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.
The ratio between heat removed and power (watt) used - EER and SEER.
Water may condensate when air is cooled in air conditioning systems.
Heat removed from storage rooms with cooled air.
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.
Ammonia and health symptoms - smell and threat to life.
Thermodynamic properties of saturated and superheated ammonia R-717 like specific volume, enthalpy and entropy.
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 with ammonia saturation pressure at boiling points, 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.
Freeze protecting of cooling systems - temperature rating vs. required amount of antifreeze.
Comparing ethylene glycol and propylene glycol antifreeze properties.
ASTM B280 Copper Tube for Air Conditioning and Refrigeration (ACR) - Dimensions and Working Pressures
Standard specifications for seamless copper tube used in Air Conditioning and Refrigeration Field Services.
Calculating chiller and cooling tower refrigeration loads - 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 between cooling load units like kW/ton, COP and EER.
Latent and sensible cooling loads to consider when designing HVAC systems.
Typical relations between cooling power (tons cooling), air flow and duct size
Classification of dehumidifiers.
Rectangular equivalent diameter for air flows between 100 - 50000 cfm.
Properties like freezing point, viscosity, specific gravity and specific heat of ethylene glycol based heat-transfer fluids, or brines.
Comparing antifreezes used in water based heat transfer fluids or brines.
Optimal temperature and humidity conditions for common fruits and vegetables.
Heat energy produced by animals.
Amount of heat transferred from electrical motor to ambient room vs. locations of fan and motor.
Heat contributed by lights may have major impact on air-condition systems.
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.
Performance and efficiency rating of heat pumps.
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 design conditions summer or winter.
Recommended indoor temperature and humidity for common industrial products and production processes.
Lights vs. power installations in common types of buildings and rooms.
Density, specific heat, thermal conductivity, viscosity and Prandtls no. of liquid ammonia at saturation pressure.
Human metabolic heat gain in air conditioned rooms.
The quantity of heat absorbed from a refrigerated space.
Outdoor summer and winter design temperatures and relative humidity for US states and cities.
Thermodynamic properties of saturated and superheated Dichlorodifluoromethane (CF2Cl2), like specific volume, enthalpy and entropy.
Properties of Refrigerant R22 Dichlorodifluoromethane - saturated liquid and saturated vapor - imperial and metric units.
Evaporation temperature, condensing temperature and refrigerant compressor capacity.
Thermodynamic properties of refrigerant R-134a.
Thermodynamic properties of R22, like vapor volume, enthalpy and entropy at pressures from 30 to 260 psia.
Commonly used refrigerants - the methane series, ethane series, propane series, cyclic organic compounds, zeotropic blends, azeotropic blends and organic compounds.
Common 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 chart for refrigerants R22, R410A, R12, R134A, R401A, R409A, R502, R404A, R507A, R408A and R402A.
Temperature and pressure diagram for constant boiling refrigerants - imperial and SI units.
Calculate compression work, coefficients 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.
The ratio Sensible Heat (or Cooling) Load to 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
Required size of ventilation and air conditioning rooms according DIN 1946.
Air conditioner heat loads and evaporator and condenser water flow rates.