بایگانی‌ها Technichal Points

03AugAugust 3, 2025

Optimization of Aluminum Fin Geometry for Enhancing Cooling Efficiency in Copper Tube Coils

Finned coils composed of aluminum fins and copper tubes are among the most effective and widely used heat transfer systems in HVAC, refrigeration, and industrial heating and cooling applications. In these coils, the high thermal conductivity of copper tubes carrying the cooling or heating fluid combines with the adequate thermal conduction properties of aluminum fins to provide an optimal balance of heat transfer efficiency and corrosion resistance. A critical factor in improving the overall performance of these coils is the...

By پیمان داوریArticles, Technichal Points, TrainingAluminum fins, Copper Tube

27JulJuly 27, 2025

The Impact of Environmental Pollution on the Performance of Water Coils

Introduction Water coils are essential components in heating, cooling, and air conditioning (HVAC) systems. Their main function is to transfer heat between the fluid circulating inside the coil (usually hot or chilled water) and the air passing over the coil’s surface. However, the efficiency of water coils is heavily influenced by several external factors—one of the most critical being environmental pollution. In this article, we explore how various types of environmental pollutants affect the performance, efficiency, and lifespan of

By پیمان داوریArticles, Technichal Points, TrainingEnvironmental Pollution, Water Coils

بهینه‌سازی سیکل تبرید با بهبود عملکرد کندانسور در طراحی و ساخت کندانسور

15JulJuly 15, 2025

Optimization of Refrigeration Cycle by Enhancing Condenser Performance in the Design and Construction of Coil Fin and Tube Condensers

Introduction The condenser is a critical component in the refrigeration cycle, playing a vital role in heat exchange between the refrigerant fluid and the ambient environment. Optimizing condenser performance directly leads to increased system efficiency, reduced energy consumption, and extended equipment life. Particularly for coil fin and tube condensers—widely used in various industries due to their extensive surface area and effective heat transfer characteristics—improving design and operation is paramount. This article examines the key factors and methods affecting condenser performance and...

By پیمان داوریArticles, Technichal Points, TrainingCondenser Function, Condonsor, refrigeration cycle

10JulJuly 10, 2025

Technical Study on the Use of Copper and Aluminum as Materials in Coil Fins and Tubes and Their Advantages Compared to Other Metals

Introduction Coil fins and tubes are essential components in heat exchange systems used in HVAC equipment, chillers, unit heaters, and other thermal systems. The choice of material for manufacturing tubes and fins directly impacts heat transfer efficiency, overall system weight, corrosion resistance, and total cost. This article explores the technical reasons behind the use of copper for tubes and aluminum for fins, along with their advantages and comparisons to other metals. 1. Thermal and Mechanical Properties of Copper • High Thermal Conductivity: Copper...

By پیمان داوریArticles, Technichal Points, TrainingAluminum, Copper, Fin-Tube Coils

Air Washer in Industrial Warehouse ایر واشر صنعتی

07JulJuly 7, 2025

Air Washer in Industrial Warehouse HVAC: An Effective Cooling Solution

In industrial environments such as warehouses, HVAC (heating, ventilation, and air conditioning) plays a crucial role in maintaining a comfortable and safe working atmosphere. Due to the large space and high volume of air circulation, conventional cooling systems can be inefficient and costly. In this context, the air washer emerges as a specialized and cost-effective solution for cooling and air cleaning in industrial warehouses. This article reviews the structure, operation, and benefits of air washers in cooling warehouse air. Structure and...

By پیمان داوریArticles, Technichal Points, TrainingAir Washer, Industrial Air Washer

30JunJune 30, 2025

Service Valves in Refrigeration Systems

systems and explains the role of each in the proper functioning of the system: Hand Valve: Hand valves are used for manual control of refrigerant flow in the piping lines. They allow manual opening or closing of the flow and are used during system maintenance and repair. Suction Service Valve: These valves are located on the suction line of the compressor and are used to facilitate servicing and repairs. Discharge Service Valve: Discharge service valves are placed on the compressor discharge line and, similar to suction...

By administratorArticles, Technichal Points, TrainingRefrigeration Systems, Service Valves

11JunJune 11, 2025

Zent

The Zent air conditioning unit is an innovative HVAC system designed to provide comfortable indoor air conditions under varying climatic scenarios. Utilizing evaporative cooling through a cellulose pad in the summer and a finned-tube hot water coil for winter heating, this device efficiently meets both cooling and heating demands with low energy consumption. Structure and Function of the Cellulose Pad in Summer Cooling One of the key components of the Zent unit is the cellulose pad, which serves as the core of...

By پیمان داوریArticles, Technichal Points, TrainingZent, Zent Machine

پروسه اسیدشویی کندانسور پوسته‌لوله با تیوب‌های مسی و پوسته کربن استیل در چیلرهای آب‌خنک تراکمی

01JunJune 1, 2025

Acid Cleaning Process for Shell-and-Tube Condensers with Copper Tubes and Carbon Steel Shells in Water-Cooled Reciprocating Chillers

Introduction Shell-and-tube condensers play a critical role in heat exchange and refrigerant condensation in water-cooled reciprocating chillers. Typically, their tubes are made of copper and the shell is made of carbon steel. Over time, deposits, corrosion products, and sludge accumulate inside the tubes, reducing heat transfer efficiency. Acid cleaning is an effective method to remove these fouling materials and restore performance. This article outlines a complete and technical step-by-step procedure for acid cleaning such condensers. Materials and Equipment Required Suitable acid (commonly diluted...

By پیمان داوریArticles, Technichal Points, TrainingAcid Cleaning Process, Carbon Steel Shells, Copper Tubes, Shell-and-Tube Condenser, Water-Cooled Reciprocating Chillers

21MayMay 21, 2025

The Role of Drift Eliminators in Cooling Towers

Reducing the Amount of Water Droplets Carried with the Exhaust Air (Drift Reduction) The primary function of drift eliminators is to prevent small water droplets from escaping the cooling tower along with the airflow. Water droplets suspended in the air stream (drift) can cause environmental problems (pollution of surrounding soil and water) and water loss in the system. Drift eliminators collect and separate these droplets, minimizing water loss. Environmental Protection and Water Conservation By reducing the amount of suspended...

By administratorArticles, Technichal Points, TrainingCooling Tower, Drift Eliminator

18MayMay 18, 2025

Logarithmic Mean Temperature Difference

1. Definition of Logarithmic Mean Temperature Difference (LMTD)

The logarithmic mean temperature difference is not an arithmetic average but a logarithmic one, used to calculate the temperature difference between two fluid streams in a heat exchanger where temperatures gradually change. The general formula is: ΔT1= temperature difference at the beginning of the path (e.g., hot fluid temperature minus cold fluid temperature at the inlet) ΔT2 = temperature difference at the end of the path (e.g., hot fluid temperature minus cold fluid temperature at the outlet) ln...

By پیمان داوریArticles, Technichal Points, TrainingLMTD, Logarithmic Mean Temperature Difference