How big can heat pipes be?

How big can heat pipes be?

Spacecraft heat pipes are usually under 10 feet (3 m) long, and the extra length is allowed because they operate in zero gravity. When a heat pipe works with gravity, called a thermosyphon, the length can be virtually unlimited, and you’ll find many in lengths up to hundreds of feet (m).

What is the difference between a heat sink and a heat pipe?

Smaller heat sink reduces the weight of the luminaire dramatically. This reduces transportation costs as well as the amount of other materials needed. The Heat Pipe effectively transfers heat from the heat source and as a result makes the cooling faster than ever.

How much heat can a heat pipe transfer?

The maximum temperature for long term water heat pipes is 270 °C (518 °F), with heat pipes operating up to 300 °C (572 °F) for short term tests.

How thick are heating pipes?

Most common thickness for heat pipes is 0.3mm. For heat pipes that require milling, the thickness is about 0.4 to 0.5mm.

How do I choose a heat pipe?

When selecting the diameter and length of heat pipe it is important to consider the orientation with respect to gravity and overall heat load for the thermal system. The transport of vapor within the heat pipe is responsible for the thermal conduction from one end to the other.

Which pipe is best for hot water supply and why?

CPVC pipes are an ideal choice for hot water plumbing. They are made after adding material that goes through extra chlorination process which gives CPVC higher quality.

Are heat pipes expensive?

Are heat pipes expensive? Compared with traditional (and less effective) heat transfer methods such as aluminum extrusions and cast heat sinks, heat pipes can have a higher initial cost. That is why heat pipes are not recommended for applications where cooling can be performed by simple conductive heat sinks.

Which limit can lead to choking of flow in heat pipe?

Viscous forces prevent vapor flow within the heat pipe. Heat pipe operating near triple point with a very low vapor pressure – need to use a different working fluid. Vapor flow reaches sonic velocity when leaving the evaporator, choking the flow.

What is a double pipe heat exchanger?

The double pipe heat exchanger is a small, modular design that is most useful in applications where conventional shell and tube exchangers are too large or too expensive to use. Double pipe exchangers can be paired in series or in parallel to increase the heat transfer rate through a system without complication.

What are the different types of heat pipe?

Our heat pipe includes Groove, Mesh and Sinter type, each has the advantages and trade-offs over thermal performance and manufacturing, so you are welcome to contact us before selection. The groove wick is formed on the tube itself, it’s a cost effective solution with very stable thermal performance.

What are the standard heat pipe dimeters?

The standard heat pipe dimeters is D3, 4, 5, 6, 8 and 10mm, length, flattening thickness and bends can be customized to fulfill the mechanical request from customers. Table 1 below shows the minimal suggested bending radius for different diameter heat pipes, Table 2 lists the width of flattened heat pipe for designer’s reference.

What is the thermal performance of a dual-diameter structure?

Owing to mentioned reasons, unbalanced capillary/gravitational force and greater heat exchange surface obtained from dual-diameter structure, the dual-diameter configuration’s thermal performance is much better in comparison with the single-diameter configuration under medium and high FR values, defined as 50%–60% and 60%–70%, respectively.