2024 - Radiran Manufacturing Company Official Website

13AugAugust 13, 2024

A detailed explanation of the psychrometric chart and the properties of air – Part II

The chart shows other important moist air properties as diagrammed in Figure 2: wet-bulb temperature; enthalpy; dewpoint or saturation temperature; relative humidity; and specific volume. See the Definitions section for an explanation of these terms. Moist air can be described by finding the intersection of any two of these properties. This is called a "state point." From the state point all the other properties can be read. The key is to determine which interest. Some practice with examples will help....

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06AugAugust 6, 2024

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

04AugAugust 4, 2024

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...

By پیمان داوریArticles, Technichal Points, TrainingFin Tube Coil Exchangers, Managing FoulingComments Off

30JulJuly 30, 2024

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): ...

By پیمان داوریArticles, Technichal Points, TrainingChlorofluorocarbons, Hydrochlorofluorocarbons, Hydrofluorocarbons, Hydrofluoroolefins, Natural Refrigerants, RefrigerantComments Off

23JulJuly 23, 2024

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

21JulJuly 21, 2024

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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14JulJuly 14, 2024

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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09JulJuly 9, 2024

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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02JulJuly 2, 2024

Latent heat

Latent heat is the energy absorbed or released by a substance during a phase change without a change in its temperature. This concept is important in HVAC (Heating, Ventilation, and Air Conditioning) systems, which regulate indoor climates by controlling temperature, humidity, and air quality. When a substance changes from a solid to a liquid or a liquid to a gas, it undergoes a phase change. During this transition, latent heat is either absorbed or released. For example, during evaporation, water absorbs...

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30JunJune 30, 2024

Pressure test in heat exchangers

Pressure Testing of Fin Tube and Shell and Tube Coils: Standards and Procedures Pressure testing is a very important quality control step in the manufacturing and maintenance of condensers and evaporators, whether they use fin tube coils or shell and tube coils. These components play a crucial role in heat exchange processes in HVAC systems and industrial applications, ensuring efficient thermal transfer. Proper pressure testing according to standards is essential to verify their integrity and safety. Fin Tube Coils in Condensers...

By پیمان داوریArticles, Technichal Points, TrainingFin Tube Coils, Hydrostatic Test, Leak Testing, Pneumatic Test, Pressure test in heat exchangers, Shell and Tube CoilsComments Off

Yearly Archives - 2024