エンジニアリングと知識

基礎とエンジニアリング

チップへの直接液体冷却: 高密度データセンターの熱管理の未来

AI-driven power densities have exploded from 4 kW to 30+ kW per rack, pushing traditional air cooling past its limits. This guide breaks down single-phase and two-phase direct-to-chip cooling architectures, compares low-GWP refrigerant options like R-1233zd(E) and R-1336mzz(Z) against safety and pressure trade-offs, and covers the hose, tubing, and quick-disconnect design choices engineers need to specify reliable, sustainable thermal management for high-density GPU and CPU clusters.

ダクトワークの気流バランス

Learn the essential techniques for balancing ductwork air flow to maximize HVAC efficiency and ensure consistent indoor comfort.

主要なHVACシステムと機器

Master the essentials of selecting, sizing, and operating major HVAC systems and equipment for optimal building performance.

Copeland冷凍マニュアルのダウンロード

Access our comprehensive collection of Copeland Refrigeration Manuals to streamline your equipment installation, system maintenance, and engineering fundamentals.

氷貯蔵システム

Explore the principles and engineering behind ice storage systems to efficiently manage thermal energy and optimize HVAC performance.

膨張タンクのサイズ計算式

Learn the essential formulas and step-by-step methods required to accurately size an expansion tank for hydronic heating and cooling systems.

4-Pipe And 2-Pipe Heating And Cooling Plants

Learn the core differences between 4-pipe and 2-pipe heating and cooling plants to determine the most efficient system design for your building’s HVAC needs.

水管と火管ボイラー

Learn the key differences between water tube and fire tube boilers to choose the right system for your industrial steam and heating needs.

キャピラリーチューブ冷凍

Learn the fundamental principles and engineering behind capillary tube refrigeration systems to effectively optimize cooling performance and efficiency.

冷蔵式と計算

Master essential refrigeration formulas and calculations to solve fundamental engineering challenges efficiently.


標準とコンプライアンス

HVAC 換気設計: 空気取り入れ口の最小分離距離

Air intake minimum separation distance represents critical design criteria for ensuring adequate outdoor air quality by maintaining appropriate distances between fresh air intakes and potential contamination sources.

HVAC 負荷推定: ダイバーシティ係数

Diversity factor represents a critical design parameter in HVAC load calculations, accounting for the statistical probability that all heat-generating components in a building will not operate simultaneously

HVAC 負荷の推定: 浸透熱の利得と損失

Infiltration represents uncontrolled air exchange between outdoor and indoor environments, significantly impacting both heating and cooling loads in all building types. Accurate infiltration estimation is essential for

HVAC 負荷の推定: 機器および家電製品からの内部熱利得

Equipment and appliances represent significant internal heat sources in modern buildings, often comprising the largest component of cooling loads in commercial and industrial facilities. Accurate estimation of

HVAC負荷推定:人と居住者からの内部熱ゲイン

Internal heat gain from people represents a significant component of HVAC cooling loads, particularly in high-occupancy buildings. Accurate estimation of occupant heat gain is essential for proper

HVAC負荷推定:グレージングU値とシェーディング係数(SC)値

Fenestration thermal and solar properties are critical parameters in HVAC load calculations, significantly impacting both heating and cooling loads. Understanding glazing U-values and shading coefficients is essential

HVAC負荷推定:壁、屋根、パーティションの構造U値

Building envelope thermal properties form the backbone of HVAC load calculations, directly determining heat transfer rates and system sizing requirements. Accurate U-value determination is essential for

HVAC 乾湿プロセス: チャート、計算、および空気処理アプリケーション

Psychrometric processes form the scientific foundation of HVAC system design, enabling engineers to analyze air conditions and design effective air treatment systems. Understanding these processes is essential

HVACデザイン方程式:空気、ファン、ポンプ、および水素システムの計算

HVAC engineers rely on fundamental equations to design, size, and optimize mechanical systems. These mathematical relationships form the backbone of proper system design, ensuring accurate performance predictions

HVAC機器の寿命に関するASHRAEガイドライン

Learn how to apply ASHRAE guidelines on HVAC equipment life expectancy to optimize your building’s maintenance schedules and replacement budgeting.


デジタルツールとリソース

Ductulator and Pressure Loss (friction) calculator

Streamline your HVAC design process with our comprehensive digital Ductulator and Pressure Loss Calculator. This all-in-one tool allows you to instantly convert duct shapes, determine optimal sizing based on friction or velocity constraints, and accurately calculate total pressure loss and airflow rates for complex ductwork systems.

Air mixing calculator

Accurately determine the final thermodynamic state of combined airstreams. Input flow rates and air properties to instantly calculate mixed air conditions, streamlining AHU fresh-air and return-air mixing design.

Vapor pressure deficit (VPD) calculator

Optimize humidity control for HVAC, greenhouse cultivation, and agricultural drying. Use this Vapor Pressure Deficit (VPD) calculator to accurately determine moisture potential, enabling better transpiration rates, crop yield optimization, and precise environmental management.

Psychrometric state calculator

Instantly determine the complete psychrometric state of moist air using just two inputs. Enter dry-bulb temperature alongside any single humidity parameter to automatically calculate dew point, wet-bulb, relative humidity, enthalpy, specific volume, and density for precise HVAC design and analysis.

Plenum Box Size Calculator

Free online plenum box size calculator for HVAC engineers. Enter airflow (CFM or m³/h) and target velocity to instantly get recommended width, height, length, and depth for supply and return plenum boxes, based on ACCA Manual D sizing practice.

Expansion Tank Sizing Calculator

Size bladder, diaphragm, or plain-steel expansion tanks for closed hydronic systems in seconds. This calculator applies thermal-expansion and pressure-ratio principles from Steven T. Taylor’s ASHRAE-referenced sizing method and the ASME Boiler and Pressure Vessel Code, Section VI, to compute the minimum required tank acceptance volume for hot water, chilled water, and mixed-temperature systems. Supports US and SI units, all four major tank styles, an optional piping-expansion credit, and a built-in ASME/UMC/IMC cross-check for 170–230°F systems — with clear pass/warning/invalid status and next-step guidance for tank selection and precharge verification.

Critical Radius of Insulation Calculator

Determines the critical radius (and critical thickness) of insulation for a cylinder or sphere — the outer radius at which heat loss is maximum — and compares heat‑loss rates before and after insulation.

HVAC機器寿命計算機

プロのHVAC機器の寿命計算機を作成しました。このアプリケーションは、さまざまなHVAC機器タイプの残りの耐用年数を決定するための包括的な計算を提供します。

最新のHVACアプリケーション向けのBIMソフトウェアソリューション

As the HVAC industry continues to evolve in 2025, Building Information Modeling (BIM) has become an indispensable tool for professionals seeking to optimize design, installation,

McQuayソフトウェアのダウンロード

Explore a comprehensive guide on locating and downloading McQuay software tools to streamline your HVAC system design and selection processes.