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Laboratory HVAC Systems – 3 Energy Efficiency Improving Tips

Heating, ventilation and air conditioning (HVAC) and mechanical services expert, John Rush of Boulting Environmental Services explains three tips for improving the energy efficiency of HVAC systems in laboratories.  Cleanroom and laboratory design and construction are his area of specialization.

Source: https://commons.wikimedia.org/wiki/File:GoodMills_Bulgaria_Laboratory.JPG

Safety, comfort and energy efficiency are the core components of HVAC design for any new facility.  Laboratories in particular can benefit immensely from improvements to their HVAC systems that result in increased energy efficiency.

Laboratories contain large HVAC systems to control airflow and temperature, which means they consume a large amount of energy per square metre. By implementing good HVAC system design, the carbon footprint of a laboratory can be dramatically reduced.

Ventilation requirements of a typical commercial building office means that approximately 4 Air Changes per Hour (ACH) are acceptable. However, laboratories usually require 8 to 30 ACH… putting a higher demand on the HVAC system and requiring much more energy.

  • Reducing contaminant sources – lessens the required number of ACH.
  • Introduce Direct Digital Controls (DDC) –  Automatic occupancy controls can reduce the air change rates when there is reduced fume cupboard use, together with reduced overall flowrate during unoccupied periods, reducing energy usage of the HVAC system.
  • Consider energy recovery technology, such as plate heat exchangers or run around coils.  Low-pressure loss, high-efficiency heat exchanger design will improve the energy efficiency of the facility.
  • Reduce energy used by the extraction fan. …by using a variable stack orifice or multi-stack discharge.

 

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