In order to study the influence on water temperature raise of river water source heat pump tail water discharged in different methods

the real sensor network is established by using digital temperature sensors. The simulation experiments of different discharging methods of river water source heat pump are carried out

including submerged-type discharge

surface-type discharge and jet-type discharge with 12 effluent ways. By using weighted average method

the preferred values of such factors as the average temperature raise，the temperature raise variance

the biggest temperature raise value

and the number of temperature measure points above the temperature raise average value are calculated. Moreover

the experiment results are analyzed by the three-dimensional figures of water temperature raise

which shows that jet-type discharge is better than submerged-type discharge and surface-type discharge，and the double-port way is better than single-port way. In addition

the double-port way along with the current in surface-type discharge method is the one that exerts least influence on river water temperature raise.