Two Way

This route is used for two way interpolation of manufacturer's capacities at the indoor and outdoor design conditions.

Example:
My summer outdoor design is 92° dry-bulb and my indoor design is 63° wet-bulb
  • The manufacturer's published indoor data is 67° and 62° wet-bulb, so interpolation is needed to calculate the capacity at 63° wet-bulb
  • The manufacturer's published outdoor data is 85° and 95° dry-bulb, so interpolation is needed to calculate the capacity at 92° dry-bulb.

    • Route:

    POST https://hvacmath.com/api/v1/interpolate

    JSON Input Example:

    • aboveDesign
      The manufacturer's capacity above the indoor and outdoor design conditions.
    • belowDesign
      The manufacturer's capacity below the indoor and outdoor design conditions.
    • designInfo
      The design information for the project.
    • houseLoad
      The house load for the project at design conditions.
    • manufacturerAdjustments
      Optional adjustments multipliers to the manufacturer's capacity.
    • systemType
      The system type for the interpolation.
      • {
  "designInfo" : {
    "elevation" : 0,
    "summer" : {
      "indoorHumidity" : 50,
      "indoorTemperature" : 75,
      "outdoorTemperature" : 90
    },
    "winter" : {
      "outdoorTemperature" : 5
    }
  },
  "houseLoad" : {
    "cooling" : {
      "sensible" : 13894,
      "total" : 17872
    },
    "heating" : 49667
  },
  "route" : {
    "cooling" : {
      "twoWay" : {
        "aboveDesign" : {
          "aboveWetBulb" : {
            "capacity" : {
              "sensible" : 15937,
              "total" : 24828
            },
            "cfm" : 800,
            "indoorTemperature" : 75,
            "indoorWetBulb" : 67,
            "outdoorTemperature" : 95
          },
          "belowWetBulb" : {
            "capacity" : {
              "sensible" : 19078,
              "total" : 23046
            },
            "cfm" : 800,
            "indoorTemperature" : 75,
            "indoorWetBulb" : 62,
            "outdoorTemperature" : 95
          }
        },
        "belowDesign" : {
          "aboveWetBulb" : {
            "capacity" : {
              "sensible" : 16330,
              "total" : 25986
            },
            "cfm" : 800,
            "indoorTemperature" : 75,
            "indoorWetBulb" : 67,
            "outdoorTemperature" : 85
          },
          "belowWetBulb" : {
            "capacity" : {
              "sensible" : 19605,
              "total" : 24029
            },
            "cfm" : 800,
            "indoorTemperature" : 75,
            "indoorWetBulb" : 62,
            "outdoorTemperature" : 85
          }
        },
        "manufacturerAdjustments" : {
          "airToAir" : {
            "heating" : 1,
            "sensible" : 1,
            "total" : 1
          }
        }
      }
    }
  },
  "systemType" : {
    "airToAir" : {
      "climate" : "mildWinterOrLatentLoad",
      "compressor" : "variableSpeed",
      "type" : "heatPump"
    }
  }
}

      JSON Output Example:

      {
  "failures" : [
    "Oversizing total failure"
  ],
  "isFailed" : true,
  "result" : {
    "cooling" : {
      "altitudeDerating" : {
        "airToAir" : {
          "heating" : 1,
          "sensible" : 1,
          "total" : 1
        }
      },
      "capacityAsPercentOfLoad" : {
        "latent" : 115.6,
        "sensible" : 139,
        "total" : 133.8
      },
      "excessLatent" : 618,
      "finalCapacityAtDesign" : {
        "sensible" : 19318,
        "total" : 23915
      },
      "interpolatedCapacity" : {
        "sensible" : 18700,
        "total" : 23915
      },
      "sizingLimits" : {
        "oversizing" : {
          "cooling" : {
            "latent" : 150,
            "total" : 130
          }
        },
        "undersizing" : {
          "cooling" : {
            "latent" : 90,
            "sensible" : 90,
            "total" : 90
          }
        }
      }
    }
  }
}

      Validation Errors

      The following is an example of errors if the inputs are not appropriate.

      Two Way Request Errors:
General:
(aboveDesign.below, designInfo.summer).indoorTemperature: Above design below indoor temperature should be less than the summer design indoor temperature.
(belowDesign.below, designInfo.summer).indoorTemperature: Below design below indoorTemperature should be less than the summer design indoor temperature.

Above Design:
aboveDesign.above.indoorWetBulb: Above indoor wet-bulb should be greater than 63°.
aboveDesign.(above, below).indoorWetBulb: Above indoor wet-bulb should be greater than below design indoor wet-bulb.
aboveDesign.above.cfm: Cfm should be greater than 0.
aboveDesign.above.indoorTemperature: Indoor temperature should be greater than 0.
aboveDesign.above.capacity.total: Total capacity should be greater than 0
aboveDesign.above.capacity.sensible: Sensible capacity should be greater than 0
aboveDesign.below.cfm: Cfm should be greater than 0.
aboveDesign.below.indoorTemperature: Indoor temperature should be greater than 0.
aboveDesign.below.capacity.total: Total capacity should be greater than 0
aboveDesign.below.capacity.sensible: Sensible capacity should be greater than 0

Below Design:
belowDesign.above.indoorWetBulb: Above indoor wet-bulb should be greater than 63°.
belowDesign.(above, below).indoorWetBulb: Above indoor wet-bulb should be greater than below design indoor wet-bulb.
belowDesign.above.cfm: Cfm should be greater than 0.
belowDesign.above.indoorTemperature: Indoor temperature should be greater than 0.
belowDesign.above.capacity.total: Total capacity should be greater than 0
belowDesign.above.capacity.sensible: Sensible capacity should be greater than 0
belowDesign.below.cfm: Cfm should be greater than 0.
belowDesign.below.indoorTemperature: Indoor temperature should be greater than 0.
belowDesign.below.capacity.total: Total capacity should be greater than 0
belowDesign.below.capacity.sensible: Sensible capacity should be greater than 0