{"query_echo":{"q":"","filters":{"analysis_type":["technical practice"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'technical practice' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":2,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=technical+practice","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"catf-000821","url":"https://climateinsightsdirectory.org/document/catf-000821","title":"Move Fire Gates In to Reduce Venting at Compressor Stations 内移防火闸以减少压缩泵站气体排放","publisher":{"name":"Clean Air Task Force","organization":"clean-air-task-force"},"document_type":"fact sheet","language":"zh","date_published":null,"source_url":"https://cdn.catf.us/wp-content/uploads/2025/12/04052547/CH_move-fire-gates.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","analysis_type"],"summary":{"text":"The document outlines a Partner Reported Opportunity (PRO) to reduce methane venting at compressor stations by moving fire gate valves closer to the facility. This relocation reduces the length of the pipeline isolated from the facility, thereby decreasing the volume of gas released through Emergency Shutdown (ESD) systems. One partner reported reducing methane emissions by nearly 7.1 million cubic feet within one year across three facilities. The economic analysis suggests that for a 24-inch pipeline with a 2,000-foot isolation length at 900 psia operated four times annually, methane savings can reach 1,700 thousand cubic feet per year, with investment costs potentially ranging from under $1,000 to over $10,000 and payback periods between 0 and 10+ years.","ai_generated":true,"unit":"catf-000821#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"The economic impact varies by investment level: costs under $1,000 have a payback period of 0-1 years, costs between $1,000 and $10,000 have a payback of 1-3 years, and costs over $10,000 have a payback of 3-10 years or more than 10 years.","ai_generated":true,"unit":"catf-000821#insight-1","date_modified":"2026-10-23"}],"climate_tags":["methane emissions","natural gas"],"geography_discussed":[],"frame_perspective":[],"analysis_type":["technical practice","economic analysis"]},{"id":"catf-000826","url":"https://climateinsightsdirectory.org/document/catf-000826","title":"用氮气测试门站内的减压阀","publisher":{"name":"Clean Air Task Force","organization":"clean-air-task-force"},"document_type":"fact sheet","language":"zh","date_published":null,"source_url":"https://cdn.catf.us/wp-content/uploads/2025/12/04052606/CH_test-gate-station-pressure-relief-valves.pdf","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","analysis_type"],"summary":{"text":"The document outlines a method to eliminate methane emissions during the testing of pressure relief valves (PRVs) by substituting natural gas with high-pressure nitrogen. A partner report indicates that applying this method to 120 PRVs can reduce methane emissions by 10,000 cubic feet per year, while another case involving 100 valves saved 8,000 cubic feet per year. The primary motivation for using nitrogen is safety, particularly where sour gas is present, with the methane reduction serving as a co-benefit. The practice requires nitrogen cylinders with pressure exceeding the PRV set point and involves minimal additional costs since labor remains constant regardless of the gas used.","ai_generated":true,"unit":"catf-000826#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Another reported case involving 100 PRVs resulted in annual methane savings of 8,000 cubic feet.","ai_generated":true,"unit":"catf-000826#insight-1","date_modified":"2026-10-23"},{"text":"The primary objective of using nitrogen over methane for PRV testing is safety, especially in cases where natural gas releases pose safety or environmental hazards, such as the presence of sour gas.","ai_generated":true,"unit":"catf-000826#insight-2","date_modified":"2026-10-23"},{"text":"The economic impact is limited to the additional cost of nitrogen, as labor costs are identical to those of natural gas testing and no equipment investment is required.","ai_generated":true,"unit":"catf-000826#insight-3","date_modified":"2026-10-23"}],"climate_tags":["methane emissions"],"geography_discussed":[],"frame_perspective":[],"analysis_type":["case study","technical practice"]}]}