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Add optional kLa input and calculation to advanced-reactor node

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p.vanderwilt
2025-06-17 11:13:38 +02:00
parent c8c588600c
commit 1da7a9f602
3 changed files with 22 additions and 4 deletions
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15
dependencies/reactor_class.js vendored
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@@ -3,7 +3,7 @@ const math = require('mathjs')
class Reactor_CSTR {
constructor(volume, n_inlets, initial_state) {
constructor(volume, n_inlets, kla, initial_state) {
this.state = initial_state;
console.log(this.state);
this.asm = new ASM3();
@@ -12,6 +12,8 @@ class Reactor_CSTR {
this.Fs = Array(n_inlets).fill(0.0); // fluid debits per inlet [m3 d-1]
this.Cs_in = Array.from(Array(n_inlets), () => new Array(13).fill(0.0)); // composition influents
this.OTR = 0.0; // oxygen transfer rate [g O2 d-1]
this.kla = kla; // if NaN, use external OTR [d-1]
this.currentTime = Date.now(); // milliseconds since epoch [ms]
this.timeStep = 1/(24*60*15) // time step [d]
@@ -31,6 +33,11 @@ class Reactor_CSTR {
return {topic: "Fluent", payload: {inlet: 0, F: math.sum(this.Fs), C:this.state}, timestamp: this.currentTime};
}
calcOTR(S_O, T=20.0) { // caculate the OTR using basic correlation, default to temperature: 20 C
let S_O_sat = 14.652 - 4.1022e-1*T + 7.9910e-3*T*T + 7.7774e-5*T*T*T;
return this.kla * (S_O_sat - S_O);
}
// expect update with timestamp
updateState(timestamp) {
let newTime = timestamp;
@@ -53,10 +60,10 @@ class Reactor_CSTR {
const r = this.asm.compute_dC(this.state);
const dC_in = math.multiply(math.divide([this.Fs], this.Vl), this.Cs_in)[0];
const dC_out = math.multiply(math.sum(this.Fs)/this.Vl, this.state);
const T_O = Array(13).fill(0.0);
T_O[0] = this.OTR;
const t_O = Array(13).fill(0.0);
t_O[0] = isNaN(this.kla) ? this.OTR : this.calcOTR(this.state[0]); // calculate OTR if kla is not NaN, otherwise use externaly calculated OTR
const dC_total = math.multiply(math.add(dC_in, dC_out, r, T_O), time_step);
const dC_total = math.multiply(math.add(dC_in, dC_out, r, t_O), time_step);
this.state = math.add(this.state, dC_total);
return this.state;