Lund, Henrik; Hvelplund, Frede; Kass, Ilmars; … - In: Energy 24 (1999) 7, pp. 549-559
From the Soviet time Latvia inherited a number of district-heating systems fuelled with Russian natural gas or imported heavy fuel oil. From a fuel efficiency point of view there is no reason to preserve the district heating systems unless the boilers are replaced by CHP. However, 50% of the...