You simply remove the tie bolts and slide back the movable frame. The plate pack can then be inspected, pressure cleaned, or removed for refurbishment if necessary.
Expandable
A significant benefit of the plate heat exchanger is that it is expandable, allowing an increase in heat transfer capability. As your heat transfer requirements change, you can simply add plates instead of buying an entire new frame unit, saving time and money.
High Efficiency
The pressed plate patterns and narrow gaps allow for very high turbulence at relatively low fluid velocity. Combined with counter directional flow results in very high heat transfer coefficients.
Compact Size The high efficiency requires less heat transfer area resulting in a much smaller heat exchanger than would be necessary for the identical effectiveness of other heat exchanger types. Typically a plate heat exchanger requires 20-40% less space than required by a shell & tube heat exchanger.
Close Approach Temperature
The same features that give the plate heat exchanger its high efficiency also makes it possible to reach close approach temperatures which is particularly important in heat recovery and regeneration applications. Approach temperatures of 1ºF are possible.
Multiple Duties in a Single Unit
The plate heat exchanger can be built in sections, separated with simple divider plates or more complicated divider frames with additional connections. This makes it possible to heat, regenerate, and cool a fluid in one heat exchanger or heat or cool multiple fluids with the same cooling or heating source.
Avoid cross contamination
Each medium is individually gasketed and as the space between the gaskets is vented to the atmosphere, cross contamination of fluids is eliminated.
Less Fouling
Very high turbulence is achieved as a result of the pattern of the plates, the many contact points, and the narrow gap between the plates. This combined with the smooth plate surface reduces fouling considerably compared to other types of heat exchangers.
Lower Costs
High heat transfer coefficients mean less heat transfer area and smaller heat exchangers, and sometimes even less heat exchangers. This and less space requirements, reduced flow rates, and smaller pumps means.
ADVANTAGES OF SHELL AND TUBE HEAT EXCHANGERS
The shell and tube design in heat exchangers represents one of the most traditionally used configurations, due to its good operation and versatility. The main advantages of tubular heat exchangers are as follow:
Low maintenance costs.
High working pressure.
High working temperatures.
Processing of particulate or fibre products.
High security in aseptic processes.
Easy inspection and disassembly.
Easy to enlarge.
They can be designed and manufactured to bear very high pressures
They have extremely flexible and steady design
They can be designed and manufactured to bear very high and very low temperatures
They are resistant to thermal shocks
They have no dimension limit
They can be used in all applications
Pressure loss is at a minimum and can be maintained at a minimum in line with the process purpose.
They can easily be disassembled and assembled back for maintenance, repair and cleaning
Easy maintenance and repair
Pipe diameter, pipe number, pipe length, pipe pitch and pipe arrangement can be altered. So, the designs of tube heat exchangers are quite flexible
ADVANTAGES OF FINNED TUBE HEAT EXCHANGERS
Robust construction of finned tube heat exchanger that can withstand operating conditions over a long period.
Maximum transmission quality.
High condensation rate.
Wide application and temperature spectrum (range)
Ideal for gas-liquid or gas-vapor heat transfer.
Increase Heat Transfer Rate:
A finned tube exchanger typically has tubes with fins attached to the outside. Usually, there will be some liquid flowing through the inside of the tubes and air or some other gas flowing outside the tubes, where the additional heat transfer surface area due to the finned tube increase the heat transfer rate. In a crossflow fin tube exchanger, the fins will typically be radial fins and they’ll either be circular or square in shape.
Improve Heat Transfer Coefficient:
By not using a finned tube, the outside surface area is not significantly greater than the inside surface area. Because of which, the fluid with the lowest heat transfer coefficient will dictate the overall heat transfer rate. When the heat transfer coefficient of the fluid inside the tube is several times larger than that of the fluid outside the tube, the overall heat transfer rate can be greatly improved by increasing the outside surface area of the tube.
Increase Outside Surface Area:
By having a finned tube in place, it increases the overall heat transfer rate. Finned tubes increase the outside surface area. This decreases the total number of tubes required for a given application which then, also reduces overall equipment size and can in the long-run decrease the cost of the project.
Finned tube heat exchangers are used in a variety of applications, and more so as industrial heat exchangers. An air heat exchanger like the evaporator coil in an air conditioning unit is typically a fin tube exchanger. Another common fin tube air heat exchanger is the car radiator. The purpose of the car radiator is to cool the hot water in the tubes with the air passing through in crossflow. On the contrary, the air conditioner evaporator coil has the purpose of cooling the air passing through it. The finned tubes that are manufactured at Kainon Boilers, use high grade carbon steel, stainless steel, copper, brass, and aluminum. Our finned tube exchangers are designed to meet the specific duty condition, temperature and pressure of the fluids.
ADVANTAGES OF SURFACE CONDENSER
The condensate can be used as boiler feed water.
Cooling water of impure quality can be used because the cooling water does not come in contact with steam.
High vacuum (about 735 mm of Hg pressure) can be obtained in the surface condenser. This increases the thermal efficiency of the plant.