阿拉斯加的引擎廢熱回收

Application: Engine Waste Heat Recovery
Power Output: 90 kWe (3 units)

ElectraTherm, in collaboration with Electric Power Systems, Inc. 和 Engineered Solutions Group, Inc., commissioned a $2.35 million dollar upgrade to the City of Unalaska’s (AK) power plant. The project objective was to increase the efficiency of Dutch Harbor’s aging power plant in the remote Aleutian islands of Alaska. Here, in the remote Aleutian islands of Alaska where costs of power are some of the highest in North America, improving fuel efficiency and adopting clean energy technologies are crucial for maintaining a reliable supply of power.

The upgrade consisted of the installation of three Organic Rankine Cycle (ORC) units, Power+ Generators, designed for low temperature engine waste heat recovery. ElectraTherm’s waste heat recovery system uses the available thermal energy supplied from the jacket water of a single CAT C280-16 and two Wartsila W12V32 engines to generate approximately 90 kWe for the site.

Based on the data collected over a one-year period following project completion, the city realized an average daily payback of 2,100 kWh. This equates to an estimated 45,000 to 50,000 gallons of fuel saved yearly – amounting to annual savings of $250,000.

During the first 15,000 hours, ElectraTherm’s engine waste heat recovery system realized 98% operational availability – an indicator of ElectraTherm’s commitment to reliable ORC systems. Data logs indicate that the ORC system increased overall energy efficiency up to 8%.

Additionally, by utilizing the thermal energy (waste heat) in the engines’ jacket water with an ORC, the cooling load substantially reduced – further improving return on investment and energy efficiency.

This installation is one of ElectraTherm’s first ORC engine waste heat recovery applications on prime power diesel gensets. ElectraTherm more recently commissioned an engine waste heat recovery system with integration partner, B:Power, at Nanpohnmal Power Plant, Pohnpei Micronesia.

At the site, hot water enters the ORC system where it heats a working fluid into pressurized vapor. As the vapor expands, it drives ElectraTherm’s patented twin screw power block, which spins an electric generator and produces power. All three ORC generators utilize one cooling loop, sea water with an inlet temperature of 45°F.

“I left ElectraTherm [training] with a 100% satisfaction in the product that we have received and the support that comes along with the purchase. ElectraTherm is taking a business approach that tends to have been forgotten today: quality and service first. ElectraTherm’s upfront approach, product quality, customer service and attention to detail far exceed any industry standard.”
-Matthew Scott, Electrical Engineering Technician for City of Unalaska

 

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關於 ElectraTherm

BITZER Group 的 ElectraTherm 利用有機朗肯循環及專有技術將低溫熱能轉換為清潔電力，提供世界級的廢熱回收解決方案。ElectraTherm 簡單有效的解決方案可產生乾淨電力、提高效率、降低能源成本並減少廢氣排放，且無需額外消耗燃料。ElectraTherm 已向 13 個國家運送了 100 多台 ORC 裝置，運行時間超過 2,000,000 小時，是小型廢熱回收領域的全球領導者。

BITZER是全球最大的獨立製冷壓縮機製造商，擁有近3,500名全球員工，年均銷售額接近10億美元，ElectraTherm的工程技術優勢與BITZER的支持價值相結合，使ElectraTherm團隊能夠繼續開發行業領先的ORC技術，這對企業和地球都有好處。

ElectraTherm 的 電源+發電機 是一種熱轉電解決方案，可將廢熱轉換為清潔的電力和可用的熱能。該 主動冷卻器 可作為淨零冷卻發電解決方案，使用相同的 ORC 製程在發電的同時提供自供電冷卻。ElectraTherm 的這兩種解決方案均可減少排放和能源成本，同時提供基荷電力/冷卻供給。利用廢熱不僅有利可圖，而且非常實用。讓企業在實現可持續發展目標的同時，從更多的循環經濟中獲益。