Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort
Using steam to humidify air.
Relative humidity in moist air can estimated by measuring the dry and wet bulb temperature.
Air conditioner efficiency is the ratio between heat removed and power (watt) used - EER and SEER
Water may condensate when air is cooled in an air conditioning system
Ammonia and health symptoms - smell and threat to life
Thermodynamic properties of saturated and superheated ammonia R-717 - specific volume, enthalpy and entropy
Online calculator, figures and tables showing dynamic (absolute) and kinematic viscosity of gasous and liquid ammonia at temperatures ranging from -73 to 425°C (-100 to 800°F) at pressure ranging from 1 to 1000 bara (14.5 - 14500 psia) - SI and Imperial Units
Figures and tables showing how the properties of liquid and gaseous ammonia changes along the boiling/condensation curve (temperature and pressure between triple point and critical point conditions). An ammonia phase diagram are included.
Online calculator, figures and tables showing specific heat, CP and CV, of gasous and liquid ammonia at temperatures ranging from -73 to 425°C (-100 to 800°F) at pressure ranging from 1 to 100 bara (14.5 - 1450 psia) - SI and Imperial Units
Online calculator, figures and tables showing thermal conductivity of liquid and gaseous ammonia at temperatures ranging -70 to 425 °C (-100 to 800 °F) at atmospheric and higher pressure - Imperial and SI Units
Figures and table showing ammonia saturation pressure at boiling point, SI and Imperial units
Online calculator with figures and tables showing density and specific weight of ammonia for temperatures ranging -50 to 425 °C (-50 to 800 °F) at atmospheric and higher pressure - Imperial and SI Units.
Comparing ethylene glycol and propylene glycol properties as antifreeze
Freeze protecting cooling systems - temperature rating vs. required amount of antifreeze
ASTM B280 - Copper Tube for Air Conditioning and Refrigeration - ACR - Dimensions and Working Pressures
Standard specification for seamless copper tube for Air Conditioning and Refrigeration Field Service
Calculating chiller and cooling tower refrigeration - in tons
Chilled water system equations - evaporator and condenser flow rates
Performance and efficiency terminology related to heat pumps and air condition systems
Latent and sensible cooling and heating equations - imperial units
Convert cooling load units kW/ton, COP and EER
Latent and sensible cooling loads to consider in design of HVAC systems
Classification of dehumidifiers.
Equivalent diameter for rectangular and circular ducts - air flows between 100 - 50000 cfm
Freezing point, viscosity, specific gravity and specific heat of ethylene glycol based heat-transfer fluids, or brines
Antifreezes used in water based heat transfer fluids or brines
Optimal temperature and humidity conditions for some common fruits and vegetables
Heat energy produced by animals
Heat transferred from an electrical motor to the ambient room - different locations of fan and motor
Heat contribution from lights may have a major impact on an air condition system
Equivalent heat index vs. air temperature and relative humidity - in degrees Fahrenheit and Celsius
Heat loss from electrical equipment like switch gear, transformers and variable frequency drives
Rating the performance and efficiency of heat pumps
Heat removed when air is cooled to storage room conditions
Heat gain from persons in air conditioned spaces - in btu/hr.
Draw HVAC diagrams online with this Google Drive drawing tool.
Recommended indoor comfort temperatures vs. outdoor temperatures
Recommended indoor temperature and humidity for some common industrial products and production processes
Recommended indoor design conditions
Lights power installations in common types of buildings and rooms
Density, specific heat, thermal conductivity, viscosity and Prandtls no. of liquid ammonia at its saturation pressure
Human metabolic heat gain in air conditioned rooms.
The quantity of heat absorbed from refrigerated space
Outdoor summer and winter design temperatures and relative humidity for US states and cities.
Thermodynamic properties of saturated and superheated - Dichlorodifluoromethane - CF2Cl2 - specific volume, enthalpy and entropy
Evaporation temperature, condensing temperature and refrigerant compressor capacity
Thermodynamic properties of refrigerant R-134a
Properties of Refrigerant R22 Dichlorodifluoromethane - saturated liquid and saturated vapor - imperial and metric units
Commonly used refrigerants - methane series, ethane series, propane series, cyclic organic compounds, zeotropic blends, azeotropic blends and organic compounds
Refrigerants and their color codes
Refrigerants - Ozone Depletion (ODP) and Global Warming Potential (GWP)
Physical and environmental properties of some common refrigerants
Temperature and pressure diagram for constant boiling refrigerants - imperial and SI units
Temperature and pressure chart for refrigerants R22, R410A, R12, R134A, R401A, R409A, R502, R404A, R507A, R408A and R402A
Compression work, coefficient of performance and more
Ventilation required for refrigeration machinery and compressors in hot areas
Recommended relative humidity in production and process environments - like libraries, breweries, storages and more.
Sizes of ventilation and air conditioning rooms according DIN 1946
Sensible Heat Ratio - SHR - is defined as the sensible heat or cooling load divided by the total heat or cooling load
Relative solar heat transmission through different types of glass windows
Solar heat gain through windows with roller shades, vertical blinds and Venetian blinds
Properties of R-22 - vapor volume, enthalpy and entropy at pressures from 30 to 260 psia
Typical relations between tons cooling, air flow and duct size
Air conditioner heat loads, and evaporator and condenser water flow rates