Optimum techno-eco performance requisites for vacuum annulus tube collector–assisted double-slope solar desaltification unit integrated modified parabolic concentrator

This work presents a novel approach for a double-slope solar desaltification system having parallel array of evacuated annular tube collectors with compound parabolic modified concentrators (DS-SDS-EATC-MCPC) that are observed for eco-design requisites for the optimum performance with environ-economic viabilities. The proposed scheme has been configured to obtain the utmost probable basin’s medium hotness as 99.6 °C of having greater depth of water (0.16 m) for the East–West-faced direction of basin peak cover (30°) along with South-oriented evacuated annular tube (30°). The highest circulation pace (thermo syphon) is obtained ~ 55 kg/h. The generalized efficiencies (energy-exergy) of the system are 46.53% and 3.62%, correspondingly. The everyday distillate (16.94 kg) and its production cost (energy $0.007/kWh; exergy $0.013/kWh) at a titular selling cost ($0.07/l) maintains its goodness. The CO2 mitigates (energy-exergy) and green earned credits are 139.74 and 77.30 tons, and $1396 and $772.24, in that order. The framework outlay of the scheme is quite stumpy at $200.79, and productivity of the model is set up > 100% that shows the scheme as appreciably realistic. The evident distillate at little operating cost, ecological returns, elevated alleviation, and short payoff period makes the arrangement sustainable, viable for reasonable collector areas, and optimum EATC with MCPC as eco-design requisites for the projected scheme.