Who invented heat exchanger

The plates used in a plate and frame heat exchanger are obtained by one piece pressing of metal plates. Stainless steel is a commonly used metal for the plates because of its ability to withstand high temperatures, its strength, and its corrosion resistance. Home Plate Heat Exchanger Introduction. What is a plate heat exchanger? Further, the invention makes possible the sealing off of a leaking tube group without shutting down or draining the entire system.

This advantage is obtained with a minimum reduction in capacity where the number of tube groups is large. Further, the multiple header arrangement, by reducing metal thickness in the pressure parts, reduces the cost of the exchanger correspondingly. The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specification.

For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which are illustrated and described preferred embodiments of the invention. In FIGS. The shell 12 is constructed with a portion 18 of its cylindrical wall of a greater metal thickness than the remaining portions of the shell. Suitable nozzles 20, 22, are provided for passing a heat transfer fluid through the shell Disposed within the shell there is a bundle 24 of U-shaped tubes with each tube having end portions 26 laterally extending in a vertical plane perpendicular to the vertical plane of its U-bend as the tube ends pass through the wall of the shell The ends of the tubes of each group pass through an opening 23 in the wall of the shell 12 and are connected to fluid chambers 30 which are integrally attached to the shell 12 at spaced positions along the thick portion 18 of the shell.

Further, each heat transfer element is a double tube and is composed of an outer tube 28 and inner tube The double tubes are constructed so that the outer tubes 23 have an increased diameter at the degree and degree bonds to provide for dilferential thermal expansion of the inner tubes Each chamber when arranged for a double tube connection has a fluid space 32 formed by the outer tube sheet 34 and closure head Arranged in each head 36 are the fluid nozzle 38 and the inspection fitting A second fluid chamber 40 is formed by the outer tube sheet 34, the inner tube sheet 42, and a cylindrical portion The inner tube sheet 42 is integrally attached to the shell 12 by the extension tube In the late 30, Sweden produced the first plate-shell heat exchanger for use in pulp mills.

During this period, in order to solve the heat transfer problem of strong corrosive media, people began to pay attention to the heat exchanger made of new materials. Around the 60, due to the rapid development of space technology and cutting-edge science, the urgent need for a variety of high-efficiency compact heat exchangers, coupled with the development of stamping, brazing and sealing technology, heat exchanger manufacturing process has been further improved, thus promoting the vigorous development and wide application of compact plate-surface heat exchangers.

In addition, since the 60 's, the typical tubular heat exchanger has been further developed in order to meet the needs of heat exchange and energy saving under high temperature and high pressure conditions. In the middle of the 70, in order to enhance heat transfer, a heat pipe heat exchanger was created on the basis of research and development of heat pipe. Following are details on the construction and some of the applications of each.

As hot water goes down the drain, the GFX efficiently transfers the heat through the walls of the copper drain line to the cold water as it simultaneously flows up through the supply coil. The GFX is constructed in a large variety of sizes with additional options for customization. Unit lengths typically range from 20" to 80".

Manifolded units are commonly used for commercial applications. The variety and versatility of GFX systems can fit the designer and engineer's imagination. The plumbing systems of such locations have the perfect mix of waste heat and demand for hot water to justify using GFX systems for preheating water. The GFX is a counter-flow heat exchanger. In its most common application it is installed vertically as a section plumbing drain line.

The cold supply line goes into the bottom of the GFX outer coil, and then the top of the coil is connected to the incoming cold water line just before the water heater, directly to the cold side of the shower fixture, or to both. The GFX recovers heat if the warm wastewater is flowing at the same time as the cold supply water. This is easy for showers and sinks; however, to recover heat from batch processes such as bathtubs, clothes washers and dishwashers there must be a second demand for cold water supply occurring as the batch is draining or shortly after.

This can easily be done with a little effort in residential situations, and with some synchronization in commercial applications. Little, Inc. Department of Energy. Example: Figuring the potential energy in shower drain water per minute shower, here is the calculation:. For a 3.