Line data Source code
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47 :
48 : #include <EnergyPlus/Data/EnergyPlusData.hh>
49 : #include <EnergyPlus/DataBranchAirLoopPlant.hh>
50 : #include <EnergyPlus/DataLoopNode.hh>
51 : #include <EnergyPlus/Plant/Branch.hh>
52 : #include <EnergyPlus/PlantUtilities.hh>
53 :
54 : namespace EnergyPlus {
55 : namespace DataPlant {
56 :
57 485989 : Real64 BranchData::DetermineBranchFlowRequest(EnergyPlusData &state)
58 : {
59 :
60 : // SUBROUTINE INFORMATION:
61 : // AUTHOR Edwin Lee
62 : // DATE WRITTEN September 2010
63 : // MODIFIED na
64 : // RE-ENGINEERED na
65 :
66 : // PURPOSE OF THIS SUBROUTINE:
67 : // This routine will analyze the given branch and determine the representative
68 : // flow request.
69 :
70 : // METHODOLOGY EMPLOYED:
71 : // Several possibilities are available. In any case, the request is constrained to within
72 : // branch outlet min/max avail. This assumes that the component flow routines will properly
73 : // propagate the min/max avail down the branch.
74 : // Some possibilities for flow request are:
75 : // 1) take the outlet flow rate -- assumes that the last component wins
76 : // 2) take the inlet flow rate request -- assumes that the request is propagated up and is good
77 : // 3) take the maximum request
78 : // 4) move down the loop and take the maximum "non-load-range-based" request within min/max avail bounds
79 : // This assumes that load range based should not request flow for load-rejection purposes, and we
80 : // should only "respond" to other component types.
81 :
82 485989 : int const BranchInletNodeNum = this->NodeNumIn;
83 485989 : int const BranchOutletNodeNum = this->NodeNumOut;
84 485989 : Real64 OverallFlowRequest = 0.0;
85 :
86 485989 : if (this->controlType != DataBranchAirLoopPlant::ControlType::SeriesActive) {
87 485988 : OverallFlowRequest = state.dataLoopNodes->Node(BranchInletNodeNum).MassFlowRateRequest;
88 : } else { // is series active, so take largest request of all the component inlet nodes
89 3 : for (int CompCounter = 1; CompCounter <= this->TotalComponents; ++CompCounter) {
90 2 : int const CompInletNode = this->Comp(CompCounter).NodeNumIn;
91 2 : OverallFlowRequest = max(OverallFlowRequest, state.dataLoopNodes->Node(CompInletNode).MassFlowRateRequest);
92 : }
93 : }
94 :
95 : //~ Now use a worker to bound the value to outlet min/max avail
96 485989 : OverallFlowRequest = PlantUtilities::BoundValueToNodeMinMaxAvail(state, OverallFlowRequest, BranchOutletNodeNum);
97 :
98 485989 : return OverallFlowRequest;
99 : }
100 :
101 : } // namespace DataPlant
102 : } // namespace EnergyPlus
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