2025 - Page 2 of 3 - شرکت تولیدی رادایران

07MarMarch 7, 2025

Refrigeration as a quality and safety contribution to the meat industry

“In order to contribute to the availability of food for a constantly growing population, demanding with the quality of the products of the meat industry" Meat becomes an ideal culture medium for the growth of almost any micro-organism. This is due to its nutritional qualities, neutral post-mortem pH (pH = 6.5), high water activity (aw = 0.98), and extrinsic factors such as temperature and oxygen concentration. Meat and meat products are perishable by nature and easily susceptible to microbial contamination and chemical...

By پیمان داوریArticles, Technichal Points, Trainingmeat industry, quality and safety, Refrigeration

02MarMarch 2, 2025

Defrost Process – Part two

Air defrosting In refrigeration, air defrost is an effective method of combating ice build-up in evaporators. This process uses the air in the chamber itself to defrost the frost efficiently. Its suitability is intensified in chambers above 4ºC, as at lower temperatures its effectiveness is reduced. The system starts with the closing of the liquid solenoid valve, which stops the refrigerant flow to the evaporator and to be emptied by the compressor until it stops. In this case the fans recirculate the air...

By پیمان داوریArticles, Technichal Points, Trainingair defrost, electric resistance defrost, hot gas defrost, hot glycol defrost, reverse cycle defrost, فرایند دیفراست

27FebFebruary 27, 2025

Defrost Process

The defrost process in refrigeration systems is crucial for the correct operation of the equipment and allows the removal of the frost generated after dehumidification and subsequent freezing of the humidity in the air. First, we plan a defrost schedule, where we agree on the frequency of defrosting. Initially, by closing the refrigerant solenoid valve to prevent the refrigerant from entering the evaporator, the compressor sucks the remaining refrigerant until it stops due to low pressure. This process allows the system...

By پیمان داوریArticles, Technichal Points, Trainingair defrost, electric resistance defrost, hot gas defrost, hot glycol defrost, reverse cycle defrost, فرایند دیفراست

23FebFebruary 23, 2025

Cold rooms according to their size

Panels, floors and roofs, usually made of sandwich panels. The sandwich panel is composed of two steel sheets protecting an insulating core of high density polyurethane. This panel is responsible for the most efficient and durable cooling of the cold room. Airtight door. It can be sliding or pivoting, and incorporate an air curtain, or louvres to mitigate cold losses with each door opening. Humidifiers or dehumidifiers. These allow humidity (relative humidity) to be added to or removed from the cold room in such...

By پیمان داوریArticles, Technichal Points, TrainingCold rooms

21FebFebruary 21, 2025

Cold rooms Definition

Cold rooms are spaces where, thanks to a refrigeration system that establishes certain climatic conditions, the conservation or manufacturing process of different products is favored. They are a fundamental element in many sectors. From the food and HORECA sector for the correct preservation of food, to the industrial sector for production processes where refrigeration is involved. For example, in a vehicle test tunnel, where a cold room simulates certain climatic conditions, or in the manufacturing process of medicines such as insulin. Cold rooms can...

By پیمان داوریArticles, Technichal Points, TrainingCold rooms

16FebFebruary 16, 2025

Performance study of spiral finned tubes on heat transfer

The study titled "Performance study of spiral finned tubes on heat transfer and wake flow structure," published in the International Journal of Heat and Mass Transfer, investigates the turbulent flow and heat transfer characteristics of heat exchangers utilizing spiral finned tubes (SFT). The research employs large eddy simulation (LES) to analyze the flow dynamics and temperature distribution around these tubes, aiming to enhance the understanding of how vortex structures influence heat transfer efficiency. Objectives and Methodology The primary objective of the...

By پیمان داوریArticles, Technichal Points, Trainingspiral finned tubes

14FebFebruary 14, 2025

What is a Unit Heater

What is a Unit Heater? • A unit heater is a heating device used to warm specific spaces such as garages, workshops, or warehouses. • These heaters are especially useful in locations where traditional heating systems may not reach, or where their implementation is not practical. Features and Applications • Price of Unit Heaters: The price of unit heaters varies depending on the type, size, and capabilities of the device. • Structure and Function: This device is a small box that contains a heating system...

By administratorArticles, Technichal Points, TrainingUnit Heater

09FebFebruary 9, 2025

Introduction to Types of Air Conditioning Systems

Introduction to Types of Air Conditioning Systems Introduction • Importance of Air Conditioning Systems: o Widespread and essential use in buildings o Objective: To provide optimal temperature and humidity for human comfort o Emergence of various types of systems for specific environments Description of Air Conditioning Systems 1. Chiller and Fan Coil System Composition:  Comprises a chiller and multiple fan coils for ventilating different areas Method of Operation:  The chiller cools water, which is then supplied to the fan coils.  Heat is extracted from the air, and warm water...

By پیمان داوریArticles, Technichal Points, Training1. Chiller and Fan Coil, Air Conditioning Systems, Chiller and Air Handler System, Duct Split System, refrigeration cycle

04FebFebruary 4, 2025

The Impact of Internal Grooves in Copper Tubes on Heat Transfer in Fin-Tube Coils

<p> Introduction Heat transfer plays a crucial role in thermal and cooling systems. Copper tubes used in fin-tube coils are highly favored due to copper's superior heat transfer properties. However, the design and physical characteristics of these tubes, particularly their internal grooves, can significantly affect their efficiency. Internal Grooves in Tubes Internal grooves in tubes can take the form of longitudinal or circular indentations. These grooves increase the contact surface area between the fluid and the tube wall, subsequently enhancing heat transfer. By...

By پیمان داوریArticles, Technichal Points, TrainingCopper Tubes, Fin-Tube Coils, heat transfer

27JanJanuary 27, 2025

Definition of Copper Pipe

1. Definition of Copper Pipe • Definition: A copper pipe is a type of pipe made from copper, which is used in industrial and domestic applications due to its physical and chemical properties. • Features: o High resistance to corrosion o Excellent heat transfer o Long durability o Flexibility for easy installation o Hygienic properties and reduction of bacterial growth in drinking water 2. Technical Specifications of Copper Pipes • Raw Materials: High-purity copper (99.9%). • Dimensions and Standards: o Outside diameter: 4 to 100 mm o Wall thickness: 0.5 to 5...

By پیمان داوریArticles, Technichal Points, TrainingCopper Tubes

Yearly Archives - 2025