Since one ton of refrigeration is equal to 12,000 Btu/h and one hp is equal to 2,545 Btu/h, the energy required to produce one ton of refrigeration, expressed in hp/ton, as shown in Equation 33-2, is 4.72/COP. In SI units, this would be expressed as:


If, in the previous example where the COP was found to be 10, the heat removal rate was 12,000 Btu/h, the work required, based on Equation 33-2, would be calculated as:

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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