Natural gas transmission

net calorific values for transmission system use nominationsSince 1 January 2012, on the Croatian natural gas market the measuring unit kWh (kWh/h) has been used in compliance with the provision of the article 53. –Regulation on natural gas market organisation (OG 126/10, OG 128/11).

The TSO publishes net calorific values of natural gas used by suppliers and balance group leaders when nominating the use of the transmission system to convert natural gas quantities expressed in m3/h (m3/day) into the measuring unit for energy kWh/h (kWh).
The expressed net calorific values are the result of natural gas quality tests carried out in the certified laboratory of the Republic of Croatia.
The conversion of the net calorific value expressed in MJ/m3 into kWh/m3, at reference conditions 15°C/15°C, was carried out by division by 3.6 (kWh/m3), and the resulting value was then rounded to six decimal digits.

The document with the calorific value can be downloaded here:
  01.03.2012 - 15.03.2012 * NEW NCV VALUES PUBLISHED

The following data are used for transmission system use nominations at the interconnection with the upstream TSO:
1. Hungary – Croatia (FGSZ Ltd.)
2. Slovenia – Croatia (Plinovodi d.o.o.)
Period 27.02.2012 - 04.03.2012
  GROSS CALORIFIC VALUE (GCV)
(kWh/m3  @ 0°C/25°C)
UMS ROGATEC 11.184
 
 
Period 05.03.2012 - 11.03.2012
  GROSS CALORIFIC VALUE (GCV)
(kWh/m3  @ 0°C/25°C)
UMS ROGATEC 11.188
 
 
 
Net calorific values for transmission system use nominations from 01.03.2012. to 15.03.2012.

Gas quality report 2011
 
SPECIFIC POINT		 NET CALORIFIC
VALUE		 GROSS CALORIFIC
VALUE		 UPPER WOBBE
INDEX
(MJ/m3 @15°C) (MJ/m3 @15°C) (MJ/m3 @15°C)
BJELOVAR 34.11 37.85 49.75
CPS MOLVE 34.30 38.05 49.72
DOBROVAC 34.02 37.76 50.01
DONJA DUBRAVA 33.90 37.62 49.25
ĐURĐEVAC 33.43 37.02 44.85
ETAN 34.45 38.23 50.43
KOZARAC 34.96 37.71 50.15
KUTINA 34.02 37.77 50.04
LUDBREG 34.03 37.77 49.73
OSIJEK 34.04 37.78 49.72
PS FERDINANDOVAC 32.84 36.31 41.78
PS GOLA 33.96 37.68 48.02
PSP OKOLI 33.95 37.70 50.16
PULA 33.76 37.50 50.14
SLAVONSKI BROD 33.95 37.69 50.11
SPIŠIĆ BUKOVICA 34.02 37.76 49.65
VIRJE 34.47 38.24 49.89
ZABOK 34.49 38.27 50.43
ZAGREB ŽITNJAK 34.98 37.74 50.22
 
 * The relevant values represent average annual values of gas quality parameters.