Cop

Carnot

4.72 hp/ton

10 r on

12,000 Btu/h 10

The total heat rejected from the refrigeration cycle (Qout) equals the rate of heat removal (or load) plus the work input (vapor compression cycle) or high-temperature heat input (absorption cycle) computed as follows:

In the above example, the total heat rejected from the cycle would be 12,000 Btu/h (3.515 kWr), which was the heat removal rate, plus 1,200 Btu/h (0.352 kWJ), which was the work energy required, for a total rate of 13,200

Energy Efficiency Ratio

Energy Efficiency Ratio (EER) is a term used in the United States to quantify the efficiency of electric-driven refrigeration systems. EER is defined as:

Refrigerant effect (i„ Btu/h)

Work input (in watts) (Btu/watt-h)

Wcycle

This leads to the following convenient relationships:

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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