基础与工程
Design Procedures for Heating-Only Systems: An 8-Step Methodology
Designing effective heating-only HVAC systems requires a methodical approach that ensures adequate capacity while avoiding oversizing. The following 8-step procedure provides a comprehensive framework for designing these systems, focusing on peak heating loads to determine appropriate equipment sizing.
Space and Zone Airflow Sizing Calculations in HVAC Systems
Following our previous discussion on the systematic 9-step procedure for designing cooling and heating systems, it’s essential to understand the technical aspects of airflow sizing
Design Procedures for Cooling-Only Systems: Detailed Airflow Calculation Methodology
this technical supplement provides detailed insights into the critical airflow calculation methods essential for Step 3: Calculate Required Zone and Space Supply Airflow Rates. Understanding these calculation approaches enables engineers to select the most appropriate sizing method for specific project requirements.
Design Procedures for Heating-Only Systems: Airflow Calculation Methods and Technical Considerations
Proper airflow calculations are essential for system performance, ensuring thermal comfort while optimizing energy efficiency. Understanding the mathematical foundation behind these calculations enables engineers to make informed decisions when selecting the most appropriate sizing method for specific project requirements.
制冷膨胀阀尺寸和选择过程
The proper selection and sizing of refrigeration expansion valves is a systematic process requiring careful consideration of multiple parameters. Selecting the right expansion valve involves understanding system requirements, calculating correct capacities, and accounting for operating conditions such as subcooling and pressure drop.
Refrigeration Evaporator Sizing and Selection
Evaporator sizing and selection represent critical elements in refrigeration system design. The process requires a methodical approach that considers not only the cooling load but also system integration, refrigerant properties, application requirements, and energy efficiency goals.
Lighting Rules Of Thumb (HVAC)
Using lighting rules of thumb for final design of HVAC and lighting.
Infiltration Rules Of Thumb
The infiltration rate is the volumetric flow rate of outside air into a building, typically in cubic feet per minute (CFM) or liters per second (LPS). The air exchange rate, (I), is the number of interior volume air changes that occur per hour, and has units of 1/h.
The Geometry Behind Solar Energy Calculations
Solar Geometric Angles are all critical to the calculation of solar energy on any given surface at some orientation. To calculate the energy balance across any time scale with respect to the incident solar radiation, you must know the geometric relationships that define the spherical realities of planetary motion relative to the sun for specific tilted surfaces on the planet.
标准与合规性
HVAC 管道设计：管道配件摩擦损失
使用开利标准的 HVAC 管道配件摩擦损失完整指南，涵盖损失系数、压降计算和高效空气分配设计的系统优化。
HVAC 管道设计：阻尼器、衰减器和线圈摩擦损失
使用 SMACNA 标准的 HVAC 阻尼器、衰减器和线圈摩擦损失完整指南，涵盖压降计算、组件选择和系统优化，以实现高效的空气分配设计。
HVAC 管道设计：圆形管道与矩形管道等效
使用 ASHRAE 标准的 HVAC 圆形管道与矩形管道等效的完整指南，涵盖转换公式、性能注意事项以及空间受限安装的系统优化。
HVAC 管道设计：管道摩擦损失
使用 ASHRAE 标准计算 HVAC 管道摩擦损失的完整指南，涵盖摩擦图表、压降分析和高效空气分配设计的系统优化。
HVAC 管道设计：管道压力分类
使用 SMACNA 标准进行 HVAC 管道压力分类的完整指南，涵盖安全高效管道系统的压力等级选择、施工要求和测试协议。
HVAC 管道设计：商业厨房管道尺寸
使用 ASHRAE 和 NFPA 标准确定商业厨房管道尺寸的完整指南，涵盖排气罩设计、油脂管理、消防安全和食品服务运营的新风系统。
HVAC Duct Design: Duct Sizing by Velocity & Noise Criteria (NC)
使用符合 ASHRAE 和 CIBSE 标准的速度和噪声标准确定 HVAC 管道尺寸的完整指南，涵盖敏感应用的声学设计、速度限制和噪声控制。
HVAC 管道设计：通过等摩擦法确定管道尺寸
使用符合 SMACNA 和 ASHRAE 标准的等摩擦法确定 HVAC 管道尺寸的完整指南，涵盖计算程序、摩擦率选择和有效空气分配设计的系统优化。
HVAC 管道设计：管道尺寸 SMACNA 建议
使用 SMACNA 建议确定 HVAC 管道尺寸的完整指南，涵盖等摩擦、速度和静态回弹方法，以及有效空气分配的设计计算和系统优化。
数字工具和资源
Trane空调诊所书籍
These clinics are comprehensive and detailed courses used to educate on the fundamentals heating, ventilating, and air conditioning (HVAC). Each clinic includes a student workbook, with corresponding quiz questions/problems.
Carrier Technical Development Programs (Tdp) Books
Technical Development Programs (TDP) are modules of technical training on HVAC theory, system design, equipment selection and application topics. They are targeted at engineers and designers who wish to develop their knowledge in this field to effectively design, specify, sell or apply HVAC equipment in commercial applications.
Rhvac – 住宅暖通空调负荷和管道尺寸
Rhvac can calculate peak heating and cooling loads (both block and room by room) for residential buildings and some light commercial applications in accordance with ACCA Manual J, D, and S. Rhvac include a complete ACCA Manual D duct sizing capability and a complete Manual S equipment selection.
制冷剂容器颜色
本指南旨在为行业提供指导，包括制造商、工程师、安装商、承包商和用户。
Refrig – Refrigeration Box Loads
Refrig quickly calculates the maximum refrigeration load in btu’s per 24 hour period for all types of refrigeration applications. Refrig has provision for all kinds of loads including: roofs, walls, partitions, floors, products, containers, infiltration, lights, equipment, people, defrost, compressor run-time, and more.
3E Plus Software
NAIMA’s FREE 3E Plus® software program makes it easy to calculate the appropriate insulation thickness necessary for any application. To ensure accuracy, the program has customizable inputs for every aspect of your job—and offers default values if your exact numbers aren’t available.
制冷剂 PH 图
The pressure-enthalpy diagram (log P/h diagram) is a very useful tool for refrigerant technicians, engineers and researchers. Since it’s not always possible to have all of these diagrams together, we decided to give you this complete pack.
HVACR 设备预期寿命
Below you can see ASHRAE chart of HVAC Equipment Life Expectancy. The chart includes a list of median life expectancy for the following types of equipment: