heat exchanger performance Articles
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Comparative study of the effect of fouling on heat exchangers performance based on the first and second laws of thermodynamics
An extensive investigation of the effect of fouling on heat exchangers performance has been carried out based on the first and second laws of thermodynamics. Non-dimensional fouling thermal resistance is firstly defined, and five typical criteria in terms of heat transfer units number, heat transfer effectiveness, exergy transfer units number, exergy transfer effectiveness and non-dimensional ...
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Assessing product properties for optimal heat exchanger performance
In every situation where a heat exchanger is required, the combination of products and service fluids, application, temperature and other variables will be different. Understanding these properties ensures the correct heat exchanger is supplied. For example, high fouling materials may require a scraped-surface unit. Having adequate information will also ensure that the heat exchange process does ...
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Side Stream Filtration and Heat Exchanger Efficiency
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 ...
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Free worm gear design online of worm reducer have the best market
RV reducer is one of the more common reducers in the worm gear design online family. It consists of a worm and a worm gear. It has a compact structure, a large transmission ratio, and a transmission mechanism with self-locking function under certain conditions. It is the most commonly used. One of the worm gear design online has low vibration, low noise and low energy consumption.一、The typeThe ...
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Case study - Air-to-air heat exchanger provides plant heat and big savings
OVERVIEW A food processing facility installed a new Regenerative Thermal Oxidizer (RTO) for odor control from its roasting operation. The oxidizer was designed for 95% thermal rate of efficiency and included supplemental fuel injection (SFI) which is used during low VOC loading conditions, to help save fuel cost. The customer was looking at additional ways to further reduce their operating ...
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The benefits of heat regeneration in heat exchanger systems
Heat exchangers which employ heat recovery or regeneration should not be confused with ‘regenerative heat exchangers,’ which are a specific type of heat exchanger. What we mean by heat regeneration at HRS is the recovery of as much surplus heat (or cooling capacity) as possible after the primary function of the heat exchanger has been performed. This can then be reused to either ...
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On-Vehicle Exhaust Gas Cooling in a Diesel
ABSTRACT A diesel emissions control system built and tested on an industrial forklift truck is described. The system utilizes a pleated media type diesel soot filter. The temperature limit of the filter material is well below the temperature of the exhaust gas. Therefore, cooling of the exhaust gas is necessary. A finned-tube heat exchanger is included in the system to cool the exhaust gas to ...
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The performance and emission characteristics of a diesel engine using preheated Kusum oil and Kusum diesel blend
Rapidly depleting conventional petroleum resources have prompted research for alternative fuels. Among various possible options for internal combustion engines, fuels derived from triglycerides (vegetable oils/animal fats) are a promising substitute for diesel fuel. Vegetable oils pose some detrimental characteristics like high viscosity and low volatility compared to diesel fuel. In the present ...
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A novel underground solar thermal heat storage unit cum heat exchanger for non air-conditioned buildings
A novel passive space conditioning configuration is presented, integrating a Solar Collector System, Underground Storage Tank and Novel Heat Exchanger. This Underground Solar Thermal Heat Exchanger (USTHE) provided improved sensible heating/cooling of air by employing a Novel Heat Exchanger (NHX). The dynamic performance of the storage tank in USTHE is modelled using the finite difference method ...
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Energy from Waste (EfW)
To recover energy from waste is a necessary and useful part of the whole waste management process. Inciner8 have developed the first truly mobile waste to energy solution in their EfW range of equipment. Using new technology they have devised the optimal way to create energy from waste and make it useable for multiple applications ranging from disinfection, heating, washing or the generation of ...
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Case study - Heat exchanger retrofit
Overview A manufacturer of insulation films for the electronics industry needed to evaluate the capabilities of four existing oxidizers that treated emissions from its coating lines. The company was concerned that, due to oxidizer deficiencies, it would not meet regulatory requirements. The oxidizers had been manufactured by two different companies. One of them was no longer in business; the ...
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Understanding and preventing heat exchanger fouling
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 ...
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Product focus: Horizon+ rotary boiler
We’re super proud to be the UK’s exclusive distributor of Sugimat’s industry-leading Waste-to-Energy boilers – and we recently signed an exclusive deal to continue this for the next five years. In fact, we were recently interviewed by MRW about Sugimat’s latest technology – the Horizon+ boiler – which we’ve brought to the UK’s waste and ...
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HRS helps AD plant tap into additional heat from existing CHP
Operators of anaerobic digestion (AD) plants know how important it is to optimise energy use across all stages of the process. That is why many recapture as much heat as possible for reuse elsewhere, including from the hot exhaust gases generated by the combined heat and power (CHP) engines which turn the biogas from the AD plant into useful heat and electricity. Heat exchangers used for exhaust ...
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Comparative performance analysis for endoreversible simple air heat pump cycles considering ecological, exergetic efficiency and heating load objectives
The performance analysis and optimisation of endoreversible simple air heat pump with constant-temperature heat reservoirs is carried out by using finite-time thermodynamics. The expressions of the heating load, the exergetic efficiency and the ecological function of the cycle are derived. The influences of the pressure ratio of the compressor and the allocation of heat exchanger inventory on the ...
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Second law analysis of a multiport serpentine Micro–Channel Slab Heat Exchanger
Second law analysis is recognised as an effective tool to determine the thermodynamic performance of many systems. In the present work, it is used for a steady–state multiport serpentine slab cross–flow Micro–Channel Heat Exchanger (MCHX) to analyse its thermodynamic performance. Micro–scale devices have been widely used due to advancements in micro–scale fabricating technologies. This type of ...
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Two non-dimensional exergy transfer performance parameters of heat exchanger
A new non-dimensional performance parameter, exergy transfer units number, which is in conjunction with exergy transfer effectiveness, is proposed to evaluate exergy transfer performance of heat exchangers operating above/below the surrounding temperature. The analytical expressions of exergy transfer units number are derived, and the relationship between exergy transfer effectiveness and ...
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Optimum distribution of heat exchanger inventory and optimum thermal capacitance rate matching for power optimisation of a regenerated closed Brayton cycle
The power output of the cycle is taken as objective for performance analysis and optimisation of an irreversible regenerated closed Brayton cycle coupled to variable-temperature heat reservoirs. The analytical formulae about the relations between power output and pressure ratio are derived with the heat resistance losses in three heat exchangers, the irreversible losses in the compressor and ...
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Exergoeconomic analysis of an olive oil refining plant
This study deals with evaluating the performance of an olive oil refinery plant installed in Izmir, Turkey, using Exergy, Cost, Energy and Mass (EXCEM) method, which is based on the real operational data and costs of the equipments. The most efficient equipment is obtained to be the shell and tube type heat exchanger with an exergy efficiency value of 85.8% at 25°C, ranging from 86.2% to 85% for ...
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A generalised mean temperature difference method for thermal design of heat exchangers
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 ...
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