η max Software

η max Software

Cold Storage Operating Simulation
emRS SELECTION AND ANALYSIS SOFTWARE

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Input temperature setting(0℃~-65℃)and product temperature for Thermal load calculation. According to the result, determine operating time and  equipment selection.

Available emRS model for tk optimizer system

Achieving significant power reduction by minimize temperature differential (TD) and optimize pressure between condensing and evaporating in operation.

Refrigerator

  • Mitsubishi Electronic SF/SL・MS series (R404A)
  • Hitachi Appliances RSU series (R404A)/RS series
  • KOBELCO compressor izα・SHα series (R-404A)/SHN series (NH3)

※The minimum condensation temperature has set approximately to 0℃ by every maker. The only SF series from Mitsubishi Electronic listed a capacity to -5℃.

Unit Cooler

  • Combining emRS unit cooler
  • R-404A 60 unit type line up
  • NH3 Aluminum tube・Aluminum fin 35 unit type line up

Piping capacity calculation of both suction and liquid line will be proceeded after deciding combination of the unit and equipment installation site.
At the end, select the local place for running cost calculation which is calculated with operation time under condition of monthly invasion heat and the system ability.
This simulation software is accurate for it calculates ability for equilibrium combining ability of unit cooler, refrigerator and piping construction.
For example, if the condensation temperature changed, it will automatically change the evaporating capacity. And the variation of the capacity effects to the unit cooler and also to the suction pipe.
The calculation includes those influential facts of pressure drop value even a value of pressure drop by valves to every circumstances in simulation.
This emRS selection software is accurate within less than 5% from the verification result.
According to the result of simulation, it is ready for distributor to be selected. And the software auto create optimized condensing pressure program for tk optimizer.

The software is also supportable of calculation for power consumption and emission rate of CO2 through the year. The result is comparable with facility in common (TD≦12℃)

For Refrigerator Manufacturers

We suggest you to list your refrigerator specifications:
Condensing temperature
Evaporating temperature
Liquid temperature
Power consumption
Condensing method (Air cooling/Chilled cooling)

We are willing to help examine equipment selection with ηmax Refrigeration System Selection and Analysis software

Simulation software for refrigerator operation

  • Thermal load calculation
  • Equipment selection
  • Ability of piping calculation
  • Local place running cost calculation throughout the year

Simulation sample data

Installation site
Room temperature Tokyo 23 wards Sapporo Okinawa
-30℃ PDF PDF PDF
-50℃ PDF PDF PDF
-60℃ PDF PDF

Freezing Simulation

  • Heat transfer simulation (Thermal fluid analysis software)
  • Equipment selection
  • Ability of piping calculation
  • Local place running cost calculation throughout the year

Unit Cooler Evaporating Capacity Calculation Program

  1. R-22

    CUT/Al Fin, CUT/Cu Fin, ALT/Al Fin

  2. R-404A

    CUT/Al Fin, CUT/Cu Fin, ALT/Al Fin

  3. R-717

    ALT/Al Fin, Aerofin tube

  4. R-407C

    Optimized buzz calculation included. (for air condition)
    CUT/Al Fin, CUT/Cu Fin, ALT/Al Fin

  5. R-744(CO2)

    CUT/Al Fin, CUT/Cu Fin, ALT/Al Fin

Unit cooler freezing ability evaporating capacity calculation software is done by three methods below.

  • Additional calculate program in conformity to JIS
  • Pierre equation
  • Standard for Forced-Circulation Air Cooling and Air-Heating Coils Standard.

※Each calculation program has included pipe pitch efficiency for fins by selecting either Fabris or Schmid.

Unit cooler pressure drop calculation program

  • Preferred format
  • Martinelli
  • N-S Equations

Simplex piping ability calculation program

  • Liquid pipe
    R-22/R-404A/NH3/R-407C/R-744 (CO2)
  • Suction pipe (Stand pipe for oil returning)
    R-22/R-404A/NH3/R-407C/R-744 (CO2)

Simplex thermal calculation program

Expansion valve ability calculation program

  • D.D.wile equation

Intermediate temperature calculation program

Preferred value calculation from thrust quantitative ratio of high and low stage

Polynomial creating program

Enquiries