Theoretical Study on Even Heating of Single Pipe Heating System

  • Xiaoli Yin
  • Mingsheng Liu
  • Zhixian MaEmail author
  • Jili Zhang
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 890)


In order to solve the problem of thermodynamic imbalance commonly existing in the heating system, an adjustment method that can realize the uniform heating to a building is put forward. In the single pipe system, it regulates the flow based on the energy balance between the heat of system supply for users and the heat dissipation of radiator to indoor, reversing the direction of the supply water and return water. By means of theoretical analysis, the results indicate that this method can solve the problem of building overheating, and the energy saving rate is higher than 30%. This method can also solve the problem of uneven heat and cold of the building by adjusting the ratio of positive and reverse times.


Heating system Energy balance Reverse direction Overheating Uneven cold and heat 


\( Q_{e} \)

the heat supply for users, W

\( Q_{E}^{{}} \)

the heat supply for users at the set room temperature, W


the thermal load from the first to the seventh floor, W


the number of radiators from the first to the seventh floor, W

\( Q_{r} \)

the heat dissipation of a single chip radiator, W

\( A_{r} \)

the area of dissipation of a single chip radiator, W

\( t_{o,d} \)

the outdoor calculation temperature of heating, ℃

\( t_{i,d} \)

the room design temperature of heating, ℃

\( Q_{n} \)

the heat dissipation of the radiator to the room, W

\( Q_{N} \)

the heat dissipation of the radiator to the room at the set temperature, W

\( \Delta t \)

the average water temperature in the radiator, ℃

\( \rho \)

the density of water, kg/m³

\( c \)

the specific heat capacity of water, J/(kg ℃)

\( G \)

the volume flow of water, m³/h

\( T_{1} \)

the inlet water temperature, ℃

\( T_{2} \)

the outlet water temperature, ℃

\( T_{n}^{{}} \)

the room temperature, ℃

\( T_{N} \)

the set room temperature, ℃

\( K \)

the heat transfer coefficient of radiator, W/(m2 ℃)

\( A \)

the heat exchanger area, m2

\( B \)

the energy regulation coefficient, W/℃

\( a \)

the time of up-supply and down-circle

\( b \)

the time of down-supply and up-circle


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Xiaoli Yin
    • 1
  • Mingsheng Liu
    • 1
  • Zhixian Ma
    • 2
    Email author
  • Jili Zhang
    • 1
  1. 1.Institute of Building Energy, Dalian University of TechnologyDalianChina
  2. 2.Faculty of Infrastructure Engineering, Dalian University of TechnologyDalianChina

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