by John A. Herbert
energy efficiency matters, seven million died needlessly in 2012 a result of air pollution (BBC/WHO) and considering the smog in China this year, that figure will surely increase. That figure for me is staggering,particularly when we know that energy efficiency is the fastest, most benign strategy to reduce your fuel use, lower energy costs and prevent pollution. Many of the solutions need only your effort, not huge amounts of capital. Smart organisations have designated person to deal with energy matters every day, sadly many don’t.
Turning off the exterior lighting during the day is another obvious win, the outside lighting in this hotel was operating 24 hours per day, even during a sunny day, during the green building conference!
Another case, electricity must be too cheap, in the photo above, this company leaves the shop front lighting on day and night although the shop is closed, the lights continue to burn. As you know, every watt counts because 100 units of fuel are burnt to give 10 units of work, those huge losses result from generation, heat rejection, continuous conversion (no storage), spinning reserves, kilometres of transmission losses, and transformer losses.
Operating the air conditioning installation efficiently saves money and prevents pollution! I have identified and corrected countless systems operating poorly at part load, hunting, and cycling causing extra expenses! Also, the central chiller plant was found operating 24/7 even the building was unoccupied at night and weekends, there are countless success stories.
Science 101 – warm air rises so air conditioning controllers pinned to the underside of the suspended ceiling do not experience the same actual condition as the people in the occupied zone! Little wonder the occupants wear jackets and feel too cold.
In the photo above, we have heaters (lighting fittings) fitted underneath the air conditioning return air sensors, this causes the control system to over cool the the space. To lower costs and improve comfort only condition the ‘occupied zone’, the suspended ceiling zone can be 30 deg C when the occupants are comfortable with 23 deg C. There is no point to condition the whole space (control the whole space) when we only occupy the zone nearest the floor. Put the sensors in the occupied area, we don’t need to keep the ceiling cool, we need to keep the occupants comfortable.
You have a choice!