كيفية استخدام الطاقة الحرارية الأرضية لتقليل تكاليف الاحتباس الحراري؟

اليوم، أود أن أعرض حالة استخدام الطاقة الحرارية الأرضية لتقليل تكاليف الدفيئة، في مجمع Caijin للزراعة الذكية الصناعية في ديتشو، شاندونغ، الصين.

This park covers an area of 505 acres with a total investment of 473 million yuan. How did they do it? They utilized “mid-deep geothermal energy” from underground, replacing the traditional “natural gas.”

They constructed 4 production wells and 6 reinjection wells, adopted “high-temperature water source heat pump” technology, building 1 geothermal energy station with a total heating capacity of about 21712 kW, which can meet the heating needs of 254,000 square meters of greenhouses.

This project utilizes the thermal storage of the Neogene Guantao Formation, which is buried at depths of more than 1200 meters. The single well has an output of 100 cubic meters per hour, with a water temperature of 52°C.

The well casing uses standard oil well casing (steel grade J55), which has a service life of more than 50 years. The geothermal wells use directional drilling technology, ensuring a reasonable well spacing, which can effectively prevent the “thermal breakthrough” phenomenon during wastewater reinjection.

They also adopted a three-stage heat exchange model. After the geothermal water (52°C) goes through the three-stage heat exchanger (reaching about 17°C), it is reinjected into the Neogene Guantao Formation, which is buried at depths of more than 1200 meters, achieving “in-layer and equal-volume reinjection, extracting heat without consuming water.” This allows for the sustainable use of geothermal energy.

The project leader introduced, this is the first time in Dezhou City that the ‘high-temperature water source heat pump’ technology has been used for three-stage heat exchange to increase temperature.

The heating circulation medium is heated to (35-46°C) in the first stage, then further heated to (46-65°C) by a secondary custom high-temperature centrifugal heat pump unit, and finally enters a third-stage custom high-temperature screw-type heat pump unit to increase the temperature to (65-80°C) for heating the planting greenhouses.

He said we have saved 101,500 tons of standard coal and reduced carbon dioxide emissions by 24,000 tons. The smart agriculture greenhouses can save more than 11 million yuan in operating costs every year.

كما قاموا ببناء نظام ذكي لإدارة الطاقة والتحكم فيها ومنصة للمراقبة. يمكن لنظام التحكم الذكي التحكم تلقائيًا في درجة حرارة الماء وتدفقه وفقًا لتغيرات درجة الحرارة المحيطة الخارجية والدفيئات الزراعية’ احتياجات التدفئة، مما يضمن أن النظام بأكمله يعمل بكفاءة، ويوفر الطاقة، ويعمل بشكل مستقر.

تجري منصة المراقبة مراقبة في الوقت الفعلي للبيانات مثل مستوى المياه، ودرجة حرارة الماء، وتدفق آبار الإنتاج ومستوى المياه، ودرجة حرارة إعادة الحقن، وحجم إعادة الحقن لآبار إعادة الحقن، مما يحقق الإدارة الفعالة والاستخدام العلمي.