{"id":2914,"date":"2024-02-05T12:22:25","date_gmt":"2024-02-05T12:22:25","guid":{"rendered":"https:\/\/fairconditioning.org\/fc-activity\/?post_type=activity&p=2914"},"modified":"2024-02-05T12:22:25","modified_gmt":"2024-02-05T12:22:25","slug":"carbon-offset-from-acs-2","status":"publish","type":"activity","link":"https:\/\/fairconditioning.org\/fc-activity\/activity\/carbon-offset-from-acs-2\/","title":{"rendered":"Carbon Offset from AC\u2019s"},"content":{"rendered":"\n
Objective<\/h5>\n\n\n\n

To estimate the number of trees required to offset GHG emissions of refrigerants from ACs installed in college buildings.<\/p>\n\n\n\n

Outcome<\/h5>\n\n\n\n

Students will realise that offsetting carbon emissions from AC\u2019s by planting trees is an impractical solution.<\/p>\n\n\n\n

Requirements<\/h5>\n\n\n\n

Details of AC\u2019s installed in their own college campus.<\/p>\n\n\n\n

Prerequisites<\/h5>\n\n\n\n

A conceptual knowledge of\u00a0<\/p>\n\n\n\n

    \n
  1. Carbon Footprinting.<\/li>\n\n\n\n
  2. Global Warming Potential (GWP).<\/li>\n<\/ol>\n\n\n\n
    Given Data<\/h5>\n\n\n\n
      \n
    1. 1 tree absorbs approximately 0.25 ton of CO2<\/sub> in its lifetime.<\/li>\n\n\n\n
    2. Life-cycle refrigerant charge (C) approx. equals 1.5 kg of refrigerant\/TR<\/li>\n\n\n\n
    3. 1 ton = 1000 kg<\/li>\n<\/ol>\n\n\n\n
      Procedure<\/h5>\n\n\n\n

      Step 1: <\/em><\/strong>Students find out the total air conditioning load (TR) of the campus.<\/p>\n\n\n\n

      Step 2: <\/em><\/strong>Students find out the refrigerants used in the AC\u2019s installed in college campus.<\/p>\n\n\n\n

      Step 3: <\/em><\/strong>Estimate the total amount of refrigerants used in AC\u2019s in the college campus (kg of refrigerant).<\/p>\n\n\n\n

      Step 4:<\/em><\/strong> Estimate the carbon emissions from the refrigerants used in AC\u2019s in the college building in CO2<\/sub> equivalent (t CO2<\/sub>e).<\/p>\n\n\n\n

      Step 5:<\/em><\/strong> Estimate the number of trees to be planted to offset the emissions from refrigerant usage in the college building.<\/p>\n\n\n\n

      Sample Calculations\u00a0<\/h5>\n\n\n\n

      Step 1:<\/em><\/strong> Air conditioning load in college campus (TR) = 40 TR<\/p>\n\n\n\n

      Step 2-3-4:<\/em><\/strong> <\/p>\n\n\n\n

      Refrigerant Name<\/em><\/strong><\/td>R22<\/em><\/td>R134a<\/em><\/td>Total<\/em><\/td><\/tr>
      Cooling Load in the Building (L) (TR)<\/em><\/strong><\/td>20<\/td>20<\/td>40<\/td><\/tr>
      Total Refrigerant used in building (CxL) (T) (kg of refrigerant)<\/em><\/strong><\/td>30<\/td>30<\/td>60<\/td><\/tr>
      GWP (kg of CO2<\/sub>kg of refrigerant\/kg of refrigerant)<\/em><\/strong><\/td>1810<\/td>1430<\/td>–<\/td><\/tr>
      Carbon Emissions from refrigerants (E) = T x GWP (kg of CO2<\/sub>e)<\/em><\/strong><\/td>54,300<\/td>42,900<\/td>97,200<\/td><\/tr>
      Carbon Emissions from refrigerants (tCO2<\/sub>e) = E\/1000<\/em><\/strong><\/td>54.3<\/td>42.9<\/td>97.2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Hence, Emissions from refrigerants used for AC\u2019s in entire college building in t CO2<\/sub>e = 97.2 t CO2<\/sub>e <\/p>\n\n\n\n

      Step 5: <\/em><\/strong>No. of Trees to be planted to offset GHG Emissions of refrigerants used in college building = Carbon Emissions from refrigerants (t CO2<\/sub>e)<\/em><\/strong>\/Lifetime Carbon Absorption Capacity of one tree (t CO2<\/sub>e)<\/em><\/strong><\/p>\n\n\n\n

      <\/em><\/strong>= 97.2\/0.25<\/p>\n\n\n\n

      =390 trees<\/p>\n\n\n\n

      References<\/h5>\n\n\n\n

      To learn more about carbon footprint, refer Supplementary Notes Section<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

      Objective To estimate the number of trees required to offset GHG emissions of refrigerants from ACs installed in college buildings. Outcome Students will realise that offsetting carbon emissions from AC\u2019s by planting trees is an impractical solution. Requirements Details of AC\u2019s installed in their own college campus. Prerequisites A conceptual knowledge of\u00a0 Given Data Procedure […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"inline_featured_image":false},"activity_subject":[112,124,125],"academic_year":[68,69],"complexity":[61,60],"content_tags":[387,412,416],"activity_type":[371],"activity_duration":[173],"acf":[],"_links":{"self":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2914"}],"collection":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity"}],"about":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/types\/activity"}],"author":[{"embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/comments?post=2914"}],"version-history":[{"count":1,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2914\/revisions"}],"predecessor-version":[{"id":2915,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2914\/revisions\/2915"}],"wp:attachment":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/media?parent=2914"}],"wp:term":[{"taxonomy":"activity_subject","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_subject?post=2914"},{"taxonomy":"academic_year","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/academic_year?post=2914"},{"taxonomy":"complexity","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/complexity?post=2914"},{"taxonomy":"content_tags","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/content_tags?post=2914"},{"taxonomy":"activity_type","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_type?post=2914"},{"taxonomy":"activity_duration","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_duration?post=2914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}