Design Blueprint: A Liquid-Air Cryogenic Store at a Port Facility: Liquefaction Work, Cryogen Volume, Cold Recovery and Round-Trip Budget for Two Thousand Usable Kilowatt-Hours

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24173955): This paper sizes a liquid-air storage system for a port facility requiring cold as well as power during peak-price hours. The duty calls for 2e+03 usable electrical kilowatt-hours delivered at a rated power of 400 kilowatts. Working from a stated specific energy of 25 watt-hours per kilogram, an energy density of 60 watt-hours per litre, a usable depth-of-discharge fraction of 0.95, and a round-trip efficiency of 55 percent, the calculation gives a gross stored energy of 2.11e+03 kilowatt-hours, an active-store mass of 8.42e+04 kilograms, a complete system mass of 1.26e+05 kilograms, and a complete system volume of 5.26e+04 litres (52.6 cubic metres). Full discharge at rated power lasts 5 hours, and a full recharge takes 8.11 hours at the stated charge power. Losses amount to 1.28e+03 kilowatt-hours per complete cycle, appearing as heat at average rates of 78.8 kilowatts during charging and 128 kilowatts during discharge. Standing loss is 0.2 percent of the stored energy per day. Life is limited by the calendar limit, giving 6.25e+03 effective full cycles, about 25 years at the assumed cycling rate, and a lifetime delivered throughput of 1.25e+04 megawatt-hours. All values are computed from the stated assumptions; the system is a design study and has not been built or measured. Status: SIMULATED, NOT MEASURED. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.