What is a compact heat exchanger give examples?
A compact heat exchanger (CHE) is a piece of equipment built for efficient heat transfer from one medium to another, being characterised by large heat transfer area-to-volume ratio (minimum 300 m2/m3), high heat transfer coefficients (up to 5000 W/m2K), small flow passages, and laminar flow.
Where are compact heat exchangers used?
Compact heat exchangers are ideal for small batch processes, point-of-use streams, research and development and pilot scale applications. These smaller shell and tube heat exchangers are often incorporated into air conditioning and heating systems, or used as a means to capture wasted heat within a larger process.
How can compact heat exchangers be classified?
A liquid/two-phase fluid heat exchanger is referred to as a compact heat exchanger if the surface area density on any one fluid side is greater than about 400 m2/m3.
What are the classification of heat exchangers?
Heat exchangers are classified according to transfer processes into indirect- and direct- contact types. FIGURE 1.2 (a) Classification according to process function; (b) classification of condensers; (c) classification of liquid-to-vapor phase-change exchangers.
What is the smallest heat exchanger?
HXP-135
The HXP-135 is a proprietary Koolance design, and possibly the smallest heat exchanger of its kind. It is made of copper-brazed stainless steel and plated externally in nickel.
What are applications of compact heat exchanger?
Compact heat exchangers are widely used for heat integrating process and provide advantages over shell-and-tube heat exchangers, such as compactness, large surface area per volume ratio, the low temperature different, and can be applied as MHEX.
What is shell-and-tube type heat exchanger?
As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids.
How are heat exchangers classified?
Which type of heat exchanger is more efficient?
Plate exchanger is the most efficient due to turbulent flow on both sides. High heat-transfer coefficient and high turbulence due to even flow distribution are important. However, a plate heat exchanger regenerator is restricted to low viscosities. With high viscosities, a special tubular may be required.
How does a compact heat exchanger work?
The basic principle of these heat exchangers is to insert a bundle of plate in a shell. On the plate side, the fluids flow inside corrugated or embossed channels (more often in two passes). On the shell side, the flow is similar to shell and tube heat exchangers, and baffles can be inserted.
What is a hairpin heat exchanger?
Hairpin heat exchangers use true counter-current flow. Unlike multi-pass shell and tube designs where correction factors are used to account for inefficiencies resulting from co-current passes, this process maximizes temperature differences between shell- and tube-side fluids.
What is TEMA heat exchanger?
The acronym TEMA stands for “Tubular Exchangers Manufacturers Association”, it is a trade association of leading manufacturers of shell and tube exchangers who have been pioneers in the research and development of heat exchangers.
Which metal is best for heat exchanger?
Generally, the two most commonly selected materials for heat exchangers are aluminium and copper. Both metals have the optimum thermal properties and corrosion resistance to make them ideal choices, with most of the differences being application-specific.
Do you know the different types of heat exchangers?
What are the different types of heat exchangers? There are several different types of heat exchangers – two of the most common include shell and tube heat exchangers and plate heat exchangers. The most common type is a tube (or shell and tube) heat exchanger. These heat exchangers contain a single tube or several parallel tubes (called a tube
Energy efficiency improvements of plant systems
Which method is preferred for heat exchangers?
Circulation of sponge rubber balls[39]The technique is capable of preventing the accumulation of particulate matter,biofilm formation and scale and corrosion product deposition.
What are heat exchangers and how do they work?
Plate type heat exchangers This is a type of heat exchanger that transfers heat from one medium to another through identical thin plates either made of stainless steel or