{"id":2492,"date":"2023-06-15T05:22:12","date_gmt":"2023-06-15T05:22:12","guid":{"rendered":"https:\/\/fairconditioning.org\/fc-activity\/?post_type=activity&p=2492"},"modified":"2023-06-15T05:22:12","modified_gmt":"2023-06-15T05:22:12","slug":"air-conditioners-water-generation","status":"publish","type":"activity","link":"https:\/\/fairconditioning.org\/fc-activity\/activity\/air-conditioners-water-generation\/","title":{"rendered":"Air Conditioner’s Water Generation"},"content":{"rendered":"\n
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Objective<\/h5>\n\n\n\n

To estimate the water generated from the dehumidification of fresh-air cooling load in a bedroom.<\/p>\n\n\n\n

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

Students will realize that water generated from dehumidification of air while cooling a room by Airconditioning, can be used for handy purposes (like gardening)<\/p>\n\n\n\n

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

Psychrometric chart<\/p>\n\n\n\n

Prerequisites<\/h5>\n\n\n\n
    \n
  1. Conceptual knowledge of psychrometry and psychrometric chart<\/li>\n\n\n\n
  2. Understanding of the phenomenon of Enthalpy and Humidity ratio.<\/li>\n<\/ol>\n\n\n\n

    Given Data:<\/em><\/strong><\/p>\n\n\n\n

    Design Conditions (peak summer)<\/p>\n\n\n\n

      \n
    1. Ambient : DB = 40\u00b0C, RH = 60%<\/li>\n\n\n\n
    2. Desired : DB = 24\u00b0C, RH = 50%<\/li>\n\n\n\n
    3. Cooling Load : 0.8 TR (calculated in the last activity)<\/li>\n\n\n\n
    4. Density of air : 1.12 kg\/m3<\/sup><\/li>\n\n\n\n
    5. AC Operation hours (daily average) : 2 hours<\/li>\n<\/ol>\n\n\n\n

      DB – Dry Bulb temperature, RH – Relative Humidity<\/p>\n\n\n\n

      Conversion Factors:<\/p>\n\n\n\n

        \n
      1. 1 kW = 1 kJ\/s<\/li>\n\n\n\n
      2. 1 hr = 3,600 s<\/li>\n\n\n\n
      3. 1 TR = 3.517 kW of cooling<\/li>\n<\/ol>\n\n\n\n
        Procedure<\/h5>\n\n\n\n

        Step 1:<\/em><\/strong> Estimate the Enthalpies and Specific Humidity Ratios (\u2375) of Ambient and Desired Air Conditions (g H2<\/sub>O\/kg air) and \u2206\u2375.<\/p>\n\n\n\n

        Step 2: <\/em><\/strong>Estimate the required volumetric air flow rate (m3<\/sup> air\/hr); convert to mass flow rate (kg air\/hr).<\/p>\n\n\n\n

        Step 3: <\/em><\/strong>Estimate cooling required (kg air\/hr x g H2O\/kg air). <\/p>\n\n\n\n

        Step 4: <\/em><\/strong>Determine annual water generation by multiplying with hours of AC operation per year.<\/p>\n\n\n\n

        Step 5:<\/em><\/strong> Reflect on ways to capture the water generated from Air conditioners.<\/p>\n\n\n\n

        Calculations:<\/em><\/strong><\/p>\n\n\n\n

        Step 1:<\/em><\/strong> Enthalpy and Humidity Ratio values<\/p>\n\n\n\n

        <\/td>Unit<\/em><\/strong><\/td>Ambient<\/em><\/strong><\/td>Desired<\/em><\/strong><\/td>Difference<\/em><\/strong><\/td><\/tr>
        Enthalpy (H)<\/em><\/strong><\/td>kJkg<\/td>48.5<\/td>114<\/td>65.5<\/td><\/tr>
        Humidity Ratio (w)<\/em><\/strong><\/td>g H2Okg air<\/td>29<\/td>9<\/td>20<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

        Step 2: <\/em><\/strong>Mass flow rate of air (ma<\/sub>) (kghr) = (Heat Load (TR) 3.517) (kJs) 3600 (shr)\u0394H (kghr)<\/p>\n\n\n\n

        = 0.8 3.517 360065.5 <\/p>\n\n\n\n

        = 154.64 kghr<\/p>\n\n\n\n

        Step 3: <\/em><\/strong>Water generated (kghr) (Wg<\/sub>) = mass flow rate of air (kg airhr) x \u0394\u2375 (g H20kg air)1000 g H2Okg H2O <\/p>\n\n\n\n

        = 154.64 22.51000<\/p>\n\n\n\n

        = 3.48 kghr<\/p>\n\n\n\n

        Step 4: <\/em><\/strong>Annual water generation (kgyr) = Wg<\/sub> (kghr) x average daily operation x 365 (no. <\/p>\n\n\n\n

        of days in a year)<\/p>\n\n\n\n

        = 3.48 x 2 x 365<\/p>\n\n\n\n

        = 2,540 <\/em><\/strong>kg<\/em><\/strong>yr<\/em><\/strong><\/p>\n\n\n\n

        Reference image:<\/em><\/strong><\/p>\n\n\n\n

        \"\"\/<\/figure>\n\n\n\n

        Enthalpies & Humidity Ratios for different air conditions<\/em><\/p>\n\n\n\n

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

        None<\/p>\n\n\n\n

        Source of Idea<\/h5>\n\n\n\n

        <\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

        Objective To estimate the water generated from the dehumidification of fresh-air cooling load in a bedroom. Outcome Students will realize that water generated from dehumidification of air while cooling a room by Airconditioning, can be used for handy purposes (like gardening) Requirements Psychrometric chart Prerequisites Given Data: Design Conditions (peak summer) DB – Dry Bulb […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"inline_featured_image":false},"activity_subject":[124,125],"academic_year":[68],"complexity":[61,60],"content_tags":[387,422,433,514],"activity_type":[371],"activity_duration":[172],"acf":[],"_links":{"self":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2492"}],"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=2492"}],"version-history":[{"count":1,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2492\/revisions"}],"predecessor-version":[{"id":2493,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity\/2492\/revisions\/2493"}],"wp:attachment":[{"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/media?parent=2492"}],"wp:term":[{"taxonomy":"activity_subject","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_subject?post=2492"},{"taxonomy":"academic_year","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/academic_year?post=2492"},{"taxonomy":"complexity","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/complexity?post=2492"},{"taxonomy":"content_tags","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/content_tags?post=2492"},{"taxonomy":"activity_type","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_type?post=2492"},{"taxonomy":"activity_duration","embeddable":true,"href":"https:\/\/fairconditioning.org\/fc-activity\/wp-json\/wp\/v2\/activity_duration?post=2492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}