Consider a building whose annual air-conditioning load is estimated to be 120,000 kWh in an area where the unit cost of electricity is $.10/kWh. Two air conditioners are considered for the building.
Air conditioner "A" has a seasonal average COP of 3.2 and cost $5500.00 to purchase and install.
Air Conditioner "B" has a seasonal average COP of 5.0 and cost $7000.00 to purchase and install.
All else being equal, determine which air conditioner is a better buy.
The COP is given by:
COP = Q/W
Where Q is the heat removed, while W is the work used by the AC unit.
Now, the AC load (heat to be removed) is 120,000 kWh per year. This means that an AC with COP of 1 ...
The solution compares cost efficiency of two A/C units based on COP. The comparison allows to determine which air conditioner is a better buy.