The following psychrometric process calculations are available Heating Coil The "off" dry bulb temperature must be no lower than the "on" temperature. The process is assumed to be sensible only. The flowrate is calculated from the process flow and return temperatures. Cooling Coil Uncheck Use entered ADP & CCF data to use the entered "off" dry bulb temperature and secondary condition. The entered target apparatus dew point and maximum coil contact factor data will be ignored. The target apparatus dew point and maximum coil contact factor will be calculated from the input data. Check Use entered ADP & CCF data to force the process towards the apparatus dew point. The process will approach the apparatus dew point, subject to the entered "off" dry-bulb temperature and maximum coil contact factor. The flowrate is calculated from the entered flow and return temperatures. Steam Humidifier Although generally considered to be a latent-only process, a small heating effect does occur. This will be calculated by Psyclone if required and will cause the calculated "off" humidifier condition to vary from the entered data, although the required moisture content (humidity ratio) will be maintained. The process may be used to examine electrode and resistance type humidifiers. A warning will be given if the process results in reduced moisture content. Ultrasonic Humidifier The process is adiabatic in nature and a cooling effect occurs. This is calculated by Psyclone and will cause the calculated "off" humidifier condition to vary from the entered data, although the required moisture content (humidity ratio) will be maintained. The process may also be used to examine centrifugal and compressed-air nozzle humidifiers. A warning will be given if the process results in reduced moisture content. Direct Evaporative Cooler Uncheck Use entered effectiveness data to use the entered "off" dry bulb temperature and secondary condition. The maximum direct saturation effectiveness data will be ignored. The target thermodynamic wet-bulb temperature or final water temperature will be calculated from the input data, depending on whether Adiabatic operation has been checked or unchecked. Check Use entered effectiveness data to force the process towards the thermodynamic wet-bulb temperature of the entering air (adiabatic operation) or towards the temperature of the circulating water (non-adiabatic operation). Check or uncheck Adiabatic operation. The process is adiabatic in nature if no heat is input into or extracted from the circulated water. If the process is not adiabatic, enter the final water temperature. Enter the maximum direct saturation effectiveness of the process, ie the percentage that the process can approach the thermodynamic wet-bulb temperature of the entering air or the temperature of the circulating water. The process will approach the final condition, subject to the entered "off" dry-bulb temperature and maximum effectiveness. Indirect Evaporative Cooler The process is sensible in nature, with the secondary air wet bulb condition as a limiting value, unless condensation occurs in the airstream. If condensation occurs, a warning will be given. Uncheck Use entered effectiveness data to use the entered "off" dry bulb temperature and secondary air wet bulb condition. The maximum indirect cooling effectiveness data will be ignored. Check Use entered effectiveness data to force the process towards the wet-bulb temperature of the secondary air, subject to the maximum effectiveness. Enter the maximum indirect cooling effectiveness of the process, ie the percentage that the process can approach the wet-bulb temperature of the secondary air. The process will approach the final condition, subject to the entered "off" dry-bulb temperature and maximum effectiveness. Mixing Box A warning will be given if the process results in an RH greater than 100%. Click Yes to recalculate, giving a condition outside of the fogging region. Heat Recovery Unit Select the heat recovery unit type and sensible/total efficiencies. A warning will be given if the process results in condensation occurring in the airstream (for sensible heat recovery units only) Freeform 'Freeform' processes may be examined, with no restriction on "on" and "off" conditions.