.TT pocketengineer building services engineering

digital psychrometric chart plotting and analysis software

Rethink, Reinvent, Re-imagine . . . for reasons of engineering thought; the art of psychrometrics

Psychrometric Visual - digital psychrometric chart

> point properties calculation

> point plotting

> point-to-point line plotting

> find coil ADP

> process load analysis

> tools to find intersection point

> design & verification

To take a glance at all pocketEngineer software and OS requirements, click Software List.

Psychro Visual . . . that reflects the digital way you work

Psychrometirc chart presents graphically the air properties used for air conditioning calculations.

Let's get solutions and checks done in a simpler way. Only 2 input parameters (Dry bulb temperature, and Relative humidity or Wet bulb temperature) are required to find state point properties, point plotting, point-to-point line plotting.

see verification and check example here...

Not given Relative Humidity (RH), how?

You can input Wet bulb temperature. Psychro Visual also comes with built-in RH Finder to find RH from given Wet bulb temperature or Humidity ratio.

Feature: Right-Click on input textbox for selections. Built-in tools are Mixing Air (MA) calculator, Temperature converter, RH Finder.

At Atm. Pressure input, built-in tools are Pressure converter, Pressure at altitude calculator.

Add, Edit, Delete Points, how?

Designed in a familiar look and style, it is just like using spreadsheet. No learning curve is required.

Feature: You can save input points for subsequent retrieval via file open. It also automatically retrieves your last working input points when you return to Psychro Visual for the next round. All these are specially considered ..... to save you time in keying in points repeatedly.

Important to Note: Chart Range and Units

Pyschro Visual is designed in SI units only. IP units is not available.

Chart Range:

Dry Bulb Temperature: 0 - 50 deg.C.

Humidity Ratio: 0 - 0.05 kg/kg.

Atmospheric Pressure Range: 22,632 - 107,478 Pa

4 Components UI Design Layout

Point Editor - add, edit, delete points
Line Editor - add, edit, delete point-to-point line.
Process Editor - coil load, room load, OA load, and coil condensate analysis.
Psychro Chart - user plot and interface with psychrometric chart.

Extract Results from the Psychro Visual program for customized report (only when needed)

see downloadable Load Analysis example report

(1) Point Properties Results (via copy/paste)

(2) Plotted Psyhcro Chart (via copy/paste chart, print chart and point properties to pdf)

see downloadable print chart and point properties to pdf printout

Feature: You can turn on/off RH, DryBulb Temperature and Enthalpy lines.

(3) Process Analysis Results (via copy/paste)

Coil load analysis
Room load analysis
OA load analysis
Coil condensate

Feature: Airflow can be Standard or Actual.

OA Load analysis (OA to RA): Airflow = 0.4371 CMS

Sensible heat (kW) = 7.34 (2.1 Ton)

Latent heat (kW) = 14.74 (4.2 Ton)

Total heat (kW) = Sensible + Latent = 22.08 (6.3 Ton)

Total heat (kW) [enthalpy method] = 22.52 (6.4 Ton)

Sensible Heat Ratio = Sensible/Total Heat = 0.332

Actual specific volume (m³/kg) = 0.9113

Actual air density (kg/m³) = 1.1205

Add-on Tools: Find Intersection Point (PsychroX)

2 built-in methods to find intersection point: Graphical or Numerical method

see downloadable Intersection Point Example: Find ADP

Tutorial Example

Design an air-conditioning system for the following conditions. The room condition is achieved by first cooling & dehumidifying process, and then by heating process.

Outdoor air conditions: 32 oC, 65% RH
Room air conditions: 25 oC, 60% RH
Supply airflow: 15000 CMH
Coil dew temperature: 13 oC

Calculate the following:

[1] Coil cooling load

[2] Heating load

[3] Outdoor air load

[4] Coil condensate

Solutions

See downloadable solutions here.