Gas Purity

Significant errors will arise if gas purity is not accounted for. It should be noted that the code lays down no conditions for this, and a figure of 99% or better should be targeted. In order to obtain a good purity at the start, all pipe joints should be taped and the system evacuated to a low vacuum several times with intermediated purging with the test gas to remove the residual contaminants.

Change in molecular weight affects the equivalent speed-measured head and density. This means that monitoring of gas purity must be carried out throughout the test. In any event, loop capacity is usually small and gas should be added and vented during the course of the test as the test discharge pressure changes. To ensure adequate mixing and to avoid stratification in the case of refrigerant gases, the gas should be injected up stream of the gas cooler.

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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