Heat exchanger LMTD (counterflow or parallel) with duty and area, or counterflow...

{ "method": "GET", "queryParams": { "areaM2": 2, "arrangement": "counterflow", "coldInC": 20, "coldOutC": 50, "hotInC": 100, "hotOutC": 60, "mode": "lmtd", "uWPerM2K": 500 }, "type": "http" }

{ "example": { "arithmeticMeanDeltaTK": 45, "arrangement": "counterflow", "asOf": "2026-10-21T06:33:56.875Z", "coldRange": 30, "correctionFactorParamP": 0.375, "correctionFactorParamR": 1.33333, "degraded": false, "deltaT1K": 50, "deltaT2K": 40, "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.", "dutyW": 44814.201, "hotRange": 40, "lmtdK": 44.814201, "mode": "lmtd", "notChecked": [ "multipass or crossflow correction factors (single-pass pure counterflow or parallel flow only)", "fouling, property changes and phase change inside the exchanger", "…1 more" ], "reasons": [ "LMTD = (dT1 - dT2) / ln(dT1 / dT2) with dT1 = Th,in - Tc,out and dT2 = Th,out - Tc,in; equal end differences give LMTD = that difference.", "Q = U A LMTD.", "…1 more" ], "requiredAreaM2": null, "source": "computed locally (LMTD = (dT1 - dT2)/ln(dT1/dT2); counterflow effectiveness e = (1 - exp(-NTU(1-Cr))) / (1 - Cr exp(-NTU(1-Cr))), e = NTU/(1+NTU) at Cr = 1)", "summary": "counterflow LMTD 44.8142 K (end differences 50 and 40 K); duty 44814.2 W.", "uWPerM2K": 500, "verdict": "COMPUTED" }, "type": "json" }