Air Cooled Condensers Research Papers (original) (raw)

A New Product Introduction and Development process is one of the Corner stone's towards a competitive advantage in any market place today. A fully optimised process in combination with other lean and agile manufacturing techniques and systems is guaranteed to reduce lead-time and save on cost. New product development is a means for a company to gain advantage, secure a position, or win a new customer. The more successful and timely an organization can develop new products, the more likely it is that organization will not only survive but prosper. As suggested by review of the literature's and studies, there are several factors that significantly affect a product's chances of succeeding or failing. Many of these factors are associated with resources resulting from marketing activities that integrate the user/customer needs into the process. There is a significant amount of research that indicates that Conducting early stage marketing activities greatly improves the likelihood of new product success, yet the deficiency of these activities is one of the most commonly stated reasons for product failure by New Product Development members.

- by
- •
- Finite Element Analysis (FEA), Air Cooled Condensers

Air Cooled condensers were first introduced in US power industry in early 1970's, but only during last 10-15 years number of installations greatly increased largely due to growing attention being paid to environmental safety. Also, growing demand for water for both domestic and industrial use has brought an increased interest in use of Air Cooled condensers. This is a review paper which studies the performance of Air-cooled condenser under various operating conditions it is found that there is degradation in performance of air cooled condenser under high ambient temperatures and windy conditions. The heat rejection rate of ACC also depends on surface condition of fins and thus its performance is reduced due to external fouling of finned tubes due to weather conditions and by internal fouling from condensate (Ammonia corrosion). A Hybrid (dry/wet) dephlegmator achieves major enhancement in performance when ambient temperatures are high. Also shading of condensers is done for airconditioning units to mitigate the adverse effect of high ambient temperatures due to solar radiation. Now a day's wind walls are used to reduce the effect of high wind velocity .second option is to increase the fan speed Fin cleaning plays an important role in heat rejection. External cleaning improves air side heat transfer coefficient. In order to improve the performance of an ACC Flat tubes inclined at some angle to horizontal can also be used in place of conventional circular horizontal tubes so that an improvement in heat transfer rate occurs.

- by VN Bartaria
- •
- Environmental Science, Air Cooled Condensers, Ambient Temperatures, IJMER

Energy crisis all over the world compelled us to take necessary steps to reduce energy consumption. Heat is energy, so energy saving is one of the key matters from view point of use of refrigerants and for the protection of global environment This waste heat will affect the environmental conditions because as heat in the environment will increases it will cause global warming and also not good for our ozone layer too. By saving energy we balance the demand & supply of electricity. So it is necessary that a significant and concrete effort should be made for conserving energy through waste heat recovery system. We have tried to make a cabinet to recover waste heat from condenser from refrigeration system by storing a heat in an insulated cabinet. This heat can be used for number of domestic and industrial purposes. In minimum constructional, maintenance and running cost, this system is more useful for domestic purpose. Basically domestic refrigerator is used to store perishable goods like vegetables, fruits, milk and other beverages etc. All domestic refrigerators use air cooled finned condenser on backside. As domestic refrigerators reject large heat inside room which make us uncomfortable in summer due to temperature rise inside the room. So it is now essential to store this heat inside an insulated cabinet to utilize it for different purposes. Stored heat is used for keeping food hot, heating water which may be used for different purposes.

An air-cooled exchanger (ACHE) is used to cool fluids with ambient air. Several articles have been published describing in detail their application and economic analysis. (See Bibliography at the end of this section.) This section... more

- by Sudhir Bisen
- •
- Air Cooled Condensers

This article compares the part-load operation of air cooled and cooling tower based low-medium temperature geothermal Organic Rankine Cycle (ORC) systems installed at different geographical locations. Working fluid R245fa was compared with a newer competitor R1233zde for thermo-economic performance , environment-friendly and efficient system integration. Monthly averaged, weather data is used to simulate ambient conditions of Ulsan, London, Vegas and Kuala Lumpur. Mathematical models for condenser part load operation were formulated for both air cooled and mechanical draft wet cooling tower based systems. Numerical study and experimental validation was performed for the condenser when wet cooling tower based system was investigated. The ORC system design was optimized for maximum power output to grid and operational control optimization was performed on the heat sink to achieve maximum power output at different ambient or off-design conditions. Economic analysis was performed by comparing the capital investment/kW and levelized cost of electricity (LCOE) over the lifetime of the system. Based on the economic analysis, the results reveal that R1233zde has potential to replace R245fa working fluid when the source temperature is higher (around 145 C). Cooling tower based system are preferable for hot dry regions while air-cooled systems can be implemented with R1233zde for Ulsan and London.

- by Muhammad Imran
- •
- Economics, Optimization, Organic rankine cycle, Air Cooled Condensers

Air Cooled condensers were first introduced in US
power industry in early 1970’s, but only during last 10-15
years number of installations greatly increased largely due to
growing attention being paid to environmental safety. Also,
growing demand for water for both domestic and industrial
use has brought an increased interest in use of Air Cooled
condensers. This is a review paper which studies the
performance of Air-cooled condenser under various operating
conditions it is found that there is degradation in performance
of air cooled condenser under high ambient temperatures and
windy conditions. The heat rejection rate of ACC also depends
on surface condition of fins and thus its performance is
reduced due to external fouling of finned tubes due to weather
conditions and by internal fouling from condensate (Ammonia
corrosion). A Hybrid (dry/wet) dephlegmator achieves major
enhancement in performance when ambient temperatures are
high. Also shading of condensers is done for air-conditioning
units to mitigate the adverse effect of high ambient
temperatures due to solar radiation. Now a day’s wind walls
are used to reduce the effect of high wind velocity .second
option is to increase the fan speed Fin cleaning plays an
important role in heat rejection. External cleaning improves
air side heat transfer coefficient. In order to improve the
performance of an ACC Flat tubes inclined at some angle to
horizontal can also be used in place of conventional circular
horizontal tubes so that an improvement in heat transfer rate
occurs.

In this paper, flow and heat transfer around a compact coil condenser of a built-in refrigerator was studied numerically for various pitch values between the coils. Condenser in a housing was assumed to be cooled by an exhaust fan. This configuration is in accordance with a number of practical applications. Flow inside the housing was assumed turbulent. The fluid was assumed to be incompressible and Newtonian. The governing equations were solved by a computational fluid mechanics simulation software. The results show that when the pitch between the coils is increased, the heat transfer performance increases significantly. An increase of 27% in heat transfer rate is seen when the pitch value is increased from 6mm to 10mm. Further increase in the pitch value from 10mm to 12mm provides an extra 9% increase in heat transfer rate. As the increase in pitch value also increases condenser length, the pitch value of 10mm can be considered an optimum value when there is a strong restriction on space in chassis region.

- by Kamil Kahveci and +2
- •
- Helical Coil, Air Cooled Condensers

This work deals with Power Plants Technology. We here take an interest on how to maximize the work delivered by the steam turbines using the so-called Thermo Vacuum Pump (TVP). This work represents a design innovation paper proposed in a theoretical emphasis.
There is a knowledge gap in utilizing the Condensation in maximizing the overall efficiency of the Thermal Power Plants. The paper basically aims to propose the TVP as a new method to close this gap where the Air Cold Condenser type is used.
Thermo vacuum pump (TVP) is a thermodynamic machine increases and controls the vacuum at the steam turbine outlet by circulating specific amount of condensate, or steam in some cases, and injecting it in engineering manner into the steam stream at the condenser inlet again.
This paper justifies the research results using theoretical equations because the paper is aimed at providing a basic knowledge about the TVP. However, the paper confirms the validity of a new design opportunity, in principle, which needs further work out in the future.
Anyhow, installing TVP will basically (1) enable to increase the loading capacity of the steam turbine at winter and (2) enable to reduce the load reduction at summer.

- by Mohammad Qasim
- •
- Energy efficiency, Condensation, Air Cooled Condensers, Thermal Power Plants

The relevance of product innovations and new product development for the Competitive performance of firms and for the long-term economic growth is a known and recognized topic. In the context of the power plant & process industry, process and product innovations are usually the result of cross-discipline ideas, involving, for instance, biology, chemistry, technology, engineering, nutrition and law. This paper presents a quantifying and reordering method for new product development based on the concurrent engineering concept. We can realize deeply the inner hierarchy workings of concurrent engineering in the new product development process. The purpose of this paper is to develop a dynamic planning method that is innovative, efficient and flexible for new product development by using the concurrent design concept. It ultimately helpful to designers and managers to grasp the interactive information flow between each of the activity factors for planning an optimum design process in new product development. One case study is employed to illustrate this method and the results validate that it can reduce the iterations of design process and shorten the product development time with cost effectiveness.

- by Dr. Pushpdant Jain
- •
- FEA with ANSYS, Air Cooled Condensers

A fully optimised process in combination with other lean and agile manufacturing techniques and systems is guaranteed to reduce lead-time and save on cost. New product development is a means for a company to gain advantage, secure a position, or win a new customer. The more successful and timely an organization can develop new products, the more likely it is that organization will not only survive but prosper. (2) As suggested by review of the literature's and studies, there are several factors that significantly affect a product's chances of succeeding or failing. Many of these factors are associated with resources resulting from marketing activities that integrate the user/customer needs into the process. There is a significant amount of research that indicates that Conducting early stage marketing activities greatly improves the likelihood of new product success, yet the deficiency of these activities is one of the most commonly stated reasons for product failure by New Product Development members.