Heat-exchanger NTU-effectiveness API

Effectiveness-NTU method: computes NTU = UA/Cmin, capacity ratio Cr, and effectiveness ε via the closed-form relation for counter/parallel/cross flow, plus actual heat duty and both outlet temperatures from inlets. Answers 'What is the effectiveness of this heat exchanger?', 'What are the outlet temperatures from the NTU method?'.

Price$0.06per request

MethodPOST

Route/v1/engineering/heat-exchanger-ntu

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

engineeringthermofluidsntueffectivenessheat-exchangercapacity-ratecounter-flowthermal

API URLhttps://x402.hexl.dev/v1/engineering/heat-exchanger-ntu

Integration docs

Example request

{
  "capacityRateHotWK": 2000,
  "capacityRateColdWK": 3000,
  "overallUAWK": 2500,
  "arrangement": "counter",
  "hotInletC": 150,
  "coldInletC": 30
}

Example response

{
  "capacityRateHotWK": 2000,
  "capacityRateColdWK": 3000,
  "capacityRateMinWK": 2000,
  "capacityRatio": 0.666667,
  "overallUAWK": 2500,
  "ntu": 1.25,
  "arrangement": "counter",
  "effectiveness": 0.607949,
  "formula": "NTU = UA/Cmin, Cr = Cmin/Cmax, Q = ε*Cmin*(Thi - Tci)",
  "interpretation": "Effectiveness is the actual heat transfer divided by the thermodynamic maximum.",
  "hotInletC": 150,
  "coldInletC": 30,
  "maxHeatDutyW": 240000,
  "actualHeatDutyW": 145907.827536,
  "hotOutletC": 77.046086,
  "coldOutletC": 78.635943
}

Input schema

{
  "type": "object",
  "required": [
    "capacityRateHotWK",
    "capacityRateColdWK",
    "overallUAWK"
  ],
  "properties": {
    "capacityRateHotWK": {
      "type": "number",
      "description": "hot-side heat-capacity rate C = ṁ·cp (W/K)",
      "examples": [
        2000
      ]
    },
    "capacityRateColdWK": {
      "type": "number",
      "description": "cold-side heat-capacity rate (W/K)"
    },
    "overallUAWK": {
      "type": "number",
      "description": "overall conductance UA (W/K)"
    },
    "arrangement": {
      "type": "string",
      "enum": [
        "counter",
        "parallel",
        "cross-both-unmixed"
      ],
      "examples": [
        "counter"
      ]
    },
    "hotInletC": {
      "type": "number",
      "description": "hot inlet temperature (°C) for duty/outlets"
    },
    "coldInletC": {
      "type": "number",
      "description": "cold inlet temperature (°C)"
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}