Heat Exchanger Articles & Analysis

The study of flow and heat transfer in a vertical annulus is important due to its applications in the cooling of reactors, industrial heat exchangers, microelectronic devices, and so forth. The aim of the present work is to estimate the operational costs due to entropy generation in an annulus with isoflux boundary conditions. For this purpose, the governing equations are simplified and solved ...

By Inderscience Publishers

Since the first spiral heat exchanger was proposed back in the 19th century, they have become synonymous with the treatment of slurries and wastewater. However, in many situations the performance of a corrugated tube heat exchanger is equal to or better than that of a spiral design. Corrugated tube designs also provide a number of additional advantages in terms of day-to-day operation and ...

By HRS Heat Exchangers Ltd.

A Generalised Mean Temperature Difference (GMTD) method instead of the Logarithmic Mean Temperature Difference (LMTD) method for heat exchangers is proposed. Unlike the LMTD method, the GMTD method allows the performance analysis of heat exchangers with distributed physical properties. GMTD is calculated by a new method to take fluid temperature profiles as a function of heat load. Mathematical ...

By Inderscience Publishers

This work presents the results of tests and simulations of the behaviour of an experimental facility called Natural Circulation Loop (NCL) when different volumes of noncondensables are trapped in the top header of the heat exchanger and with the system operating in a two-phase flow. The main objective of this project is to study the behaviour of a passive emergency cooling system of advanced ...

By Inderscience Publishers

In the present work, an improved Entropy Generation Minimisation (EGM) approach aiming at minimising the revised entropy generation number which is the non-dimensionalised entropy by the ratio of heat flow to the input temperature of the cold fluid is developed for a plate-fin heat exchanger design with multiple design variables with the help of genetic algorithm. It is found that the approach ...

By Inderscience Publishers

A novel use of evaporation using heat exchanger technology from HRS Heat Exchangers has increased drying capacity for a major European processor of cheese products. ...

By HRS Heat Exchangers Ltd.

A novel prototype thermoelectric domestic-ventilator with air-conditioning heat recovery of exhaust had been made and tested in this paper. A thermoelectric heat exchanger is integrated with a flat-fin cross-flow heat exchanger in this ventilator. This ventilator is investigated and its cooling (or heating) performance evaluated in terms of the Coefficient of Performance (COP), cooling and ...

By Inderscience Publishers

When you are looking for an efficient method for enclosure cooling, a heat exchanger is a good solution for a few different reasons. Not only is a heat exchanger energy efficient, but it allows you to maintain a completely closed loop enclosure cooling solution. The way a heat exchanger operates is by employing a heat pipe principle to exchange heat from an electrical enclosure to the outside. ...

By Thermal Edge Inc.

The Next Generation Nuclear Plant project is aimed at the research and development of a helium-cooled high-temperature gas reactor that could generate both electricity and process heat for the production of hydrogen. The heat from the high-temperature primary loop must be transferred via an intermediate heat exchanger to a secondary loop. Using RELAP5-3D, a model was developed for two of the heat ...

By Inderscience Publishers

HRS Heat Exchangers has supplied a leading Mexican orange juice producer with a complete pasteurisation system that uses a novel electrical heating method – Ohmic. The new system maintains the properties of freshly squeezed juice, which are adversely affected during traditional pasteurisation processes, allowing the company to increase its presences in the lucrative North American ‘as ...

By HRS Heat Exchangers Ltd.

A process for converting Compressed Natural Gas (CNG) to Liquefied Natural Gas (LNG) is modelled thermodynamically and effects of design and operating parameters on exergy destruction and performance of the process are studied. Results show that CNG pressure, pressure after Joule?Thomson valve, and temperature of CNG after heat exchanger of refrigerating system have significant effects on optimum ...

By Inderscience Publishers

This paper presents an experimental investigation on combined energetic and exergetic performance characteristics of a corrugated plate heat exchanger using water. On the basis of experimental data considering heat exchange with ambient, various energetic and exergetic performance parameters have been evaluated and discussed their interrelationship. General relationship between energy ...

By Inderscience Publishers

Ensuring product safety is the number one priority for any producer of pharmaceutical products, and a key aspect of this is avoiding contamination during production. Design and construction plays a key role in achieving this, and the heat exchangers used for processes such as pasteurisation and sterilisation are no exception. There are three main elements to preventing contamination occurring in ...

By HRS Heat Exchangers Ltd.

Heat Exchangers Coolers (Air Coolers, Water-Coolers etc.) ...

By VELTRUP Prozesstechnik GmbH

With 40 years’ experience as a company, our engineers and sales staff have encountered a wide range of issues on sites. Here are ten of the most common mistakes that can occur as a result of poorly-specified or badly-installed heat exchanger systems – and how you can avoid ...

By HRS Heat Exchangers Ltd.

Increasing production capacity and setting a monthly production record are targeted goals for all manufacturers. To achieve this, all equipment and systems must work in perfect unison and perform to optimal efficiency. The Situation A large specialty chemical manufacturer located in Ohio was experiencing unsatisfactory production levels due to the plant’s old, outdated, inefficient ...

By National Oilwell Varco (NOV)

The most effective fluid to stabilize the operating temperature in oil systems is water. Water/ Oil plate heat exchangers are used to cool down hydraulic oil or other fluids using water as a cooling medium. Internal cooling circuits as typically found in large production facilities and other cooling water sources supply water at temperatures that provide sufficient delta T compared to the oil ...

By Shanghai Accessen Group Co., Ltd.

Thermal conductivity is significantly affected by fouling, a thin insulating layer or film that accumulates on heat transfer surfaces. In fact, a fouling layer of just one thousandth of an inch (0.001") increases system power requirements by 10%. Fouling can be caused by biofilm or suspended solid particles that settle on heat exchangers. Side stream filtration with Pathex antimicrobial filter ...

By AS Filtration, LLC

Gas-to-gas heat exchangers are increasingly being used to recover low-grade heat (or cooling) to reduce energy requirements for space heating, drying and other applications. The efficiency of heat recovery is often limited by practical considerations which could – in principle – be reduced or eliminated by development of new materials and technology. However, this paper posits a fundamental ...

By Inderscience Publishers

When operating in exceptionally challenging conditions, or handling difficult materials such as sewage and wastewater sludges, even the best designed heat exchangers will be susceptible to fouling. Understanding the different types of fouling and what causes them will help engineers and operators pick the best type of heat exchanger for their particular application and keep it running in optimum ...

By HRS Heat Exchangers Ltd.