單閃式及雙循環式地熱發電系統研究與最佳化
Other Title
The Optimization of Single-Flash Systems and Binary Cycle Systems
Journal
太陽能及新能源學刊
Journal Volume
16
Journal Issue
2
Start Page
3
End Page
8
ISSN
2311-5017
Date Issued
2014-12
Author(s)
Abstract
台灣在先天地理環境上較缺乏充足之石化資源，但卻因處於環太平洋火環帶上，地底下含有充沛的地熱資源未來可發展為基載電力提供之來源。根據地質環境與蒸氣之條件，現行的地熱電廠可分為三種主要之型態：乾蒸氣系統、閃發式系統、雙循環系統。在本篇研究中，將藉由現已運作之菲律賓Mak-Ban電廠探討最佳單閃式系統之操作條件，以及國內使用雙循環系統電廠之渦輪組，探討其工作流體之適用環境。並針對兩種分析結果比對探討，結果顯示在150℃以下，雙循環系統有較高的運轉效率及較多的做功量。經過實地探勘，台灣宜蘭紅柴林地區之地熱目前約在80-120℃之間，在這個區間範圍內，單閃式系統的效率約為8.1%，每單位蒸氣做功量為13.47kJ/kg，但雙循環系統的效率約為11.14%，每單位蒸氣做功量為26.95 kJ/kg。因此可知對此地區的地熱現況來說，雙循環是較為適合的系統。
Taiwan is a country with short fossil fuel resources, but in the Pacific Ring of Fire with great underground thermal energy. The development of geothermal power can be used as the basic load power generation in the hereafter. In terms of geographical environment and steam conditions, there are three general types of geothermal power plant systems: dry steam system, flash steam system, and binary system. In this paper, based on the Philippines Mak-Ban geothermal power plant database to investigate the optimal performance for the single-flash system. And analysis different working fluids for binary system turbine. The results show that when production well temperature is lower than 150°C, the binary systems have higher efficiency and more work. Currently, the production well temperature at Yilan erea in Taiwan is about 80-120°C. In this interval, the efficiency and the power per unit steam of single-flash systems are 8.1% and 13.47kJ/kg, but can reach up to 11.14% and 26.95 kJ/kg if we choose binary systems. So we know that the binary system is more suitable for Yilan erea in Taiwan.
Subjects
地熱
單閃發系統
雙循環系統
Geothermal
Single-Flash System
Binary System
Type
journal article