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شیر انبساط Expansion Valve
30Oct

Expansion Valve

Radairan Company is one of the pioneers in the field of equipment and HVAC systems, engaged in the examination and production of diverse products in this area. In equipment that operates based on the refrigeration cycle, important processes take place, each performed by specific components such as evaporators, condensers, compressors, or expansion valves. One of these key processes, as mentioned, is carried out by the expansion valve, which is the topic of this article. Stay with us at Radairan Company  to...

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Accumulator Heat Exchanger آکومولاتور هیت اکسچنجر
29Oct

Accumulator Heat Exchanger in Chillers

Radiran Company, through extensive research and effort in the field of refrigeration systems, has identified the significance of accumulators equipped with heat exchangers. These accumulators play a vital role in chiller units. By directing the liquid refrigerant to the heat exchanger of the accumulator, there is a considerable increase in the efficiency of the refrigeration cycle. This process not only moves the liquid refrigerant to the subcooling area but also provides the necessary heat for its evaporation. The result of...

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آکومولاتور
22Oct

What is an accumulator

The use of certain components and equipment is often aimed at enhancing system efficiency, and there is not always an immediate necessity for their application. However, experience has shown that integrating some of these tools can be significantly effective in improving the performance and productivity of the system. Over time, these components become essential elements of the overall system. One such critical component is the accumulator. Accumulators offer many advantages and are typically used in systems that operate based on the...

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Psychrometric
06Aug

Psychrometric Chart and Air Characteristics

A psychrometric chart presents physical and thermal properties of moist air in a graphical form. It can be very helpful in troubleshooting and finding solutions to greenhouse or livestock building environmental problems. Understanding psychrometric charts can help you visualize environmental control concepts, such as why heated air can hold more moisture or, conversely, how allowing moist air to cool will result in condensation. This article explains how characteristics of moist air are used in a psychrometric chart. Three examples are...

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مدیریت رسوب‌گذاری در مبدل‌های حرارتی پره و لوله
04Aug

Managing Fouling in Fin Tube Coil Exchangers

Fin tube coil exchangers are widely utilized in various industrial applications due to their efficiency and compact design. Despite their advantages, these systems are not immune to performance issues related to fouling. Fouling is a common problem that can significantly impact the efficiency and operational lifespan of heat exchangers. What is Fouling? Fouling refers to the accumulation of unwanted materials on the surfaces of the heat exchanger, particularly on the finned tubes. This accumulation can consist of scale, dirt, algae, or other...

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refrigerant مبرد
30Jul

Refrigerant

1. Chlorofluorocarbons (CFCs): - Examples: R12 (Dichlorodifluoromethane) - Properties: CFCs are highly effective as refrigerants due to their stability, non-flammability, and low toxicity. - Environmental Impact: They were found to be damaging to the ozone layer, leading to increased ultraviolet radiation reaching the Earth's surface. This ozone depletion contributed to environmental issues such as skin cancer and climate change. As a result, their use has been phased out under the Montreal Protocol. 2. Hydrochlorofluorocarbons (HCFCs): ...

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DIFFERENT TYPE OF HEATEXCHANGE انواع مختلف مبدل حرارتی
23Jul

Different Type of Heat Exchange

In a fin tube heat exchanger, heat transfer occurs through a combination of conduction, convection, and sometimes radiation, facilitated by the presence of fins and tubes. The different types of heat exchange processes in these devices can be categorized as follows: Convection Heat Transfer Convection is the primary mode of heat transfer in a fin tube heat exchanger. It involves the transfer of heat between a fluid (either a gas or liquid) and a surface. The heat exchanger typically consists of tubes...

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HVAC Systems based on green systems سیستم های HVAC مبتنی بر سیستم های سبز
21Jul

HVAC Technologies based on green systems

HVAC (Heating, Ventilation, and Air Conditioning) technology has undergone significant advancements in recent years, particularly with a focus on green systems designed to enhance energy efficiency and reduce environmental impact. These innovations reflect a growing commitment to sustainability and a more conscientious approach to managing energy consumption in buildings. Energy-Efficient Equipment: Modern HVAC systems incorporate advanced, energy-efficient components that significantly reduce energy consumption. High-efficiency furnaces, heat pumps, and air conditioners are engineered to deliver optimal performance while using less energy compared...

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درباره کویل ها About Coils
14Jul

About Coils

The finned coil is known as one of the most important components of refrigeration and heating systems. These coils are found both in the evaporator and in the condenser. Removing it effectively makes air conditioning equipment unavailable altogether. Here we want to present you with an amazing number that shows the importance of fins in air conditioning systems. The fins are responsible for 65-70% of the heat transfer on each coil. Coil tubes are responsible for the remaining 30 to...

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Acidic climate آب و هوای اسیدی
09Jul

Acidic Climates

In acidic climates, the use of fin tube coils requires careful consideration due to potential corrosion issues. Acidic environments can accelerate the corrosion of metals, including those used in HVAC systems like aluminum and copper found in fin tube coils. To mitigate this, manufacturers often use protective coatings or select materials that are resistant to corrosion. Regular maintenance and inspection are also crucial to detect any signs of corrosion early and prevent further damage. In acidic climates, several solutions can...

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