scholarly journals FEASIBILITY OF HEAT PUMPS SUPPLYING DISTRICT HEATING SYSTEMS - CASE STUDY FOR AUSTRIA AND DENMARK

2018 ◽  
Author(s):  
Wiebke Meesenburg ◽  
Keyword(s):  
District Heating ◽  
Heat Pumps ◽  
Heating Systems ◽  
District Heating Systems

Method for Redesign of District Heating Networks within Transition from the 2nd to the 3rd Generation

2014 ◽  
Vol 657 ◽  
pp. 689-693
Author(s):  
Răzvan Corneliu Lefter ◽  
Daniela Popescu ◽  
Alexandrina Untăroiu
Keyword(s):  
District Heating ◽  
Design Stage ◽  
Heating Systems ◽  
Load Duration ◽  
Load Duration Curve ◽  
District Heating Systems ◽  
Consumption Rates ◽  
Heat Loads ◽  
Heating Networks

Important investmentsare made lately in the area of district heating, as a technology capable ofhelping countries to reach sustainability goals. In Romania, European fundswere spent for transition from the 2nd to the 3rdgeneration of district heating systems. The lack of appropriate monitoringsystems in old district heating systems makes optimisation nowadays very difficult,especially because nominal values used in the first design stage areoverestimated. Realistic nominal heat loads are necessary to make goodestimations of hydraulic parameters to be used for redesign. This studyproposes a method that uses the heat load duration curve theory to identify theappropriate nominal heat loads to be used for redesign. Comparison betweenresults obtained by applying the nominal heat loads of each consumer, as theywere established in the first design stage, and the ones identified by theproposed method are analyzed in a case study. The results show that errors arein the +/- 3% band, between the metered heat consumption rates and the proposedrates. The new method can be used for the sizing of pumps and district heatingnetworks after retrofit, in order to get better adjustments of the circulationpumps and increase of the energy efficiency.

scholarly journals Hourly optimization and sizing of district heating systems considering building refurbishment – Case study for the city of Zagreb

Energy ◽  
2017 ◽  
Vol 137 ◽  
pp. 1264-1276 ◽  
Author(s):  
Matija Pavičević ◽  
Tomislav Novosel ◽  
Tomislav Pukšec ◽  
Neven Duić
Keyword(s):  
District Heating ◽  
Heating Systems ◽  
District Heating Systems ◽  
Building Refurbishment ◽  
The City

Solar energy use in district heating systems. A case study in Latvia

Energy ◽  
2017 ◽  
Vol 137 ◽  
pp. 586-594 ◽  
Author(s):  
Raimonda Soloha ◽  
Ieva Pakere ◽  
Dagnija Blumberga
Keyword(s):  
Solar Energy ◽  
Energy Use ◽  
District Heating ◽  
Heating Systems ◽  
District Heating Systems

scholarly journals Business and socioeconomic assessment of introducing heat pumps with heat storage in small-scale district heating systems

2019 ◽  
Vol 139 ◽  
pp. 904-914 ◽  
Author(s):  
Poul Alberg Østergaard ◽  
Jan Jantzen ◽  
Hannah Mareike Marczinkowski ◽  
Michael Kristensen
Keyword(s):  
Heat Storage ◽  
District Heating ◽  
Heat Pumps ◽  
Small Scale ◽  
Heating Systems ◽  
District Heating Systems
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