Air psychrometrics : free online Process Engineering Handbook
All what an Engineer needs to know for applications such as drying, humidifying or air handling / conditioning is grouped in Process Engineer's Tools air psychrometrics pages.
Absolute air humidity
Explore the world of air humidity with clarity. Learn the definition of absolute air humidity and its distinction from relative humidity. Dive into the calculation of absolute humidity, understanding its impact on various processes. Discover how to measure air humidity using instruments like hygrometers and psychrometers. Access a free Excel calculator on MyEngineeringTools.com for precise absolute air humidity calculations and explore additional tools for humid air-related calculations.
Relative humidity air
Understand relative air humidity with simplicity. Learn its definition as the ratio of water's partial pressure to the saturation pressure at the dry bulb temperature. Calculate relative humidity easily using the formula provided. Expressing in percentage, it reveals how close the air is to saturation and the potential for condensation. Explore the impact of temperature and pressure on relative humidity. Discover its practical use in dry bulk handling, drying processes, and meteorology.
Humid Air - Specific Heat Capacity
Explore the basics of absolute humidity and learn to calculate the specific heat capacity of humid air. Uncover the formula for humid air specific heat and understand how absolute humidity influences it. Discover the specific heat of dry air at different temperatures and its variation. Dive into essential knowledge about the isentropic coefficient for air at ambient temperatures.
Humid Air - Enthalpy of humid air
Understand the enthalpy of moist air – it's the energy needed to heat dry air, vaporize water, and heat the vapor at a given pressure. Explore the formula to calculate humid air enthalpy, breaking down the components like specific heat and absolute humidity. Check out a practical calculation example and access a free Excel calculator for quick calculations.
Humid Air - Heating up humid air
Efficiently heat humid air with precision. Whether for air handling or drying operations, understanding the energy required to raise air from T1 to T2 is crucial. This webpage guides you through the calculation process, considering factors like enthalpy, specific heat, and absolute humidity. Explore a step-by-step example and discover how to use psychrometric charts for accurate calculations.
Humid Air - Cooling and condensation of humid air
Efficiently cool humid air with precision. Whether for air handling units or dehumidification processes, understanding the energy required to lower air temperature is crucial. This webpage guides you through calculations, considering factors like enthalpy, specific heat, and absolute humidity. Explore step-by-step examples and discover how to use psychrometric charts for accurate cooling calculations.
Air cooling : Contact factor and Bypass factor of air cooling coils
Explore the efficiency of cooling coils with clarity. This webpage navigates you through concepts like contact and bypass factors, offering practical insights and calculations for cooling coil efficiency. Whether you're cooling humid air for air handling units or dehumidification processes, understand the dynamics and optimize your system.
Air viscosity
Gain a clear understanding of air viscosity. This webpage provides concise information on air viscosity at different temperatures, from 0°C to 25°C, and explores how it changes across a broad temperature range. Dive into the dynamics of air viscosity, illustrated with a helpful graph, and grasp the impact of pressure on viscosity.
Air psychrometrics – Air specific heat, thermal conductivity, thermal diffusivity
Air psychrometrics – Air dry and wet bulb temperatures
Comprehensive guide to humidity measurement using dry bulb and wet bulb temperatures, covering principles, techniques, and applications. It explores key concepts like dew point temperature, relative humidity, and psychrometry, with a focus on practical tools such as psychrometric charts and sling psychrometers. Advanced methods, including capacitive sensors and chilled mirror hygrometers, are discussed alongside calculation examples and software tools for RH estimation. Applications span HVAC, climate monitoring, industrial processes, and environmental control, emphasizing accuracy, calibration, and real-world implementation.
Air psychrometrics – Compressed air and water content
Air cooling tower design and calculations
Delve into the world of air cooling towers with insights on their operation and design principles. This webpage breaks down the fundamental concepts, explaining how cooling towers leverage ambient air to cool water through the process of evaporative cooling. Explore the two main types—crossflow and counterflow—and grasp the distinctions between natural draft and forced draft cooling towers. Learn about crucial factors in designing cooling towers, including efficiency calculations and the consideration of water losses.
Ventilation Systems - Acoustic Calculation Procedure
Comprehensive guide to noise calculation and mitigation in ventilation systems, focusing on sound power levels, sound pressure criteria, and silencer applications. The methodology integrates room acoustics, ductwork, and system components for accurate noise management. It includes a step-by-step process for determining sound power levels, comparing them against criteria, and selecting silencers. Practical examples and related considerations, such as vibration isolation and duct lagging, ensure effective noise control in HVAC systems, enhancing occupant comfort and productivity.
Steam Humidification: Principles, Tech & Calculations
Comprehensive guide to steam humidification principles, calculations, and technologies, emphasizing energy efficiency and system design. It explores various humidification methods, including steam, ultrasonic, and evaporative systems, highlighting their applications and selection criteria. Key topics include humidity parameters, psychrometric relationships, and design considerations for industrial and HVAC systems. The article also addresses energy efficiency, water conservation, and practical implementation, providing calculations for humidity ratio change and enthalpy, along with real-world examples and maintenance tips for optimal performance.
Air Conditioner Efficiency: EER, SEER Ratings
Comprehensive guide to air conditioner efficiency, focusing on key metrics like EER, SEER, SEER2, and COP. It explores the impact of ductwork design, leakage, and static pressure on system performance, emphasizing the importance of proper installation and upgrades. Practical considerations include regional compliance, cost-effectiveness, and advanced features for enhanced efficiency. The article also highlights the role of Energy Star certification, proper sizing, and long-term savings, providing a detailed analysis of energy costs and comfort benefits associated with higher efficiency ratings.
Air Conditioning - Calculating Condensate Water
Essential guide to air conditioning condensate management, covering the principles of condensation, influencing factors, and calculation methods. It provides formulas for estimating condensate production based on airflow, humidity ratios, and system efficiency, alongside detailed calculation techniques. Practical tools like psychrometric charts and online calculators are discussed, along with unit conversions and system-specific considerations. The article also addresses drain pan design, condensate pumps, treatment requirements, and maintenance tips to ensure efficient condensate handling and prevent system issues.
HVAC Cooling & Heating Efficiency Terminology
Comprehensive overview of HVAC efficiency metrics, including SEER, EER, COP, HSPF, AFUE, and IPLV, essential for evaluating cooling and heating systems. It highlights the importance of proper system sizing, climate considerations, and holistic decision-making in maximizing efficiency. The article explains how these metrics are calculated, their practical implications, and their role in energy conservation, cost savings, and regulatory compliance. Additionally, it emphasizes the need to balance efficiency ratings with factors like insulation, maintenance, and usage patterns for optimal system performance.
HVAC Duct Size & Air Flow Calculation for Cooling
Essential guide to HVAC duct sizing and air flow calculations, emphasizing their critical role in system efficiency, comfort, and longevity. It covers fundamental heat transfer principles, including sensible, latent, and total heat, alongside key formulas for duct sizing, such as area calculation and pressure drop. Practical examples illustrate sizing for a 2-ton system and airflow measurement methods. The article also highlights the consequences of improper sizing, from energy inefficiency to equipment damage, and underscores the importance of adhering to industry standards like ASHRAE and SMACNA for optimal HVAC performance.
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