This report outlines the capabilities and technical specifications of PsychroSI, a psychrometric calculation software developed by ThermExcel to automate thermal engineering and HVAC analysis within Microsoft Excel. 1. Executive Summary
PsychroSI is a VBA-powered Excel application designed for professionals in thermal engineering, HVAC design, and building management. It automates the calculation of moist air properties and complex psychrometric processes, such as air mixing, cooling with dehumidification, and swimming pool thermal balances. 2. Core Technical Capabilities
The software determines the complete state of humid air based on two known input variables: Input Combinations: Dry-bulb temperature + Relative humidity Dry-bulb temperature + Wet-bulb temperature Dry-bulb temperature + Specific humidity (moisture content) Dry-bulb temperature + Enthalpy Relative humidity + Specific humidity Specific humidity + Enthalpy
Calculated Output Parameters: Dry/Wet bulb temperatures, dew point, relative humidity, specific moisture, enthalpy, density, specific volume, and vapor pressure. 3. Key Functional Modules
Psychrometric Processes: Analysis of air mixtures with reheating, cooling, and dehumidification.
Humidification Analysis: Specialized calculations for steam water injection and its impact on air temperature and hygroscopy.
Swimming Pool Thermal Calculation: Evaluation of evaporation and heat requirements for pool environments.
Weather Data Integration: Includes a library of approximately 265 international weather sites to provide localized climatic parameters for HVAC dimensioning. 4. Software Architecture & Usability
Platform: Built as an Excel file (.xls) or add-in, utilizing Visual Basic for Applications (VBA) for automated routines.
Interface: Features a customized toolbar for accessing calculation boxes and macros.
Data Management: Users can create separate workbooks for different projects or duplicate sheets within a single file for comparative studies. 5. Professional Applications Application Primary Use Case HVAC Sizing
Dimensioning air conditioning installations based on local climate. Process Analysis Determining air states before and after vaporization. Pool Design
Calculating thermal loss and humidity control for indoor swimming areas.
If you'd like to dive deeper into a specific part of the PsychroSI program, please tell me if you're interested in:
Detailed steps for setting up a specific air-mixing calculation.
The library of weather data available for your specific region.
How to integrate PsychroSI results into other ThermExcel modules like AeroDuct or HydroTherm.
programs, sizing, piping, HVAC, heating, air ... - ThermExcel
program by ThermExcel is an Excel-based tool designed for HVAC engineers to perform complex psychrometric calculations for moist air. It is particularly useful for sizing heating, ventilation, and air conditioning systems, as well as specialized applications like indoor swimming pools. 1. Key Functions of PsychroSI
The software allows you to determine all physical properties of moist air based on two known input variables. Common input combinations include: Dry Bulb Temperature Relative Humidity Dry Bulb Temperature Wet Bulb Temperature Dry Bulb Temperature Specific Humidity Specific Humidity 2. Core Capabilities Air Mixture Calculations
: Analyze the resulting properties of two air streams mixing (e.g., fresh outdoor air and recirculated indoor air). Cooling and Dehumidification
: Calculate the heat exchange and moisture removal during cooling processes. Heating and Humidification : Determine energy requirements for air treatment. Swimming Pool Thermal Analysis : A dedicated module specifically for the thermal calculation of indoor pools
, including water evaporation rates and required ventilation to maintain comfort. 3. User Interface & Data Management According to the official documentation , PsychroSI features: Custom Toolbar
: A dedicated ribbon or menu in Excel for quick access to calculation boxes and macros. Modular Worksheets
: You can create separate files for different projects or duplicate sheets within the same file to compare similar design scenarios. Detailed Results
: Outputs include density, dew point, vapor pressure, and specific volume. 4. Practical Workflow Define Ambient Conditions thermexcel programme psychrosi
: Enter the altitude or atmospheric pressure of the project location. Input States
: Define the "State of Air" (Point 1, Point 2, etc.) using the known variables. Process Simulation
: Select the transformation type (e.g., sensible heating, cooling with condensation). Review Heat Loads
: The program will generate the total, sensible, and latent heat changes (in kW or Watts).
For more specific pipe sizing or steam distribution, you might also look into complementary tools like ThermoVapor or HydroTherm module or the air mixing
Title ThermExcel Program for Psychosis: A Pilot Proposal and Preliminary Framework
Abstract This paper proposes the ThermExcel program — a structured, heat‑augmented psychosocial intervention combining thermoregulation techniques, cognitive remediation, and evidence‑based psychosis therapies to improve symptom control, cognitive function, and social outcomes in people with psychotic disorders. We outline rationale, intervention components, study design for a pilot randomized controlled trial (RCT), outcome measures, and implementation considerations.
Introduction
Intervention (ThermExcel Program)
Mechanisms of Action (Hypothesized)
Study Design (Pilot RCT)
Statistical Analysis
Ethical and Practical Considerations
Limitations
Implementation and Next Steps
Conclusion ThermExcel is a structured, plausible adjunctive program combining controlled heat exposure with cognitive and psychosocial therapies for psychosis. A pilot RCT will assess feasibility, safety, and provide effect size estimates to inform larger efficacy trials.
References (select examples to add in final manuscript)
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The PsychroSI programme from ThermExcel is a specialized calculation tool for HVAC professionals designed to analyze and calculate the properties of humid air based on inputting two known variables. It handles air mixtures, isothermal humidification, and swimming pool environments while providing custom, project-specific, and SI-compliant data management. Detailed technical resources and documentation can be found on ThermExcel's website
programs, sizing, piping, HVAC, heating, air ... - ThermExcel
PsychroSI is a specialized psychrometric calculation software developed by ThermExcel that operates within Microsoft Excel. It is designed for engineers and HVAC professionals to analyze the thermodynamic properties of moist air and perform complex climate-related calculations. Key Features and Capabilities
Moist Air Analysis: Determines all physical parameters of moist air based on two input elements, such as dry temperature and relative humidity, or enthalpy and specific moisture.
Psychrometric Processes: Calculates air mixtures, including reheating, cooling, and vaporization processes.
Weather Database: Includes an integrated library of climatic data for various geographical locations to assist in sizing air-conditioning installations. Intervention (ThermExcel Program)
Specialized Calculations: Features dedicated modules for thermal calculations related to swimming pools.
Excel Integration: Uses a customized toolbar within Excel to provide access to procedures, calculation boxes, and VBA-based macro commands. Calculated Parameters
The program can identify a wide range of properties, including: Dry, wet, and dew point temperatures. Relative humidity and specific moisture. Enthalpy, density, and specific volume. Sensible and latent heat values.
The software is available for download and purchase directly from the ThermExcel Programs page. Présentation du programme PsychroSI - ThermExcel
The PsychroSI (often referred to simply as Psychro) program is a professional psychrometric calculation software developed by ThermExcel for the HVAC and thermal engineering industries. It is designed as an advanced Excel-based tool for calculating the physical properties of humid air and simulating complex air-treatment processes. Core Functionality
The program functions as a digital psychrometric chart, allowing users to determine all physical properties of humid air by entering any two known input parameters. Supported Input Pairs: Dry bulb temperature + Relative humidity Dry bulb temperature + Wet bulb temperature Dry bulb temperature + Specific humidity (moisture content) Dry bulb temperature + Enthalpy Specific humidity + Enthalpy
Output Parameters: The program calculates total state values including enthalpy, density, specific volume, vapor pressure, dew point temperature, and adiabatic saturation temperature. Key Modules & Simulations
Beyond simple state calculations, PsychroSI includes specialized modules for common HVAC engineering tasks:
Air Mixture Calculations: It simulates the mixing of two air streams (e.g., fresh outdoor air and recirculated return air), determining the resulting state point.
Heating & Cooling Processes: Users can model sensible heating, sensible cooling, or cooling with dehumidification to determine the required energy transfer in coils.
Humidification: It specifically calculates isothermal humidification via steam injection, accounting for the slight temperature changes that occur during vaporization.
Swimming Pool Thermal Analysis: A dedicated sub-module for calculating the thermal requirements and evaporation rates of indoor swimming pools. Technical Features
Built with VBA (Visual Basic for Applications), the software integrates directly into Excel through a customized command bar.
Multi-Unit Support: It can handle both SI (metric) and US/Imperial units, such as Pa, kPa, psi, and feet of water for pressure.
Modular Architecture: Working files are created separately to optimize storage, and users can duplicate or add calculation sheets within a single file to compare different design scenarios without losing previous data.
Professional Usage: It is widely used by engineers and contractors for sizing air handling units (AHUs), ductwork systems, and industrial humidifiers.
thermexcel.com/english/program/program.htm">ThermExcel programs like AeroDuct?
programs, sizing, piping, HVAC, heating, air ... - ThermExcel
PsychroSI is a specialized Excel-based psychrometric calculation program developed by ThermExcel for HVAC engineering. It is used to simulate moist air states, design air conditioning cycles, and perform thermal calculations for specific environments like swimming pools.
Below is a structured white paper or technical overview of the ThermExcel PsychroSI program based on its official documentation. Technical Overview: ThermExcel PsychroSI
Application: Psychrometric Calculations and HVAC Process Simulation 1. Program Introduction
PsychroSI is an engineering tool integrated directly into Microsoft Excel via a customized toolbar. It allows users to define the thermodynamic state of moist air and model various HVAC processes without manual chart plotting. 2. Core Capabilities
The program determines all psychrometric parameters of moist air (enthalpy, humidity ratio, dew point, etc.) based on any two input variables: Dry bulb temperature and relative humidity. Dry bulb and wet bulb temperatures.
Dry bulb temperature and specific moisture (humidity ratio). Relative humidity and specific moisture. Enthalpy and specific moisture. 3. Key HVAC Process Simulations
PsychroSI enables precise modeling of the following air treatment stages: with correlations for:
Air Mixing: Calculating the resultant properties of two mixed air streams (e.g., return air and fresh outdoor air).
Heating and Cooling: Modeling sensible heat exchange and cooling with dehumidification.
Humidification: Simulating steam water injection (isothermal) and adiabatic cooling (hygroscopic).
Weather Data Integration: Includes a built-in library of climatic data for different locations to assist in sizing installations. 4. Specialized Modules: Swimming Pool Thermal Calculations
A distinct feature of PsychroSI is its specific module for swimming pool design. It calculates: Evaporation rates from the water surface.
Thermal loads required to maintain air and water temperatures. Dehumidification requirements for indoor pool enclosures. 5. Workflow and Documentation
The program operates by creating separate "working files" within Excel to keep data lightweight and organized.
Creation: Use the "Psychrometric" menu on the custom toolbar to "Create a new working file".
Automation: Users can duplicate calculation sheets for similar studies to quickly compare different design scenarios.
Reporting: Results are typically presented in tabular format within Excel, which can be exported or printed as professional engineering reports. Resources for Further Implementation
Official Documentation: Detailed instructions can be found in the PsychroSI Presentation PDF.
Purchase/Download: The program is available for purchase via the ThermExcel Order Form.
Given this, the most plausible interpretation is that you are asking for a report on Thermexcel software applied to psychrometric processes, especially cooling, dehumidification, or frosting/defrosting conditions (where “psychrosi” could be a coined term from Greek psychros = cold).
Below is a detailed technical report based on that interpretation.
Below is a practical workflow for modeling a psychrosy process using ThermExcel functions.
Is ThermExcel old? Yes. Does it look like Windows 95? Absolutely. But for simulating psychrosi—the complex process of chilling surfaces, managing condensation, and balancing insulation—it is still a powerhouse.
While younger engineers reach for complex 3D simulation tools, the veterans open Excel. They run the ThermExcel psychrosi macro. They get a number. They check the dew point. And then they build a system that stays bone-dry, energy-efficient, and perfectly cold.
Sometimes, the best way to beat the heat is to embrace the spreadsheet.
Do you use legacy tools for modern cooling problems? Have you ever had a "psychrosi" failure (condensation disaster)? Let me know in the comments below.
The Psychrosi module isn't just a simple calculator; it includes advanced features for detailed analysis:
In the complex world of HVAC (Heating, Ventilation, and Air Conditioning), precision is everything. Whether you are designing a ventilation system for a skyscraper or calculating the cooling load for a server room, understanding the properties of air is the first step.
But let’s face it: manually calculating wet-bulb temperatures, enthalpy, and dew points using psychrometric formulas is tedious and prone to error. Enter Thermexcel, a suite of Excel-based tools that has become a staple for engineers. Today, we are focusing on one of its most powerful modules: the Psychrosi (Psychrometric) Program.
ThermExcel is not a standalone application but a sophisticated collection of macros, formulas, and psychrometric functions embedded within Microsoft Excel. Developed primarily for HVAC engineers, it offers:
Unlike expensive proprietary software, ThermExcel leverages the universal accessibility of Excel, making professional-grade psychrometric analysis available on any laptop.
Thermexcel solves the following for each coil row and segment:
Q_sens = m_dot_air * cp_air * (T_air_in - T_air_out)Q_lat = m_dot_air * h_fg * (W_in - W_out)Q_total = m_dot_air * (h_in - h_out)The software uses the ε-NTU method extended to dehumidifying coils, with correlations for: