Procedure of cost estimation of distilled water ...

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CRF: The capital recovery factor,. FAC: The fixed annual cost,. SFF: the sinking fund factor,. ASV: The annual salvage value, mw: average annual Productivity,.
Procedure of cost estimation of distilled water produced by desalination system Adel OUESLATI Dr. in chemical engineering processes The better economic return on the investment depends on the production cost of the distilled water and its applicability. We use the following nomenclature for estimating the cost of distilled water produced by any desalination system. CRF: The capital recovery factor, FAC: The fixed annual cost, SFF: the sinking fund factor, ASV: The annual salvage value, mw: average annual Productivity, AMC: maintenance cost, CC: Current cost (0.06$/kW h), AC: Annual cost, M: annual yield of solar still, P: is the present capital cost of desalination system, i: is the interest per year, which is assumed as 12%; n: is the number of life years, which is assumed 10 years in this analysis. Power: is power consumed by system, ACC: is the cost of power used in system. CPL: The cost of distilled water per liter, These are the main calculation parameters used in the cost analysis of the desalination unit. The above-mentioned calculation parameters can be expressed as: The interest per year: i

The capital recovery factor: CRF 𝐢𝑅𝐹 =

𝑖(𝑖+1)𝑛 (𝑖+1)𝑛 βˆ’1

(1)

The number of life years: n The present capital cost of desalination system: P

The fixed annual cost: FAC

The sinking fund factor: SFF 𝑖 𝑆𝐹𝐹 = (𝑖+1)𝑛 (3)

FAC = P* CRF

(2)

βˆ’1

Maintenance cost: AMC,

Power

AMC = 0.15*FAC

The annual salvage value: ASV,

(5)

ASV = 0.2*P

ACC: is the cost of power used in system. ACC = CC Γ— Power

(6)

Annual cost : AC AC = FAC + AMC + ACC βˆ’ ASV

Mw :

average annual Productivity

(7)

CPL: The cost of distilled water per liter, 𝐢𝑃𝐿 =

𝐴𝐢 𝑀

(8)

(4)