Abstract
The presented water hammer calculations are related to a district heating transmission network. Two transient-state and water hammer causing situations were simulated, one where the valve on the main pipe was shut down parallely to a pump drop-out, the other in relation to the occurence of a pump drop-out followed by a re-start of the pump. The heat carrying medium is smooth district heating water, and as a consequence the pipe friction is reduced by 75%. It can be concluded that the adding of tenside to usual district heating water does not necessarily cause severe water hammer problems as long as it concerns normal operation. The aspects of using smooth water are, larger heat capacity in existing network, lower forward temperature in exisiting network, energy savings in exisiting network and dimension decrease in new network. Operation can occur at considerably high water velocities and larger quantities of heat energy could be transfered in an exisiting network. The possibility for opeation at lower forward temperatures is also presented. Operation with smooth water under conditions corresponding to a normal situation would result in savings at the pumping operation level. The use of smooth water will achieve considerable economic savings because the design
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Citation Formats
Hammer, F, and Soerensen, M.
Pressure surges in smooth water transmission systems; Trykstoed i transmissionssystemer med glat vand.
Denmark: N. p.,
1991.
Web.
Hammer, F, & Soerensen, M.
Pressure surges in smooth water transmission systems; Trykstoed i transmissionssystemer med glat vand.
Denmark.
Hammer, F, and Soerensen, M.
1991.
"Pressure surges in smooth water transmission systems; Trykstoed i transmissionssystemer med glat vand."
Denmark.
@misc{etde_10144720,
title = {Pressure surges in smooth water transmission systems; Trykstoed i transmissionssystemer med glat vand}
author = {Hammer, F, and Soerensen, M}
abstractNote = {The presented water hammer calculations are related to a district heating transmission network. Two transient-state and water hammer causing situations were simulated, one where the valve on the main pipe was shut down parallely to a pump drop-out, the other in relation to the occurence of a pump drop-out followed by a re-start of the pump. The heat carrying medium is smooth district heating water, and as a consequence the pipe friction is reduced by 75%. It can be concluded that the adding of tenside to usual district heating water does not necessarily cause severe water hammer problems as long as it concerns normal operation. The aspects of using smooth water are, larger heat capacity in existing network, lower forward temperature in exisiting network, energy savings in exisiting network and dimension decrease in new network. Operation can occur at considerably high water velocities and larger quantities of heat energy could be transfered in an exisiting network. The possibility for opeation at lower forward temperatures is also presented. Operation with smooth water under conditions corresponding to a normal situation would result in savings at the pumping operation level. The use of smooth water will achieve considerable economic savings because the design of the network is in smaller dimensions. An adaptation of the velocities and dimensions will make it possible to stay below the given pressure step level. Savings on equipment and purchase of valves can also be achieved. (AB).}
place = {Denmark}
year = {1991}
month = {Dec}
}
title = {Pressure surges in smooth water transmission systems; Trykstoed i transmissionssystemer med glat vand}
author = {Hammer, F, and Soerensen, M}
abstractNote = {The presented water hammer calculations are related to a district heating transmission network. Two transient-state and water hammer causing situations were simulated, one where the valve on the main pipe was shut down parallely to a pump drop-out, the other in relation to the occurence of a pump drop-out followed by a re-start of the pump. The heat carrying medium is smooth district heating water, and as a consequence the pipe friction is reduced by 75%. It can be concluded that the adding of tenside to usual district heating water does not necessarily cause severe water hammer problems as long as it concerns normal operation. The aspects of using smooth water are, larger heat capacity in existing network, lower forward temperature in exisiting network, energy savings in exisiting network and dimension decrease in new network. Operation can occur at considerably high water velocities and larger quantities of heat energy could be transfered in an exisiting network. The possibility for opeation at lower forward temperatures is also presented. Operation with smooth water under conditions corresponding to a normal situation would result in savings at the pumping operation level. The use of smooth water will achieve considerable economic savings because the design of the network is in smaller dimensions. An adaptation of the velocities and dimensions will make it possible to stay below the given pressure step level. Savings on equipment and purchase of valves can also be achieved. (AB).}
place = {Denmark}
year = {1991}
month = {Dec}
}