One hourly model, 8,760 steps a year, feeds every page. There is no second calculation behind the reports.
The design peak and a building-type profile give a cooling load for every hour of the year. Measured profiles can replace the built-in ones.
Each hour uses the site's wet-bulb and dry-bulb temperature. Lower wet bulb means colder condenser water and less chiller power.
Chillers stage on and off to meet the hour's load. Storage charges off-peak and discharges across the peak; anything not met is reported as unserved.
Chiller power follows part load and condenser temperature, normalised to the design kW/TR you enter. Pumps run on variable speed and follow flow and head; tower fans follow heat rejection.
The traced pipe network gives the pump head: friction on the governing path, plus plant losses, plus the ETS pressure drop. Mains carry the diversified peak; ETS branches carry their full peak.
Capital cost is one trade-by-trade build-up from the cost database. Running cost is the hourly electricity and water, priced at the case tariff.
Cash flows over the study period give NPV, IRR and the tariff that reaches the target return.
Energy, flow and water balances are re-checked each hour and the residuals are shown. Annual energy rows always add up to the headline electricity and kW/TR.
A planning- and concept-level tool. Detailed design needs manufacturer data and a detailed study.