200825280 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種發電系統，特別是利用熱泵驅動熱 機以產生電能的發電系統，其中熱機可以爲史特靈引擎或 蒸氣渦輪機。 【先前技術】 史特靈循環介紹： 史特靈循環爲等溫熱傳與等容膨脹壓縮之過程，與理 想的史特靈循環具有與卡諾循環相同的熱效率，第1圖爲 史特靈循環的溫度與熵關係圖，T爲溫度，S爲熵，1〜4 爲4個工作狀態點，以下逐一說明： 1 一2等溫壓縮過程（熱量從工作流體傳遞到冷源）： 置換活塞將工作流體推進冷源後保持在頂端死點位置，工 作流體被冷卻至並保持在冷源溫度TL ;飛輪驅動作功活塞 壓縮工作流體，當作功活塞從它的底端死點運動到頂端死 點時壓縮過程結束。冷源使壓縮過程在等溫下進行。 2 — 3等容加熱過程（熱量從回熱器傳遞給工作流體）： 置換活塞從頂端死點運動至底端死點，從而將工作流體從 冷源推入熱源，此時作功活塞靜止在它的頂端死點。工作 流體由冷源推入熱源的過程中，從回熱器中獲得其儲存的 熱量，工作流體溫度提高到熱源溫度TH，同時壓力升高。 3 —4等溫膨脹過程（工作流體獲得高溫熱源的熱量）： 置換活塞將全部工作流體推入熱源之後保持在底端死點位 置，相應地工作流體壓力升高到最大値。之後工作流體從 200825280 高溫熱源吸熱並等溫膨脹，推動作功活塞從頂端死點運動 至底端死點，這一過程中作功活塞帶動飛輪轉動，儲存機 械能備用。 4一 1等容冷卻過程（熱量從工作流體傳遞到回熱器）： 作功活塞運動至底端死點後保持靜止，置換活塞從它的底 端死點運動至頂端死點，從而將工作流體全部推入了冷源 中。工作流體從熱源進入冷源時加熱回熱器，其溫度降到 冷源溫度TL，壓力降低；回熱器儲存工作流體從熱源帶出 熱量。 史特靈循環的理論熱效率相當接近熱機的最大理論熱 效率，也就是卡諾循環（Carnot cycle )之熱效率。由於史 特靈熱機之熱端及冷端間之溫差傳熱及熱漏等問題，目前 實際的史特靈熱機之熱效率雖然遠低其理論値，但仍可達 2 0 〜2 5 % 。 蒸氣渦輪機介紹： 蒸氣渦輪機可利用具有低蒸發溫度之工作流體來堆 動，例如氨類或烷類等工作流體。工作流體之特性爲蒸發 溫度介於35°C至60°C的範圍，而冷凝溫度介於〇°C至30°C 的範圍。蒸氣渦輪機之作功方式爲工作流體藉由熱源加熱 蒸發氣化後，通過蒸氣渦輪機，蒸氣渦輪機榨取受熱氣化 的工作流體之能量來作功以供發電之用。工作流體經過渦 輪機榨取能量後降壓降溫並藉由冷源冷凝，接著通過流向 控制器回到熱源。蒸氣渦輪機大致以此方式作功，且其熱 效率可達30%以上。 200825280 熱泵系統介紹： 根據熱力學第2定律，熱量無法自發性地由冷源往熱 源流動。將熱量從冷源往熱源搬移必須輸入額外的能量， 而熱泵即是用來搬移熱量的機械。對熱泵輸入能量可使熱 泵同時產生熱源與冷源，以供應冷與熱的需求，使得將對 熱泵所輸入的能量作充分的利用，而達成最佳的能源利用 效率。 面臨之問題： 史特靈熱機因爲本身熱傳問題，例如熱端和冷端間的 溫差傳熱、系統運行中的熱漏、以及不可逆回熱過程，勢 必產生不可逆損失，從而使史特靈熱機效率低於卡諾熱機 效率5 0 % 。所以如何有效提升史特靈循環效率爲當務之 急。依據熱力學的原理，提高熱源溫度，降低冷源溫度將 可有效提高熱機之熱效率，使其更具經濟性。 在早爲眾所週知的技藝中，例如已揭示美國專利 US2004/0093864A1及歐洲專利EP167470A2包含史特靈熱 機之發電系統，以及已揭示於美國專利US2006/0225428A1 包含渦輪機之發電系統，這些習知技術都必需藉由燃燒燃 料以產生推動史特靈熱機的熱源或產生推動渦輪機的蒸氣 才能夠使發電機組運轉。燃燒石化燃料不僅會造成空氣污 染，而且會加劇溫室效應。此外，以目前對石化燃料的消 耗速度，將可預見隨著石化燃料存量逐漸減少，開採石化 燃料的費用及購買石化燃料的成本將會變得更加昂貴。使 用燃燒石化燃料的發電系統將會是問題。 200825280 【發明內容】 有鑑於前述問題，本發明提出一種新穎的發電系統， 除了能提供有利於熱機運轉的工作條件，而且能夠降低對 石化燃料的需求，減緩溫室氣體的排放。 此外，爲達成有效提高熱源溫度及降低冷源溫度之目 的，進而提高熱機的工作效率，本發明之發電系統利用熱 泵搬移已存在於環境中的熱量。藉由此方式可以同時有效 地提高熱源溫度及降低冷源溫度，使熱機在更有利的運轉 條件下運作，並將對熱泵輸入的能量作最佳的運用。 本發明之內容爲一種利用熱泵驅動之發電系統，其至 少包含：熱泵，其用於產生熱源及冷源；熱機，其以熱泵 所產生之熱源及冷源來驅動；及發電機組，其與熱機耦接 用以發電；其中藉由熱源及冷源對熱機之工作流體供熱及 供冷，以使熱機運轉而產生機械能，且藉由發電機組將機 械能轉變成電能。 本發明的另一方面，熱泵可以爲蒸氣壓縮式熱泵。蒸 氣壓縮式熱泵的壓縮機種類可採用離心式、螺旋式、渦捲 式、往復式或廻轉式等，但壓縮機型式與種類並非本發明 之限定條件。目前已知高效率之雙效型熱泵在冷熱源溫差 超過攝氏 25度以上之運轉條件下，其能源效率 COP(coefficient of performance)可達到 7 以上。 本發明的另一方面，熱機可以爲史特靈熱機。 本發明的另一方面，熱機可以爲蒸氣渦輪機，特別是 利用具有低蒸發溫度之工作流體來運轉的蒸氣渦輪機。此 200825280 渦輪機所用之工作流體可爲氨類、烷類及其他具低蒸發溫 度的流體或其組合。 本發明的另一方面，熱泵初始以啓動電力開始運轉。 直到發電機組產生足夠持續供給熱泵運轉之電力且將電力 回饋至熱泵’即可停止或逐漸減少啓動電力的輸入，並將 剩餘的電能（即淨電輸出）供應至電力需求端，如一般工 業與家庭電力需求。或者，熱泵持續以輔助電力運轉，而 發電機組所產生的電力全部供應至電力需求端。由於所產 生的電力不回饋至熱泵，故可獲得最大的淨電輸出。熱泵 的啓動電力及輔助電力可選自電力公司的供電、燃料電 池、蓄電池、太陽能電池模組、風力發電模組或其組合。 藉由熱泵有效地提高史特靈熱機或蒸氣渦輪機所需之 熱源溫度並降低其所需之冷源溫度，可有效達提高熱機之 熱效率。由於熱泵係利用對熱泵輸入的能量搬移已存在於 環境中熱量，進而產生熱機運轉所需的熱源及冷源，故相 較於傳統燃燒石油、煤炭及天然氣等發電方式，本發明之 發電系統可減少對石化燃料的需求，可避免溫室氣體的產 生’減緩溫室效應對環境的衝擊。在在顯示本發明之發電 系統確實對能源利用及溫室氣體排放等環保議題極具貢 獻。 【實施方式】 以下將以附圖並配合實施例對本發明技術特點作進一 步地說明，該實施例僅爲較佳的範例，並非用來限定本發 明之請求範圍。 200825280 如第2圖所示，本發明之第1實施例之發電系統至少 包含熱泵9、史特靈熱機5及發電機組6。 在第1實施例中，熱泵9初始以啓動電力開始運轉後， 隨即開始搬移已存在於環境中熱量，於是產生熱源及冷 源。熱泵的啓動電力可選自電力公司的供電、燃料電池、 蓄電池、太陽能電池模組、風力發電模組或其組合。藉由 熱源及冷源對史特靈熱機5之工作流體供熱及供冷，以使 史特靈熱機9運轉。接著，史特靈熱機5帶動與其耦接之 發電機組6，用以產生電力。直到發電機組6所產生之電 力足夠供熱泵9運轉且將電力回饋至熱泵，即可停止或逐 漸減少啓動電力的輸入，並將發電機組6產生的剩餘電力 (淨電輸出）供應至電力驅求端。 第3圖顯示本發明之第2實施例，其與第1實施例之 差別在於此例中的發電機組6並不將電力回饋給熱泵9。 如此，將可獲得最大的淨電輸出。熱泵9則是持續以輔助 電力運轉，輔助電力可選自電力公司的供電、電池、太陽 能電池模組、風力發電模組或其組合。 有別於前述使用史特靈熱機的第1及第2實施例，在 本發明之第3實施例中使用了蒸氣渦輪機1 2作爲發電系統 中的熱機。如第4圖所示，第3實施例之發電系統至少包 含熱泵9、蒸氣渦輪機1 2及發電機組6。蒸氣渦輪機工作 流體1 3在一封閉式的循環中與熱泵9之熱源7及冷源8作 熱交換。蒸氣渦輪機工作流體1 3較佳地由具有低蒸發溫度 之流體所構成，例如氨類、烷類、其他低蒸發溫度的流體 -10- 200825280 或其組合。熱泵9之熱源溫度大約在3 5至6 0 °C，冷源溫 度則大約在0至3 5 °C。由於蒸氣渦輪機工作流體1 3具有 低蒸發溫度特性，所以蒸氣渦輪機工作流體1 3可經由熱源 7加熱後蒸發氣化。接著，氣化之蒸氣渦輪機工作流體1 3 通過蒸氣渦輪機1 2，並藉由蒸氣渦輪機1 2將蒸氣渦輪機 工作流體1 3所帶有的能量榨取出來。通過蒸氣渦輪機i 2 後，蒸氣渦輪機工作流體1 3的溫度及壓力進一步下降，接 著流經冷源8並在此冷凝。形成液態的蒸氣渦輪機工作流 體1 3被進一步往熱源7傳送。 較佳地，在蒸氣渦輪機工作流體1 3從冷源8往熱源7 的路徑上設置流向控制器1 0，其可防止在熱源7氣化的蒸 氣渦輪機工作流體1 3由於壓力升高的緣故而逆向地朝冷 源8流動，而且有助於將蒸氣渦輪機工作流體1 3從冷源8 往熱源7傳送。流向控制器1 〇亦可爲供液泵。 蒸氣渦輪機1 2大致是以上述的方式來運轉。如同第1 實施例，熱泵9初始以啓動電力開始運轉後，隨即開始搬 移已存在於環境中熱量，如空氣、水或土壤等，於是產生 熱源7及冷源8。熱泵9的啓動電力可選自電力公司的供 電、燃料電池、蓄電池、太陽能電池模組、風力發電模組 或其組合。蒸氣渦輪機1 2帶動與其耦接之發電機組6，用 以產生電力。直到發電機組6所產生之電力足夠供熱栗9 運轉且將電力回饋至熱泵，即可停止或逐漸減少啓動電力 的輸入，並將發電機組6產生的剩餘電力（淨電輸出）供 應至電力驅求端。 -11- 200825280 如第5圖所示，本發明之第4實施例係根據第 例之另一修改例。如同第2實施例，發電機組6並 力回饋給熱泵9。如此，將可獲得最大的淨電輸出。 則是持續以輔助電力運轉，輔助電力可選自電力公 電、電池、太陽能電池模組、風力發電模組或其組 在第3實施中，蒸氣渦輪機工作流體1 3之路徑 通過熱泵9，並藉由熱泵9之工作流體直接對蒸氣 工作流體1 3加熱及冷卻。簡言之，熱泵係以直接熱 對熱機之工作流體供熱及供冷。由於蒸氣渦輪機工 1 3直接與熱泵9之工作流體作熱交換，好處是熱傳 且熱傳效率高。然而這樣的配置可能會有不易維修 缺點。 因此，在此提出本發明之第5實施例，其係根 實施例之另一修改例，如第6圖所示。在第5實施 透過熱傳元件1 1與熱泵9之工作流體作熱交換而在 外部形成外部熱源7 ’及外部冷源8 ’。 蒸氣渦輪機 體1 3係藉由外部熱源7 ’及外部冷源8 ’供熱及供冷 元件1 1可以爲熱管或熱非等向性材料等等。熱傳5 亦可由習知的熱交換器或熱傳流體迴路所構成。簡 熱泵以間接熱傳方式對熱機之工作流體供熱及供冷 的好處是設備之安裝及維修保養較爲容易。再者， 間的熱傳元件，蒸氣渦輪機與熱泵之配置較不容 制。然而，這樣會有較多的熱傳損失。 第5實施例之運作方式大致與第3實施例相同 3實施 不將電 熱泵9 司的供 合。 係直接 渦輪機 傳方式 作流體 損失少 保養的 據第3 例中， :熱泵9 工作流 。熱傳 6件η 言之， 。這樣 透過中 易受限 。熱栗 -12- 200825280 9初始以啓動電力開始運轉，隨即開始搬移已存在 中熱量。透過熱傳元件1 1在熱泵9外側產生外部 及外部冷源8’。熱泵9的啓動電力可選自電力公 電、燃料電池、蓄電池、太陽能電池模組、風力發 或其組合。藉由外部熱源7 ’及外部冷源8 ’對蒸氣渦 作流體1 3供熱及供冷以驅動蒸氣渦輪機1 2。蒸氣 1 2帶動與其耦接之發電機組6，用以產生電力。直 機組6所產生之電力足夠供熱泵9運轉且將電力回 泵，即可停止或逐漸減少啓動電力的輸入，並將發 6產生的剩餘電力（淨電輸出）供應至電力驅求端 如第7圖所示，本發明之第6實施例係根據第 例之另一修改例。發電機組6並不將電力回饋給熱 如此，將可獲得最大的淨電輸出。熱泵9則是持續 電力運轉，輔助電力可選自電力公司的供電、燃料 蓄電池、太陽能電池模組、風力發電模組或其組合 雖然在上述的實施例中，發電機組與熱機是各 的裝置，但是亦可將發電機組與熱機整合成單一模 相較於其他種類的熱機，適用於本發明之史特 及蒸氣渦輪機具有更好的熱效率。由於蒸氣渦輪機 產生旋轉運動，不須藉由連桿機構將往復運動轉換 運動。因此蒸氣渦輪機具有極佳的熱效率，一般而 3 0%以上。史特靈熱機之實際熱效率可達25% 。 史特靈熱機係一種能夠以任何形式的熱源及冷 轉，也就是只要有溫差即可使史特靈熱機運轉。因 於環境 熱源7’ 司的供 電模組 輪機工 渦輪機 到發電 饋至熱 電機組 〇 5實施 丨泵9。 以輔助 電池、 〇 自分離 組。 靈熱機 係直接 成旋轉 言可達 源來運 此，史 -13- 200825280 特靈熱機特別適合結合熱泵以供發電之用。在蒸氣渦輪機 中使用具有低蒸發溫度的工作流體，使得能夠以熱泵驅動 蒸氣渦輪機。 根據本發明之發電系統，藉由熱泵與熱機的結合，可 以進一步有效提高史特靈熱機或蒸氣渦輪機的熱效率。根 據本發明之發電系統，在發電過程將不會燃燒石化燃料， 故可減少溫室氣體的排放，減緩溫室效應對環境的衝擊。 以上僅爲本發明的較佳實施例，並不侷限本發明之實 施範圍，即不偏離後附的申請專利範圍所作之均等變化與 修飾，應仍屬本發明涵蓋範圍。 【圖式簡單說明】 第1圖爲史特靈循環之熱力循環溫熵圖； 第2圖爲本發明發電系統之第丨實施例之示意圖，其 中使用了史特靈熱機； 第3圖爲本發明發電系統之第2實施例之示意圖； 第4圖爲本發明發電系統之第3實施例之示意圖，其 中使用了蒸氣渦輪機； 第5圖爲本發明發電系統之第4實施例之示意圖； 第6圖爲本發明發電系統之第5實施例之示意圖；及 第7圖爲本發明發電系統之第6實施例之示意圖。 【元件符號說明】 1〜4 工作狀態點 T 溫度 s 熵 -14- 200825280 TH 熱源 Tl 冷源 5 史特 6 發電 7 熱源 8 冷源 7， 外部 8， 外部 9 熱泵 10 流向 11 熱傳 12 蒸氣 13 渦輪 溫度 溫度 靈熱機 機組 熱源 冷源 控制器 元件 渦輪機 機工作流體 -15BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation system, and more particularly to a power generation system that uses a heat pump to drive a heat engine to generate electric energy, wherein the heat engine may be a Stirling engine or a steam turbine. [Prior Art] Introduction to the Stirling Cycle: The Stirling cycle is a process of isothermal heat transfer and isovolumic expansion compression, and the ideal Stirling cycle has the same thermal efficiency as the Carnot cycle. The first picture shows Sterling. The relationship between temperature and entropy of the cycle, T is temperature, S is entropy, and 1~4 is 4 working state points, which are explained one by one: 1 1 2 isothermal compression process (heat transfer from working fluid to cold source): replacement piston After the working fluid is pushed into the cold source, it is kept at the top dead center position, and the working fluid is cooled to and maintained at the cold source temperature TL; the flywheel drives the working piston to compress the working fluid as the working piston moves from its bottom dead center to the top end. The compression process ends at the dead point. The cold source allows the compression process to proceed at isothermal temperatures. 2 - 3 isovolumic heating process (heat transfer from the regenerator to the working fluid): The displacement piston moves from the top dead center to the bottom dead center, thereby pushing the working fluid from the cold source into the heat source, at which time the work piston is stationary Its top dead point. The working fluid is pushed into the heat source by the cold source, the stored heat is obtained from the regenerator, the working fluid temperature is raised to the heat source temperature TH, and the pressure is increased. 3 - 4 isothermal expansion process (the working fluid obtains the heat of the high temperature heat source): The displacement piston maintains the bottom dead center position after pushing all the working fluid into the heat source, and accordingly the working fluid pressure rises to the maximum enthalpy. After that, the working fluid absorbs heat from the high temperature heat source of 200825280 and expands isothermally. The working piston moves from the top dead center to the bottom dead center. In this process, the working piston drives the flywheel to rotate, and the storage mechanism can be used. 4 to 1 isovolumic cooling process (heat transfer from working fluid to regenerator): the working piston moves to the bottom dead point and remains stationary, the displacement piston moves from its bottom dead center to the top dead center, which will work The fluid is pushed all the way into the cold source. The working fluid heats the regenerator from the heat source into the cold source, the temperature of which drops to the cold source temperature TL, and the pressure decreases; the regenerator stores the working fluid to remove heat from the heat source. The theoretical thermal efficiency of the Stirling cycle is quite close to the maximum theoretical thermal efficiency of the heat engine, which is the thermal efficiency of the Carnot cycle. Due to the temperature difference heat transfer and heat leakage between the hot end and the cold end of the Stirling heat engine, the thermal efficiency of the actual Stirling heat engine is still far lower than the theoretical one, but it can still reach 20 to 2 5 %. Introduction to Steam Turbines: Steam turbines can be operated with working fluids with low evaporation temperatures, such as working fluids such as ammonia or alkanes. The working fluid is characterized by an evaporation temperature in the range of 35 ° C to 60 ° C and a condensation temperature in the range of 〇 ° C to 30 ° C. The working mode of the steam turbine is that the working fluid is heated and evaporated by the heat source, and then vaporized by a steam turbine, and the steam turbine extracts the energy of the heated gasification working fluid for power generation. The working fluid is extracted by the turbine and then depressurized and cooled, condensed by a cold source, and then returned to the heat source by flow to the controller. Steam turbines work roughly in this way and have thermal efficiencies of more than 30%. 200825280 Introduction to heat pump system: According to the second law of thermodynamics, heat cannot spontaneously flow from a cold source to a heat source. The heat is transferred from the cold source to the heat source and additional energy must be input, and the heat pump is the machine used to move the heat. The input of energy to the heat pump allows the heat pump to generate both heat and cold sources to supply cold and heat, so that the energy input to the heat pump is fully utilized for optimum energy efficiency. Problems faced: Stirling heat engine because of its own heat transfer problems, such as temperature difference heat transfer between the hot end and the cold end, heat leak in the system operation, and irreversible heat recovery process, will inevitably cause irreversible loss, thus making the Stirling heat engine The efficiency is lower than the efficiency of the Carnot engine by 50%. Therefore, how to effectively improve the efficiency of the Stirling cycle is a top priority. According to the principle of thermodynamics, increasing the temperature of the heat source and lowering the temperature of the cold source can effectively improve the thermal efficiency of the heat engine and make it more economical. In the well-known art, for example, U.S. Patent No. 2004/0093864 A1 and European Patent No. EP 167 470 A2, which incorporate a Stirling heat engine power generation system, and a power generation system including a turbine disclosed in US 2006/0225428 A1, are required. The generator set can be operated by burning fuel to generate a heat source that drives the Stirling heat engine or to generate steam that drives the turbine. Burning fossil fuels not only causes air pollution, but also exacerbates the greenhouse effect. In addition, with the current rate of consumption of fossil fuels, it is foreseeable that as the fossil fuel stocks are gradually reduced, the cost of mining fossil fuels and the cost of purchasing fossil fuels will become more expensive. The use of a power generation system that burns fossil fuels will be a problem. 200825280 SUMMARY OF THE INVENTION In view of the foregoing, the present invention provides a novel power generation system that, in addition to providing operating conditions conducive to the operation of a heat engine, can reduce the demand for fossil fuels and reduce greenhouse gas emissions. Further, in order to achieve an objective of effectively increasing the temperature of the heat source and lowering the temperature of the cold source, thereby improving the operating efficiency of the heat engine, the power generation system of the present invention uses a heat pump to move heat existing in the environment. In this way, the heat source temperature can be effectively increased and the temperature of the cold source can be lowered at the same time, so that the heat engine can operate under more favorable operating conditions, and the energy input to the heat pump can be optimally utilized. The invention relates to a power generation system driven by a heat pump, which comprises at least: a heat pump for generating a heat source and a cold source; a heat machine driven by a heat source and a cold source generated by the heat pump; and a generator set and the heat engine The coupling is used for power generation; wherein the working fluid of the heat engine is heated and cooled by the heat source and the cold source, so that the heat engine operates to generate mechanical energy, and the mechanical energy is converted into electrical energy by the generator set. In another aspect of the invention, the heat pump can be a vapor compression heat pump. The type of compressor of the vapor compression heat pump may be a centrifugal type, a spiral type, a scroll type, a reciprocating type or a tumbling type, but the type and type of the compressor are not limited to the present invention. High-efficiency double-effect heat pumps are known to have a COP (coefficient of performance) of 7 or more under operating conditions where the temperature difference between the cold and the heat source exceeds 25 degrees Celsius. In another aspect of the invention, the heat engine can be a Stirling heat engine. In another aspect of the invention, the heat engine can be a steam turbine, particularly a steam turbine that operates with a working fluid having a low evaporation temperature. The working fluid used in this 200825280 turbine can be ammonia, alkanes and other fluids with low evaporation temperatures or a combination thereof. In another aspect of the invention, the heat pump initially begins to operate with starting power. Until the generator set generates enough power to continuously supply heat to the heat pump and feeds the power back to the heat pump', the input of the starting power can be stopped or gradually reduced, and the remaining power (ie, the net power output) is supplied to the power demand side, such as general industry and Household electricity demand. Alternatively, the heat pump continues to operate with auxiliary power, and all of the power generated by the generator set is supplied to the power demand side. Since the generated electricity is not fed back to the heat pump, the maximum net power output is obtained. The starting power and auxiliary power of the heat pump may be selected from the power supply of the power company, a fuel cell, a battery, a solar battery module, a wind power module, or a combination thereof. The heat efficiency of the heat engine can be effectively increased by effectively increasing the temperature of the heat source required by the Stirling heat engine or the steam turbine and lowering the temperature of the required cold source by the heat pump. Since the heat pump uses the energy input to the heat pump to move the heat already existing in the environment, thereby generating the heat source and the cold source required for the operation of the heat engine, the power generation system of the present invention can be compared with the conventional power generation modes of burning petroleum, coal, and natural gas. Reducing the demand for fossil fuels can avoid the generation of greenhouse gases' slowing the impact of the greenhouse effect on the environment. The power generation system showing the present invention is indeed contributing to environmental issues such as energy utilization and greenhouse gas emissions. The embodiments of the present invention will be further described with reference to the accompanying drawings and the accompanying drawings. This embodiment is only a preferred example and is not intended to limit the scope of the claims. 200825280 As shown in Fig. 2, the power generation system according to the first embodiment of the present invention includes at least a heat pump 9, a Stirling heat engine 5, and a generator set 6. In the first embodiment, after the heat pump 9 initially starts operating with the startup power, the heat stored in the environment is immediately started to be moved, so that a heat source and a cold source are generated. The startup power of the heat pump may be selected from a power supply of a power company, a fuel cell, a battery, a solar cell module, a wind power module, or a combination thereof. The working fluid of the Stirling heat engine 5 is heated and cooled by a heat source and a cold source to operate the Stirling heat engine 9. Next, the Stirling heat engine 5 drives the generator set 6 coupled thereto for generating electric power. Until the power generated by the genset 6 is sufficient for the heat pump 9 to operate and the power is fed back to the heat pump, the input of the starting power can be stopped or gradually reduced, and the surplus power (net power output) generated by the genset 6 can be supplied to the electric drive. end. Fig. 3 shows a second embodiment of the present invention, which differs from the first embodiment in that the genset 6 in this example does not feed power back to the heat pump 9. In this way, the maximum net power output will be obtained. The heat pump 9 is continuously operated to assist the electric power, and the auxiliary electric power may be selected from a power supply of a power company, a battery, a solar battery module, a wind power generation module, or a combination thereof. Unlike the first and second embodiments using the Stirling heat engine described above, the steam turbine 12 is used as a heat engine in the power generation system in the third embodiment of the present invention. As shown in Fig. 4, the power generation system of the third embodiment includes at least a heat pump 9, a steam turbine 12, and a generator set 6. The steam turbine working fluid 13 exchanges heat with the heat source 7 and the cold source 8 of the heat pump 9 in a closed cycle. The steam turbine working fluid 13 is preferably comprised of a fluid having a low evaporation temperature, such as ammonia, alkane, other low evaporation temperature fluids - 10 200825280 or combinations thereof. The heat source temperature of the heat pump 9 is about 35 to 60 °C, and the temperature of the cold source is about 0 to 35 °C. Since the steam turbine working fluid 13 has a low evaporation temperature characteristic, the steam turbine working fluid 13 can be vaporized by heating and then evaporating via the heat source 7. The vaporized vapor turbine working fluid 13 then passes through the steam turbine 12 and extracts the energy carried by the steam turbine working fluid 13 by the steam turbine 12. After passing through the steam turbine i 2 , the temperature and pressure of the steam turbine working fluid 13 are further lowered, and then passed through the cold source 8 where it condenses. The vapor turbine working fluid 13 forming a liquid state is further transferred to the heat source 7. Preferably, a flow to the controller 10 is provided in the path of the steam turbine working fluid 13 from the cold source 8 to the heat source 7, which prevents the steam turbine working fluid 13 vaporized at the heat source 7 from increasing due to pressure. It flows counter to the cold source 8 and helps to transfer the steam turbine working fluid 13 from the cold source 8 to the heat source 7. The flow direction controller 1 can also be a liquid supply pump. The steam turbine 12 operates substantially in the manner described above. As in the first embodiment, after the heat pump 9 initially starts operating with the startup power, it immediately starts to move heat that has existed in the environment, such as air, water or soil, thereby generating the heat source 7 and the cold source 8. The starting power of the heat pump 9 may be selected from the power supply of a power company, a fuel cell, a battery, a solar cell module, a wind power module, or a combination thereof. The steam turbine 1 2 drives a generator set 6 coupled thereto for generating electric power. Until the power generated by the genset 6 is sufficient for the hot pump 9 to operate and the power is fed back to the heat pump, the input of the starting power can be stopped or gradually reduced, and the surplus power (net power output) generated by the genset 6 is supplied to the electric drive. Seek the end. -11- 200825280 As shown in Fig. 5, a fourth embodiment of the present invention is another modification according to the first example. As in the second embodiment, the genset 6 is fed back to the heat pump 9 in unison. In this way, the maximum net power output will be obtained. The operation is continued with auxiliary power, and the auxiliary power may be selected from the group consisting of electric power, battery, solar battery module, wind power module or a group thereof. In the third embodiment, the path of the steam turbine working fluid 13 passes through the heat pump 9, and The vapor working fluid 13 is directly heated and cooled by the working fluid of the heat pump 9. In short, the heat pump supplies heat and cooling to the working fluid of the heat engine with direct heat. Since the steam turbine worker directly exchanges heat with the working fluid of the heat pump 9, the heat transfer efficiency and heat transfer efficiency are high. However, such a configuration may have the disadvantage of being difficult to repair. Therefore, a fifth embodiment of the present invention is proposed herein, which is another modification of the embodiment of the present invention, as shown in Fig. 6. In the fifth embodiment, the external heat source 7' and the external cold source 8' are externally formed by heat exchange between the heat transfer element 1 1 and the working fluid of the heat pump 9. The steam turbine body 13 is heated by the external heat source 7' and the external cold source 8' and the cooling element 1 1 may be a heat pipe or a thermally non-isotropic material or the like. The heat transfer 5 can also be constituted by a conventional heat exchanger or a heat transfer fluid circuit. The advantage of the heat pump in the indirect heat transfer method for the heating and cooling of the working fluid of the heat engine is that the installation and maintenance of the equipment is relatively easy. Furthermore, the arrangement of the heat transfer elements between the steam turbine and the heat pump is less acceptable. However, there will be more heat transfer losses. The operation mode of the fifth embodiment is substantially the same as that of the third embodiment. 3 The electric heat pump 9 is not supplied. It is a direct turbine transmission method with less fluid loss. According to the third example, the heat pump 9 is working. Heat transmission 6 pieces η words, . This is limited by the medium. Hot Li -12- 200825280 9 Initially started with the start-up power, and then began to move the existing heat. An external and external cold source 8' is generated outside the heat pump 9 through the heat transfer element 11. The starting power of the heat pump 9 can be selected from the group consisting of electric power, fuel cells, batteries, solar modules, wind power, or a combination thereof. The vapor vortex fluid 13 is heated and cooled by the external heat source 7' and the external cold source 8' to drive the steam turbine 12. The steam 1 2 drives the generator set 6 coupled thereto for generating electric power. The power generated by the direct unit 6 is sufficient for the heat pump 9 to operate and the power is pumped back to stop or gradually reduce the input of the starting power, and supply the surplus power (net power output) generated by the transmission 6 to the power drive end. As shown in Fig. 7, the sixth embodiment of the present invention is another modification according to the first example. The genset 6 does not return power to the heat so that the maximum net power output will be obtained. The heat pump 9 is continuously operated, and the auxiliary power may be selected from a power supply of a power company, a fuel battery, a solar battery module, a wind power module, or a combination thereof. In the above embodiments, the generator set and the heat engine are each device. However, it is also possible to integrate the generator set and the heat engine into a single mode compared to other types of heat engines, and the Stoke and steam turbines suitable for the present invention have better thermal efficiency. Since the steam turbine produces a rotational motion, it is not necessary to switch the reciprocating motion by the link mechanism. Therefore, steam turbines have excellent thermal efficiency, generally more than 30%. The actual thermal efficiency of the Stirling heat engine is up to 25%. The Stirling heat engine is a heat source that can be used in any form and cold, that is, the Stirling heat engine can be operated as long as there is a temperature difference. Because of the environmental heat source 7's power supply module turbine turbine to power generation to the thermal motor unit 〇 5 implementation of the pump 9. To assist the battery, 〇 self-separating group. The spirit heat engine is directly converted into a rotating source. This history -13- 200825280 The Turing heat engine is especially suitable for combining heat pumps for power generation. The use of a working fluid having a low evaporation temperature in a steam turbine enables the steam turbine to be driven by a heat pump. According to the power generation system of the present invention, the thermal efficiency of the Stirling heat engine or the steam turbine can be further effectively improved by the combination of the heat pump and the heat engine. According to the power generation system of the present invention, fossil fuels will not be burned during the power generation process, thereby reducing greenhouse gas emissions and mitigating the impact of the greenhouse effect on the environment. The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and the equivalent variations and modifications may be made without departing from the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a thermodynamic cycle temperature entropy diagram of the Stirling cycle; Fig. 2 is a schematic view of a third embodiment of the power generation system of the present invention, in which a Stirling heat engine is used; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 4 is a schematic view showing a third embodiment of a power generation system according to the present invention, in which a steam turbine is used; FIG. 5 is a schematic view showing a fourth embodiment of the power generation system of the present invention; 6 is a schematic view showing a fifth embodiment of the power generation system of the present invention; and FIG. 7 is a schematic view showing a sixth embodiment of the power generation system of the present invention. [Component Symbol Description] 1~4 Operating State Point T Temperature s Entropy-14- 200825280 TH Heat Source Tl Cold Source 5 Sterling 6 Power Generation 7 Heat Source 8 Cold Source 7, External 8, External 9 Heat Pump 10 Flow 11 Heat Transfer 12 Vapor 13 Turbine temperature and temperature heat engine unit heat source cold source controller component turbine machine working fluid-15