植基於質子交換膜燃料電池熱電共生系統之技術發展

Technological Development of a PEMFC-Based CHP System

以純氫作為質子交換模燃料電池之發電燃料必須克服高成本的機件設備與發電成本之後，才適合當作分散式發電機組的選擇。而燃料電池結合熱電共生（CHP）的發電技術可同時供應電力與熱能，因此能大幅的提升氫能源的使用效率。本文的目的在於建構小型的質子交換模燃料電池熱電共生發電系統，並探討本系統的技術與經濟的可行性。本燃料電池熱電共生系統主要包含了一個額定發電量為2.5 kW的燃料電池堆、氫氣供應系統、空氣供應系統、水熱管理系統與熱回收系統。並藉由可程式自動控制器（PAC）主機之監控系統，來實現本發電平台自動化運轉的目的。而系統電力、溫度、壓力與流量等參數的資料被建立在以網際網路為基礎的人機介面上，方便研究人員遠端監控進行分析與評估本發電系統的性能。經初步測試本研究所發展的質子交換膜燃料電池熱電共生系統，顯示真備有優質的電力與熱力的輸出性能，系統的熱電共生的總能源使用效率可穩定地達到73%。 Hydrogen fed PEMFC has to overcome high installation and operation cost before being adopted as a distributed power candidate. Cogeneration of power and heat is a good approach to increase hydrogen energy utilization rate A micro PEMFC-based power and heat cogeneration system is proposed and established in the current study to investigate system's technological and economical feasibility. This CHP system composes of a 2.5 kW fuel cell stack, hydrogen supply system, air supply system, water and heat management system and heat recovery system The control strategies to automate the system operation are realized by a PAC system. Detailed measurement of the system is also constructed along with a web-based HMI platform to facilitate experiments and demonstration Preliminary testing of the CHP system showed good performance of heat and power outputs. System combined efficiency is measured at about 73%.