本論文的目的是針對在甘比亞的獨立型住宅太陽光電系統的規模及成本作探討。在鄉村的一個典型四口之家被設定為一個模擬模型，它的負載代表普通家庭一天中所有不同的消耗電力。本文利用從NASA地表氣象和太陽能資料庫（SSE）與甘比亞的太陽能和風能資源評估（SWERA）提供月平均的每日總太陽輻射值和日照小時的數據。
雲頓(Yundum)地區（13.4°N的，-16.8°E）的月平均每日水平面太陽輻射數據被用來在RETScreen軟體內評估太陽光電發電量和成本估算分析。雲頓總平均太陽輻射值為5.74 kWh/day/m2，日照小時有7-10小時/天。估算的交流電需求為520 WP用來設計獨立太陽光電（SAPV）系統。這個預估的SAPV系統將需要4個太陽光電模組，涵蓋約4.3平方米的面積。決定負載使用，電池大小和模規模的方法是參考專業機構的建議。
對SAPV系統的可行性評估是採用RETScreen模型，透過能源生產分析和財務可行性分析的模擬。結果顯示，此系統每年的發電量費有350千瓦時（度），容量因子達20.8%。各種財務指標（如內部收益率計算，簡單投資回收期，淨現值，權益回收期和成本效益比）顯示在甘比亞實行SAPV系統來提供住宅供電系統在財務上極為可行。本文建議採用收費服務和經銷商/零售商的融資模式在甘比亞廣泛推行SAPV系統。雖然此收費服務計劃是最困難和最費時的模式，且在甘比亞尚無這類機制。然而，如果政策能明確地敘述並呈現給利益相關者，它是有可能被實施。

The purpose of this thesis is to present a study on sizing and cost estimation methodology for stand-alone residential PV power system in The Gambia. A typical peri-urban household of four people was chosen as a model for simulation where the loads that were chosen are an average household to power all the different loads in the house on a typical day. This thesis utilizes monthly average daily global solar radiation and sunshine-hour data from NASA Surface Meteorology and Solar Energy (SSE) through the Solar and Wind Energy Resource Assessment Programme (SWERA) in The Gambia.
The monthly average daily solar radiation data incident on horizontal surface at Yundum (13.4°N, -16.8°E) was used to evaluate the PV energy production and cost estimation analysis with the software RETScreen. Yundum has an average global solar radiation value of 5.74 kWh/day/m2, and a daily sunshine-hour of 7-10 hours/day. The AC peak load energy demand is calculated as 520 Wp, which is used to designed Stand-Alone PV (SAPV) system. It is estimated that the potential SAPV system would require 4 PV modules, covering an approximate area of 4.3 m2. The approach used for load determination, battery sizing and array sizing is based on guideline issued by professional organization.
Feasibility assessment of the proposed SAPV system is evaluated using RETScreen model, through the simulation of an energy production analysis and financial viability analysis. The results showed this system has annual electricity of 1700 kWh, with a capacity factor of 20.8%. Various financial indicators (such as internal rate of return, simple payback period, net present value, equity pay-back period and benefit-cost ratio) indicated favorable financial viability for the deployment of such SAPV system for residential power system in The Gambia. The fee-for service and dealer/retailer financing models are recommended for the implementation of a wide spread SAPV system dissemination mechanisms in The Gambia. Although the fee-for service scheme is the most difficult, time-consuming model, and it is not exist today in Gambia. However, it can be possibly be implemented if policies are clearly stated and presented to the stakeholders.

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