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    Building Energy Efficiecny

    As we know buildings in Hong Kong account for a significant amount of energy consumption. According to Hong Kong's Electrical and Mechanical Service Department's (EMSD) study, over 90% of electricity is consumed by buildings.

    In 2012, the Hong Kong SAR government enacted the Building Energy Efficiency Ordinance (BEEO) to enhance building energy efficiency and reduce greenhouse gas emissions. We have prepared some references on the concept of energy saving and how to achieve those goals:


    Example of energy saving using inverter control
    • As the speed of the fan or pump is reduced, the flow will reduce proportionally, while the power required by the fan or the pump will reduce with the cube of the speed. This level of potential energy saving makes the use of Variable Speed Drive (VSD) a cost-effective investments in energy efficiency which can be considered for motors.



    • [Energy saving effect and amount of CO2 reduction by inverter drive]
      - Capacity of fan, pump: 30kW
      - Control speed by inverters: 60%

      * Efficiency of fan, pump at 100% operation: 92%

      * Necessary power of damper control: (60% speed = 84% power)
          30kW / 0.92 x 0.84 x 24h x 365days = 239,948kWh

      * Necessary power of inverter control: (60% speed = 21% power)
          30kW / 0.92 x 0.21 x 24h x 365days = 59,987kWh

      * Energy saving effect
          239,948?- 59,987 = 179,961kWh

      * Amount of CO2 reduction
          0.555kg / kWh x 179,961kWh = 99,878kg/year

    Application samples
    Toshiba Inverter Supporting the social infrastructure systems and industrial systems.


    Energy Savings Estimator Program
    • Try using this software program to estimate the electrical engeryfor fan and pump applications when using an AC motor in combination with an inverter drive. The software compares the use of an inverter drive against conventional control methods such as outlet dampers, inlet vanes, throttling valves, etc.... and instantly see the benefits.
      Download

     

     

     

    © 2019 Sunnice Supplies Co., Ltd all rights reserved.

  • 上海明确市级机关培训费标准 院士讲课费半天不超3000元 2019-07-24
  • 端午假期国内游客超8900万人次 全域旅游见成效 2019-07-22
  • 戴斌:旅游开发需更多文化自信 2019-07-22
  • 安徽省推动十九大精神在基层落地生根 2019-07-21
  • 穗青少年三棋锦标赛下月举行 2019-07-21
  • 返老还童?99岁老人白发里重新长出黑发 2019-07-13
  • 广州市增城区人民法院公告专栏 2019-07-13
  • 重判梁天琦法官遭网络暴力 港司法机构:已转律政司跟进 2019-06-30
  • 就因为“阶级亲”,才应把这些难民送到欧洲。欧洲生活水平高呀,让亲人生活的更好。不能让他们到中国受苦受难呀。 2019-06-28
  • 把握和传承好“变则通”思想(大家手笔) 2019-06-28
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  • 看到101的Yamy 终于知道单眼皮怎么化眼妆了 2019-06-24
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