Abstract
An experimental investigation was executed on the solar evacuated tube collector containing a collective condenser unit of heat pipe arrangement attached to a single slope solar desalination system. The brackish water preheating was done by the unique solar collector before entering the still. Performance analysis of the system was carried out with 0.001, 0.002 and 0.003 kg/s brackish water flow rate in the collector and 0.01, 0.02 and 0.03 m of brine water depth in a single-slope solar desalination system. The feasibility of the proposed system was evaluated by thermodynamic analysis, embodied energy, CO2 mitigation and economic analysis. Active desalination system with collective condenser heat pipe evacuated tube collector at 0.001 kg/s brackish water flow rate and 0.01 m water depth produced maximum freshwater yield, average daily thermal and exergy efficiency of 3.085 l/m2day, 30.25% and 3.17% respectively. An increase of maximum freshwater yield of 37.11% and average daily thermal efficiency of 43.5% respectively were achieved at a brackish water flow rate of 0.001 kg/s and 0.01 m of basin water depth in comparison with a traditional single slope solar desalination system. The embodied energy of the system was estimated as 630.77 kWh, and 0.001 kg/s and 0.01 m of water depth resulted in the highest earned carbon credit of 16,954.48 INR. The minimum payback period of 2.19 years was achieved at the lower brackish water flow rate and basin water depth of 0.001 kg/s and 0.01 m respectively.
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Abbreviations
- A :
-
Area (m2)
- AAC:
-
Aggregate annual cost (INR)
- ACC:
-
Annual capital cost (INR)
- ASV:
-
Annual salvage value (INR)
- C p :
-
Specific heat capacity (J/kg K)
- CC:
-
Capital cost (INR)
- CF:
-
Cash flow (INR)
- CSF:
-
Capital salvage factor
- D :
-
Diameter (m)
- d :
-
Thickness (m)
- E :
-
Energy (kWh)
- ECC:
-
Earned Carbon credit
- EPF:
-
Energy production factor
- EPT:
-
Energy payback time (years)
- ET:
-
Evacuated Tube
- EX:
-
Exergy
- F :
-
Radiation shape factor
- g :
-
Acceleration due to gravity (9.81 m/s2)
- G :
-
Glass
- h :
-
Convective heat transfer coefficient (W/m2K)
- HP:
-
Heat pipe
- I :
-
Solar radiation intensity (W/m2)
- IWT:
-
Inlet water temp. (°C)
- k :
-
Thermal conductivity (W/m2 K)
- LCCE:
-
Life cycle conversion efficiency
- L :
-
Latent heat (J/kg)
- l :
-
Length (m)
- m°:
-
Hourly productivity (l/h)
- M :
-
Total mass (kg)
- m :
-
Mass (kg)
- n :
-
Life of system (Years)
- N :
-
Total number
- Np:
-
Payback period
- OWT:
-
Outlet water temp.
- P :
-
Productivity (l)
- Q :
-
Rate of heat transfer (W)
- RC:
-
Running cost (INR)
- R :
-
Thermal resistance (K/W)
- SFF:
-
Sinking fund factor
- SP:
-
Selling price (INR)
- SV:
-
Salvage value
- T :
-
Temperature (°C)
- t :
-
Total
- U :
-
Uncertainty
- a :
-
Air
- ab :
-
Absorber
- amb :
-
Ambient
- b :
-
Basin
- C :
-
Collector
- c :
-
Condenser
- cond:
-
Conduction
- conv:
-
Convection
- e :
-
Evaporator
- en:
-
Entered
- evap:
-
Evaporation
- i :
-
Inner
- in:
-
Input
- lq:
-
Liquid
- O :
-
Outer glass covers
- out:
-
Output
- r :
-
Rate of interest
- rad:
-
Radiation
- ss :
-
Solar still
- s :
-
Sky
- v :
-
Vapour
- w :
-
Water
- ws :
-
Wind speed (m/s)
- y :
-
Yearly
- τ :
-
Transmittance
- α :
-
Absorptivity
- µ :
-
Dynamic viscosity (Pa s)
- ƞ :
-
Efficiency
- ρ :
-
Density (kg/m3)
- θ :
-
Angle
- σ :
-
Stefan Boltzmann constant (5.67 × 10–8 W/m2.K4)
- Є :
-
Emissivity
- π :
-
Pi (3.14)
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Both authors contributed to the concept, design and development of the present work. In addition, this work was carried out as a part of the Ph.D. dissertation of Garima Nema who was supervised by Karunamurthy Krishnasamy. Garima Nema performed the experimental and numerical analyses, collected and interpreted the data and drafted the majority of the manuscript. Krishnasamy Karunamurthy supervised and revised all the data interpretations, analyses and a manuscript.
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Nema, G., Krishnasamy, K. An active solar desalination system integrated with collective condenser heat pipe solar evacuated tube collector: a thermoeconomic analysis. Environ Sci Pollut Res 31, 10273–10295 (2024). https://doi.org/10.1007/s11356-022-25058-2
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DOI: https://doi.org/10.1007/s11356-022-25058-2