includes an elaboration of carbon dioxide data available from three different online sources in the years from 2016 to 2019. The data article refers to the paper “Interpolating functions for CO2 emission factors in dynamic simulations: the special case of a heat pump” by the same authors. The data are provided on an hourly basis and are useful to determine the carbon dioxide emission of an electric heat pump or other devices connected to the Italian grid. The importance of the provided data is related to the possibility of having an accurate estimation of the CO2 emission when the device works for only a limited period of time during the year or day. Moreover, since the given data are provided in electronic format (.txt file or .xlsx spreadsheet) they are very useful to perform dynamic simulation using self-made or commercial software such as Trnsys, Energy Plus etc
Thermal Characterization of Textile Waste Materials for Reuse in the Energy Refurbishing of Buildings
Full text linkThe study’s findings suggest new applications for End-of-Life Household Materials (EoLHMs), with a focus on new materials derived from textile wastes. The aim is twofold: explore innovative methods to promote the circular economy by reusing EoLHMs in the building sector and refurbishing buildings with particular attention to home-made panels, to favour disadvantaged contexts. Three different materials were tested, and their thermal conductivity was measured according to the ISO 8301 standard. The thermal conductivity as a function of the density was also investigated for a material derived from hemp. Comparisons with other textile materials are presented as well. As a result, the thermal conductivity of the materials ranged from 0.035 to 0.049 W/(m K), typical for insulating materials used in refurbishing applications
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