In　this　study,　two　schemes　of　solar　electrical　power　generation　are　designed　and　compared　according　to　solar　collection　area　minimization.　The　one　comprises　the　parabolic　trough　collector,　dual-tank　of　molten　salt　heat　storage,　and　Organic　Rankine　cycle.　The　other　consists　of　photovoltaic　cell,　polymer　electrolyte　membrane　water　electrolyzer,　and　polymer　electrolyte　membrane　fuel　cell.　The　effects　of　irradiation　value,　environmental　temperature,　and　energy　storage　type　on　thermodynamic　performance　were　investigated.　The　results　indicated　that　the　solar　irradiation　value　had　a　more　obvious　effect　on　the　PV　(photovoltaic)　cell　performance　than　environmental　temperature,　and　the　PTC　(parabolic　trough　concentrator)　performance　was　improved　with　the　increases　of　solar　irradiation　value　and　environmental　temperature.　The　environmental　temperature　effect　was　negligible;　however,　the　influence　of　irradiation　value　was　obvious.　Irradiation　value　had　a　positive　effect　on　the　former　system,　whereas　it　demonstrated　the　opposite　for　the　latter.　The　latter　system　had　much　lower　efficiency　than　the　former,　due　to　the　low　conversion　efficiency　between　hydrogen　energy　and　electrical　energy　in　the　polymer　electrolyte　membrane　water　electrolyzer　and　fuel　cell.　Stated　thus,　the　latter　system　is　appropriate　for　the　power　generation　system　with　non-energy　storage,　and　the　former　system　is　promising　in　the　power　generation　system　with　energy　storage.