Figure 8 - uploaded by Petrescu Laura Elena
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The annual (a)and inter-annual variation (b) of the HDDn18 index at Bucharest-Băneasa meteorological station (1980-2015) (Data source: NMA, 2021) In this experimental study, only the winter months (D, J, F) were taken into consideration, both separately and for the entire cold season. First of all, all parameters
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The energy consumption has become a real concern in choosing the most cost- effective way and resources for indoor-heating. This experimental study tried to estimate both the energy amounts needed to heat up the residential indoor spaces and the resulting average costs that people living in the Bucharest Metropolitan Area might have to pay for heat...
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Context 1
... is noteworthy that there were years with no cold waves (1988, 1997 and 2013) too. A specific version of the degree-days (DDs) index (Figure 8), namely the heating degree-days (HDDs) wasalso needed to calculate the CEC index and ultimately, the amount of energy required to heat indoor spaces and the energy costs for winter months. ...
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... the highest heating degree-days (HDDs) sums are specific of the cold season and the lowest values are commonin summer. In July, for example, the HDDn18 index reached a value of 76.9°C, which means that quite a few of the minimum air temperature values were greater than +18°C, while in winter, the HDD sums may go up to 709.3°C (Fig. 8a).The inter-annual variation of heating degree days (HDDs) shows that 1993 was the coldest year in the 1980-2015 period (5,081°C), followed by 1985, with a total of 5,024.4°C. The warmest years were both 1994 and 2014 (with 4,223.6°C, respectively 4,183.3°C).In this case, a slight increase of this index was specific for the first decade ...
Context 3
... (5,081°C), followed by 1985, with a total of 5,024.4°C. The warmest years were both 1994 and 2014 (with 4,223.6°C, respectively 4,183.3°C).In this case, a slight increase of this index was specific for the first decade of the analyzed period, but the trend decreases after the 1990`s, by an average of 350°C (from almost 4750°C to only 4400°C) (Fig. 8b). The main cause of this trend is most probably the general ongoing climate warming process, more evident in the evolution trend of minimum air-temperatures. 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 ...
Context 4
... is noteworthy that there were years with no cold waves (1988, 1997 and 2013) too. A specific version of the degree-days (DDs) index (Figure 8), namely the heating degree-days (HDDs) wasalso needed to calculate the CEC index and ultimately, the amount of energy required to heat indoor spaces and the energy costs for winter months. ...
Context 5
... the highest heating degree-days (HDDs) sums are specific of the cold season and the lowest values are commonin summer. In July, for example, the HDDn18 index reached a value of 76.9°C, which means that quite a few of the minimum air temperature values were greater than +18°C, while in winter, the HDD sums may go up to 709.3°C (Fig. 8a).The inter-annual variation of heating degree days (HDDs) shows that 1993 was the coldest year in the 1980-2015 period (5,081°C), followed by 1985, with a total of 5,024.4°C. The warmest years were both 1994 and 2014 (with 4,223.6°C, respectively 4,183.3°C).In this case, a slight increase of this index was specific for the first decade ...
Context 6
... (5,081°C), followed by 1985, with a total of 5,024.4°C. The warmest years were both 1994 and 2014 (with 4,223.6°C, respectively 4,183.3°C).In this case, a slight increase of this index was specific for the first decade of the analyzed period, but the trend decreases after the 1990`s, by an average of 350°C (from almost 4750°C to only 4400°C) (Fig. 8b). The main cause of this trend is most probably the general ongoing climate warming process, more evident in the evolution trend of minimum air-temperatures. 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 ...
