Tp2 RTosdJ

11. Distance between an internal coil and the side wall or bottom of the tank or vessel is a minimum of 8 in. and a maximum of 12 in. (dimension "c").

12. All coils should be evenly supported at a minimum of three places. Supports should be evenly spaced and allow for thermal expansion of the coil.

13. Coils should be sloped a minimum of in. per foot to allow for drainage.

14. Certain flow rates in spiral coils can set up harmonic vibrations that could ultimately be destructive to the coil, supports, etc. In addition, slug ilow can cause extreme coil movement. If vibration or movement becomes a problem, then either the How rate or the coil support arrangement must be changed.

15. Limit velocity to 10 feet per second in coils.

16. The "steady-state" condition requires less coil than any other design condition.

17. If pressure drop is excessive, the coil may be split into multiple coils with manifolds or separate inlets or outlets.

Types of Coils



Angular offset

Circular Harp Note:

Direction of flow will vary depending on the heating or cooling application

Ring header (typ)


T = time to lieat = 1 hr • iMg mean temperature difference, AT.

GTD = t, - t2 = 300 - 60 = 240 LTD = t, - t3 = 300 - 200 = 100

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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