For residential homes, the best method of calculating heat loss/gain is called a Manual J. This heat and cooling load calculation, developed by Air Conditioning Contractors of America (ACCA), can be manually or computer calculated. Most computerized versions provide input values for an easier and faster calculation. Most software versions offer instructions on inputting data. A properly sized HVAC system, combined with a seasonal service check, will provide years of efficient operation.
The ' Cooling Tower Software ' program is based on these two flow patterns managed by the cooling tower. This calculating program has three functions and it can be used for: (i) designing a new project, (ii) upgrading the performance of an existing counter flow tower,. (iii) verifying the efficiency and working conditions of a tower. Cooling Tower Efficiency Calculations Cooling Tower Efficiency Calculation is described in this article. Cooling Tower plays a major role in Chemical Process Industry. They reject process heat from the cooling water to atmosphere and keep the water cool. The performance of the cooling tower depends on various parameters like Range & Approach.
HVAC Software: When You Replace An HVAC System, A Load Calculation Should Be Done
This dates me, but I remember when you installed or replaced an air conditioning system for a house, you took the square footage of the building, times it by 12, added 6000, and rounded it up to the nearest 1/2 ton (6000 btu/h). For example, a 1200 square foot home = 1200 x 12 + 6000 = 20400 btu/hr. Since 12,000 btu/hr = 1 ton of cooling. The nearest 1/2 ton to 20400 would be 24,000 btu/hr or 2 tons of cooling.
The formula worked well for the old 8 SEER systems. The only R rating we were concerned with then was at the movies (bad joke about thermal resistance). Most houses were heated by gas or oil. When you added air conditioning, you had to change the blower motor and installed a fan center on the furnace. This was for generating higher fan speeds in the air conditioning mode.
That was a long time ago and changes in HVAC technology have greatly improved since then. Energy efficiency is now a concern. Homes are better insulated and engineering improvements to doors and windows have changed exceedingly.
For example, an older home that had single pane window glass, and little or no insulation in the walls or attic, would be sized for a 3 ton AC system. With upgrades to the windows and more insulation in the walls and attic, a new 2.5 ton air conditioning system could now do the same job as the old 3 ton system using less energy. Today, many factors go into calculating the values to correctly size an HVAC system.
Revised March 2017 A suite of cooling tower applications that is indispensable to anyone responsible for the peak performance of cooling towers. Applications include, Air Properties Calculator, Merkel Number calculator, Demand Curve Worksheet (calculates tower performance & characteristic curve test method) and Mechanical Draft Tower Performance Test Analyzer (performance curve method). The performance test analyzer compliments the ATC-105 cooling tower test code. Many fully explained examples presented in the help files. Educational pricing & site licensing available upon request.
Cooling Tower Calculation, free cooling tower calculation software downloads.
Toolkit v3.1 is Windows Vista and Windows 7 compatible. To view screen shots. To download a demo. To view order form.
Why you need the CTI ToolKit? • Thermal Design Worksheet. An interactive, graphical worksheet designed to speed cooling tower thermal calculations. Set your own values for wet bulb, range and altitude, and plot your own demand curve on virtually any printer. • Performance Evaluator. Evaluates induced draft counterflow and crossflow cooling tower performance with field acquired data. Fully compliant with the latest CTI ATC-105 test code (performance curve method).
• Air Properties Calculator. Fully ASHRAE compliant, using latest psychrometric property routines. • Detailed Help Files. How-to-use help for typical applications is just a click away.
What does the CTI ToolKit do for me? • Predicts off-design performance with the Demand Curve Tab application.
Answers what-if questions like, how much will my leaving water temperature change if I increase my waterflow 10%? Decrease my range 15%? • Evaluates cooling tower performance and acceptance tests. • Performance Curve Tab: application allows the automatic calculation of cooling tower performance using the performance test method of the CTI ATC-105. Automatically solves the iterative calculations for the exit air temperature and psychrometric properties to compute the test L/G as required by CTI ATC-105. Accurately interpolates between curves and generates all the necessary crossplots to determine the overall Tower Capability. • Demand Curve Tab: application speeds the evaluation of the characteristic curve method.
Cooling Tower Design Calculation Software
This application allows the calculation of the overall Tower Capability when manufacturer's performance curves are unavailable. High quality demand curve pages produced on any printer for your exact set of design conditions at any altitude. • Produces your own performance curves from field test data. Using the Demand Curve Tab application and a single test point, create a set of performance curves along with any spreadsheet. • All without picking up a pencil!
Cooling Tower Design Calculations Software
System Requirements Microsoft Windows 95/98, 2000, XP, Vista, and Windows 7. Product Unit Price Title CTI Member Price Non-Member Price CTI ToolKit Version 3.2 (single user license) $395 $450 CTI ToolKit Version 3.2 (Upgrade from V3.0) $25 $40 CTI ToolKit Version 3.2 (Upgrade from V1.0 or V2.0) $95 $120 Processing Fee Shipping via UPS Ground UPS 2nd Day Air UPS Next Day Air Mail International $15 $28 $43 TBD Please allow 1-2 weeks for delivery.