پیمان داوری, نویسنده در Radiran Manufacturing Company Official Website

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

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

برج خنک‌کن هیبریدی — بررسی فناوری، مزایا و کاربردها

28MayMay 28, 2025

Hybrid Cooling Towers — Technology Review, Advantages, and Applications

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Abstract

Hybrid cooling towers, as an advanced generation of cooling systems, integrate both dry and wet cooling methods. This technology reduces water consumption and increases energy efficiency while addressing the environmental challenges associated with traditional cooling systems. This article provides a comprehensive review of the technical principles, structure, performance, advantages, disadvantages, and application areas of hybrid cooling towers.

Introduction

Across various industries, cooling systems play a crucial role in maintaining optimal equipment performance and process stability. Cooling towers are...

By پیمان داوریArticles, Technichal Points, TrainingHybrid Cooling Towers

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

04MayMay 4, 2025

HVAC

HVAC stands for heating, ventilation, and air conditioning. The system is generally used in buildings or homes to control the indoor climate by regulating the temperature, humidity, and air quality. The aim of HVAC systems is to provide a comfortable and healthy living space for the occupants. An efficient HVAC system will not only provide comfortable conditions but can also reduce utility bills and improve indoor air quality. The heating component of an HVAC system involves various types of heating...

By پیمان داوریArticles, Technichal Points, TrainingHVAC

Author - پیمان داوری

Abstract

Introduction

1. Definition of Logarithmic Mean Temperature Difference (LMTD)