Addressing the Challenges of HVAC System Installations with Air Condition Load and Cooling Calculators for Efficient Outcomes
Every building is unique in terms of size, material, ventilation, number of windows, insulation, and even the orientation and location of the rooms. All of these are important factors to consider when using an air conditioning loadcalculator to provide effective cooling, dehumidify the air, and improve indoor air quality. It would be difficult to increase the efficiency and comfort level of your building without an accurate analysis of these factors. Additionally, it may also result in increased energy usage. A cooling load calculator provides building service engineers with data to evaluate the possibilities for load reduction, and provide information for the selection of right equipment, system size and design.
The heat gain and loss through a building depends on a number of factors such as:
- The
amount of insulation in ceilings and walls
- Shades
on the windows, roofs, and walls
- Air
leakages into indoor spaces from outside
- The
temperature difference between outside and the desired temperature
- Heat
generated by the appliances
- Number
of occupants
- Amount
of lighting in the room, and
- Activities
being conducted, and other equipment within a building
The above factors will influence the efficiency of air
conditioning, the performance of the equipment, its durability, and its cost.
As a result, building service engineers employ software that assists them in
selecting the appropriate size and design of the HVAC system, as well as in
increasing the speed of installation. Some popular cooling load calculators and
air conditioning load calculators used by vendors, contractors and building
engineers in Australia, New Zealand and other countries of the world are
described below:
CAMEL air conditioning load
calculator
CAMEL air conditioning load calculator by leading
building services software provider ACADS-BSG calculates the design heating and
cooling loads, and associated psychrometrics for air conditioning plants in
buildings. It models a range of types including constant volume heating and
cooling, VAV with and without reheat, reverse cycle heat pumps, and evaporative
coolers.
Key features of CAMEL cooling load
calculator include:
- The computer program performs an hourly cooling load analysis taking account of thermal storage on a design day in each month of the year.
- Specific monthly 3 pm design dry and wet bulb temperatures are available in CAMEL air conditioning load calculator for over 600 locations in Australia and many other offshore locations.
- Air quantities can be entered at room or zone level as I/s/person with plant fresh air quantity then determined using the Compartment Formula from AS1668-1991 for multiple rooms and zones.
- Wall interiors can be of any azimuth and the entire building can be easily rotated.
- The air conditioning cooling load calculator calculates chiller, AHU, zone, and room loads and air quantities, and reheat quantities with and without coil reset and room temperatures.
- Buttons on the toolbar and special keys allow the user to copy individual values, columns of data, or complete screens from zone to zone, making data entry easy and fast.
- The summary results of CAMEL cooling load calculator include summary table of loads and air quantities, load charts, tables of check figures, etc. The results can also be displayed graphically, and a Psychrometrics Chart is provided for each AHU.
KOALA for air conditioning load estimation
KOALA computer program by ACADS-BSG is a cut down
version CAMEL cooling load calculator and is designed for use in small
commercial and residential buildings. It produces a chart of up to 10 zones in
a building,
Other key features of KOALA air
conditioning load calculator
- The computer program can be used to analyse buildings in the Northern and Southern Hemispheres, and users can enter their own design conditions for locations not provided in the cooling load calculator.
- Graphics are provided on the windows and external walls & roofs screens to assist users with checking their input data.
- Air quantities for each zone are provided in KOALA air conditioning load calculator based on leaving coil temperature or by-pass factor entered by the user.
- Internal loads of KOALA computer program include people, lights, and equipment, both for sensible and latent heat.
- “U values” for a wide range of walls and roofs are stored in KOALA cooling load calculator which can be accessed via a dropdown list on the external screens.
- The results of KOALA compute program include heating load chart for each zone. Templates are provided to allow for a number of present result selections. The tables include the summary results for each zone and tables of cooling loads and air quantities for each zone and for the sum of all zones.
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