Pool-water thermal sizing
The current method is thermal-phase1-v2. It separates water heat-up, convection, evaporation, pipework, solar, radiation and wall/floor transfer. Indoor ventilation duty is reported separately from pool-water duty. Named components use cited relations; the combined method also contains Lydmera assumptions.
Outdoor and indoor assumptions
Indoor evaporation uses the simplified ASHRAE low-air-speed relation. Outdoor evaporation uses an adapted historical wind correlation; it has not been validated against the current ASHRAE natural/forced method. Convection is forced-flow only. The outdoor sky temperature uses a fixed 12 K offset; cooling ground transfer is not calculated. Cover and material defaults need project-specific evidence.
Climate conditions
Fetched conditions come from NASA POWER historical gridded data, with recorded period, selection and source. They are archive estimates, not ASHRAE design-weather tables or a weather station at the pool. Site exposure and the required project design conditions still determine the appropriate inputs.
Circulation and equipment
Circulation calculations include pipe and device losses, clean/dirty filter head and available suction head. Automatic pump selection is bounded to fixed-speed identical parallel pumps and the supplied curve range. Filtration presets are internal screening assumptions, not complete PWTAG, DIN, PHTA or EN compliance checks. Manufacturer performance and missing evidence remain visible in equipment review.
The wider design
The workflow supports pool-plant technical proposals. Detailed pool-hall dehumidification and duct design, electrical protection/bonding, structure, water chemistry, suction-entrapment safety and surge/overflow design need their own specialist design and coordination.