Allday HVAC Calc vs Data Center Engineer Toolkit

The application can be useful for HVAC engineers and contains 3 modules. Psychrometric Calculator - this module determines air properties based on input values such as dry-bulb temperature, wet-bulb temperature, and relative humidity. It provides results like humidity ratio, specific volume, enthalpy, and vapor pressure in both SI and IP units. Pipe Calculator - this module is used to calculate velocity and pressure loss in pipelines and to select pipeline diameters for a given maximum velocity and pressure loss. The module supports interdependent calculations of flow rate, heat load, and fluid temperatures: when any three of these parameters are specified, the fourth is calculated automatically. It can also be used as a reference for heat transfer fluid properties and pipe characteristics. Duct Calculator - the module is used to calculate the speed and pressure loss in round, rectangular and oval air ducts when moving wet or dry air through them, as well as to select their sections for a given maximum speed and maximum pressure loss. Additionally, the heating or cooling power is calculated for a given air flow rate, or reverse calculations: air flow rate for a given power; temperature of incoming or outgoing air for a given power and flow rate. It can also be used as a reference material for determining the properties of wet and dry air at different pressures and temperatures. Also in the description sections are the reference formulas by which the calculations are made. Web version: calc.ashrae-meteo.info

Running a data center and need quick PUE analysis, cooling tonnage, or floor load checks on site? Tired of spreadsheets for PDU load balancing and cable sizing? This app puts 11 professional data center calculators in your pocket — all offline, no subscription. FREE CALCULATORS: - PUE / DCiE Calculator: Power Usage Effectiveness and Data Center Infrastructure Efficiency with annual energy cost estimates - UPS Runtime: Battery backup runtime with inverter efficiency and power factor - Raised Floor Load & Tile Airflow: Floor tile bearing capacity check plus perforated tile CFM calculation for rack cooling adequacy PRO CALCULATORS (one-time $19.99 unlock): - Rack Heat & Cooling: Cooling tons, airflow CFM, and water flow GPM based on rack power and PUE - Rack Power Density: Amps per rack, power density in kW/m2, cable sizing, and breaker requirements - PDU Load Balance: Three-phase load balancing with imbalance percentage and per-phase capacity - CDU Flow Rate: Liquid cooling flow rate, pressure drop, and pump horsepower for water and glycol - DC Bus Voltage Drop: Cable sizing with voltage drop for copper and aluminum conductors - Breaker Derate Quick-Check: NEC temperature and conductor fill derating with selective coordination ratio check - Fiber Count Planner: Fiber optic cable count with patch panel and splice tray sizing - Fiber Pull Tension: Pulling tension, bend radius, and conduit fill ratio with pass/fail check REFERENCE TABLES (Pro): 42U rack specs, PUE benchmarks, cooling system comparison, wire ampacity, Uptime Institute Tier standards, and fiber optic specifications. Built for facility engineers, infrastructure designers, colocation operators, and data center technicians. All calculations offline. No account or login required.