COOLING LOAD CALCULATIONS AND PRINCIPLES

Cooling load calculations may be used to accomplish one or more of the following objectives:

     a)   Provide information for equipment selection, system sizing and system design.

     b)   Provide data for evaluating the optimum possibilities for load reduction.

     c)   Permit analysis of partial loads as required for system design, operation and control.

This course provides a procedure for preparing a manual calculation for cooling load.  A number of published methods, tables and charts from industry handbooks, manufacturer’s engineering data and manufacturer’s catalog data usually provide a good source of design information and criteria in the preparation of the HVAC load calculation.  It is not the intent of this course to duplicate this information but rather to extract appropriate data from these documents as well as provide a direction regarding the proper use or application of such data so that engineers and designers involved in preparing the calculations can make the appropriate decision and/or apply proper engineering judgment.
The course includes two example calculations for better understanding of the subject.



 TABLE OF CONTENTS

  1.0         OBJECTIVE
  2.0         TERMINOLOGY
  3.0          SIZING YOUR AIR-CONDITIONING SYSTEM
                3.1          HEATING LOAD V/S COOLING LOAD CALCULATIONS
  4.0         HEAT FLOW RATES
                4.1          SPACE HEAT GAIN
                4.2          SPACE HEAT GAIN V/S COOLING LOAD (HEAT STORAGE EFFECT)
                4.3          SPACE COOLING                 V/S COOLING LOAD (COIL)
  5.0         COMPONENTS OF COOLING LOAD
  6.0         COOLING LOAD CALCULATION METHOD
                6.1          ACCURACY AND RELIABILITY OF VARIOUS CALCULATION METHODS
  7.0         DESIGN INFORMATION
                7.1          OUTDOOR DESIGN WEATHER CONDITIONS
                7.2          INDOOR DESIGN CONDITIONS AND THERMAL COMFORT
                7.3          INDOOR AIR QUALITY AND OUTDOOR AIR REQUIREMENTS
                7.4          BUILDING PRESSURIZATION
                7.5          BUILDING CHARACTERISTICS
                7.6          OPERATING SCHEDULES
  8.0         COOLING LOAD METHODOLOGY – CONSIDERATIONS & ASSUMPTIONS
                8.1          THERMAL ZONING
  9.0         CLTD/SCL/CLF METHOD OF LOAD CALCULATION (ASHRAE FUNDAMENTALS 1997)
                9.1          EXTERNAL COOLING LOAD
                9.2          INTERNAL COOLING LOADS
                9.3          HEAT GAIN FROM MISCELLANEOUS SOURCES
10.0           SUPPLY AIR CALCULATIONS
11.0          EXAMPLE
               11.1          COOLING LOAD EXAMPLE IN US UNITS
               11.2          COOLING LOAD EXAMPLE IN METRIC UNITS
12.0          COMPUTER PROGRAMS
               12.1          ELITE CHVAC
               12.2          TRACE® 700
13.0          REFERENCES
Download Here
Kindly Bookmark this Post using your favorite Bookmarking service: