As shown in the previous practice, in design of central heating and hot water transmission networks it is assumed that diameters of pipelines should be selected taking into account the demand for thermal energy and hot water, as well as, flow resistance, without analyzing the important operational factor that is the thermal efficiency of pipelines.
In view of aconstant increase in prices of thermal energy and hot water production, the basic function limiting expensesof users should be the design of economical transmission networks with the lowest heat losses on transmissionavoiding excessive energy transfer into the ground in which pipelinesare located.
Considering the above-mentioned circumstances, SYNCO has developed and produced for several years a combined pipelinessystem comprising four transmission pipes in one heat-insulating casing,creating eight assortments, starting from a set of 2×75+50+32/293 m/m to 2×25+20+16/160 m/m.
Each assortment brings significant energy transfer savings which are presented in the tables in the pipeline working assumptions:
Central heating network – supply 70 ºC, return 40 ºC
Hot service water network – supply 60 ºC, circulation 40 ºC
Table No. 1
Comparison of heat losses of 4 independent pre-insulated pipelines to the “SYNCOPEX” pipeline construction with four pipes in one casing.
ECONOMIC ADVANTAGES NO. 1
|Diameter of exemplary single pipes in pre-insulation||Total heat loss|
of single pipes
|Total heat loss|
of quadruple pipes
|Reduction of heat loss
Table No. 2
Comparison of heat losses of two independent pre-insulated pipelines with two transmission pipes for the construction of “SYNCOPEX” pipelines with four pipes in one casing.
|lp.||Diameter of exemplary single pipes in pre-insulation||Total heat loss of single pipes||Total heat loss of quadruple pipes||Reduction of heat loss on transmission|
- Due to the fact that other companies that areproducing pre-insulated pipelines present heat losses in scope of single pipes and two working pipes in one casing only in a form of diagrams from which similar data to SYNCOPEX results, the tables contain the values of single and double pipes corresponding to SYNCOPEX system.
- The heat values included in the tables in the scope of four pipes in one casing are technical values that are certain from research and findings made by the Institute of Physics of the Building Research Institute in Warsawand refer to the „SYNCOPEX system.
From given values of heat losses of single and double pipelines for both SYNCOPEX pipelines and other similar products, compared to a system with four conduit pipes in one SYNCOPEX system casing, there is a clear economic effect on energy transmission for the network user and, therefore, we believe that pipelines with fours working pipes in one housing should find wide application in technical projects.