エンジニアリングと知識

基礎とエンジニアリング

パイプ圧力降下計算:必須式とガイドライン

Explore the essentials of pipe pressure drop calculations, including key factors affecting pressure drop, commonly used equations, and practical tips for optimizing fluid transportation systems. Learn about software and tools that can assist in streamlining your calculations and enhance the efficiency of your projects. In this blog post, we discussed the importance of understanding pipe pressure drop calculations and their relevance across various industries. We introduced key factors affecting pressure drop, such as pipe diameter, length, flow rate, fluid properties, and pipe roughness. We also examined several equations for calculating pressure drop, including the Darcy-Weisbach, Hazen-Williams, and Colebrook-White equations, discussing their applicability and limitations.

データセンター向けの HVAC システムの最適化: 重要な考慮事項

Efficient and reliable HVAC systems are crucial for data center operations. This article covers the key aspects of HVAC system design for data centers, including load calculations, air distribution strategies, cooling system options, humidity control, and integration with building automation systems. By addressing these considerations, data center operators can ensure optimal performance and minimize the risk of equipment failure or downtime.

HVAC 設計のベスト プラクティス

In this blog post, we’ll discuss some of the key principles and best practices in HVAC design that every engineer should know. HVAC design is an essential aspect of creating comfortable and efficient indoor environments. As an HVAC-R engineer, understanding the principles of HVAC design is crucial for designing effective, reliable, and sustainable heating, ventilation, and air conditioning systems.

Sensible, Latent, and Total Heat

Sensible heat, latent heat, and total heat are important concepts in HVAC. Sensible heat is the heat that is transferred to or from a substance without causing a change in phase. Latent heat is the heat that is transferred to or from a substance during a phase change, such as from a liquid to a gas or from a gas to a solid. Total heat is the sum of sensible heat and latent heat.

R-Value and U-Value in HVAC

R-value and U-value are two important concepts in HVAC. R-value is a measure of a material’s resistance to heat flow, while U-value is a measure of its ability to transfer heat. The higher the R-value, the better the insulation, while the lower the U-value, the better the insulation.

HVAC における水流量の計算

Water flow rate is an important parameter in the design and operation of HVAC systems. It is important to calculate the correct water flow rate to ensure that the system operates efficiently and effectively.

空冷チラーと水冷チラー: 選択基準

Compare air-cooled vs. water-cooled chillers. Understand selection criteria to make the best choice for your cooling needs.

地区の暖房の理解:持続可能な都市アプリケーションのための効率的なエネルギー分布システム - HVAC-Rの専門家の技術的概要、設置、メンテナンス、および標準

HVACシステムにおける地区暖房の利点を発見する:効率的なエネルギー分布、コストの削減、および持続可能な都市開発のための再生可能源との統合。

冷却/加熱システムの設計手順

Design Procedures for Cooling/Heating Systems: A Comprehensive 9-Step Approach

冷却専用システムの設計手順: 8 ステップの方法論

Designing efficient cooling-only HVAC systems requires a structured approach to ensure optimal performance and appropriate equipment sizing. The following 8-step procedure provides a comprehensive framework for designing these systems, where peak cooling loads determine the airflow requirements for system components.


標準とコンプライアンス

HVACコード標準リファレンス - 一般:建物の分類と占有要件

分類と占有の要件を構築するためのHVACコード標準への本質的なガイド。適切なシステム設計とコードコンプライアンスのために、NFPA 101およびASHRAE 62.1標準を適用する方法を学びます。

地区の暖房の理解:持続可能な都市アプリケーションのための効率的なエネルギー分布システム - HVAC-Rの専門家の技術的概要、設置、メンテナンス、および標準

HVACシステムにおける地区暖房の利点を発見する:効率的なエネルギー分布、コストの削減、および持続可能な都市開発のための再生可能源との統合。

HVAC機器の寿命に関するASHRAEガイドライン

Explore ASHRAE life expectancy of HVAC equipment and learn how it guides maintenance and replacement strategies for efficient building management.


デジタルツールとリソース

Air Filters Efficiency Classification

ASHRAE 52.2: Filter testing was originated from America in 1930 (ASHVE and AFI code). It was then reviewed and modified in 1967 and 1968. ASRHAE collaborated with American National Standard Institude (ANSI) in 1992 to create ASHRAE-ANSI 52.1. Finally updated to ASHRAE 52.2 in 2007.

Psychrometric Programming Functions

ibrary of psychrometric functions to calculate thermodynamic properties of air for Python, C, C#, Fortran, JavaScript and VBA/Excel

2025 年の冷媒: 特性、用途、互換性

As the HVAC and refrigeration industry continues to evolve with environmental regulations and technological advancements, understanding refrigerant properties remains crucial for engineers, technicians, and facility managers. This comprehensive guide provides an updated overview of common refrigerants, their compositions, and applications in today’s market.

キャリアハップソフトウェア

Carrier’s Hourly Analysis Program is two powerful tools in one package – versatile features for designing HVAC systems for commercial buildings AND powerful energy analysis capabilities for comparing energy consumption and operating costs of design alternatives.

トレース 700 ソフトウェア

TRACE 700 を使用すると、建物の設計者は、エネルギー利用とライフサイクル コストに基づいて建物、システム、設備の設計を最適化できます。 TRACE 700 用の Trane ソフトウェアを使用すると、ユーザーが広範囲の変数を操作して特定の建物のプロファイルを作成できるため、事実上あらゆるチラー プラント構成のエネルギーと経済効果の分析が容易になります。

EVAP-COND 5.0 をダウンロード: HVAC エンジニア向けの究極の熱交換器シミュレーション ツール

新しい熱交換器を設計する場合でも、既存のシステムを最適化する場合でも、代替冷媒を研究する場合でも、EVAP-COND は情報に基づいた意思決定を行うために必要な詳細な分析機能を提供します。すべての HVAC エンジニアと研究者がこの強力なシミュレーション ツールを検討し、それが熱交換器設計へのアプローチをどのように変えることができるかを直接体験することをお勧めします。

Heat Transfer Textbook Download

The book is meant for juniors, seniors, and first-year graduate students. And to those who choose to learn the subject on their own, and to practicing engineers who use it as a reference. Whether one studies alone or with a class, learning means posing, then answering, one’s own questions.

Flexible Duct Calculator

Flexible Duct Calculator based on four different methods. Based on Friction Loss, Based on Duct Diameter, Equivalent Rectangular Duct, Equivalent Round Duct Diameter. Also table of Maximum Recommended Supply Velocity.

Air Change Cfm Calculator

The rate at which air is exchanged (in the premises) represents another method of measuring ventilation capacity & effectiveness. Air exchange rate is typically expressed in Air Changes per Hour – “ACH”. Air changes per hour can be estimated by determining the total air supplied to, and removed from, the premises “total air exchange” or the outdoor (fresh) air supplied to, and removed from, the premises “outdoor air exchange”. We invite you to experience how this calculator can transform your workflow. Whether you’re specifying a new system, troubleshooting an existing installation, or teaching the next generation of HVAC professionals, this tool was built with your needs in mind.