I have an inquiry on setting up ZoneCrossMixing object.
I simulated 2 cases (cross mixing case and no cross mixing case) by changing the relation of inter-zone heat & mass transfer and compared. However, there was no difference in the temperature of each zone in the non-air-conditioned time zone in each case. So I really appreciate if you could have advices or comments on this matter.
The description of how I set the ZoneCrossMixing object in the cross mixing case is as follows. If you see the object of PneandPn((perimeter North East zone & perimeter North zone), I set the ZoneCrossMixing object as follows, Zone Pne and Zone Pn to be source and receiving zone. The reason I set is that crossmixing occurs only in the case of “the temperature of source Zone－the one of Receiving Zone＞＝ ΔT (default=zero )”. I believe that it should occur in the case of the “temperature of Receiving Zone－the one of source Zone＞＝ ΔT (default=zero)”. So I set this way to all the inter-zone.
And I set the design flow to an amount equivalent to 0.5 ventilation per hour in a smaller zone. (Pne floor area: 40.96m2, Pn floor area: 245.76m2, Ceiling Height: 2.6m) In the idf editor, design flow rate unit is m3/s, so I used this unit. However, I suspect that the correct unit is m3/min. (Because after I changed the unit, I got the result seemed to be correct.)
ZoneCrossMixing, 1F:PneAndPn, !- Name 1F:Pne, !- Zone Name On, !- Schedule Name Flow/Zone, !- Design Flow Rate Calculation Method 0.016, !- Design Flow Rate {m3/s} , !- Flow Rate per Zone Floor Area {m3/s-m2} , !- Flow Rate per Person {m3/s-person} , !- Air Changes per Hour {1/hr} 1F:Pn; !- Source Zone Name
ZoneCrossMixing, 1F:PnAndPne, !- Name 1F:Pn, !- Zone Name On, !- Schedule Name Flow/Zone, !- Design Flow Rate Calculation Method 0.016, !- Design Flow Rate {m3/s} , !- Flow Rate per Zone Floor Area {m3/s-m2} , !- Flow Rate per Person {m3/s-person} , !- Air Changes per Hour {1/hr} 1F:Pne; !- Source Zone Name
