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regardless what kind of power plant is needed (either nuclear or anything else), I agree with salvia, that energy efficiency is important, but will not be enough to supply our needs.
understanding from few articles that I read, that our energy demand will doubled in 2020, while as the energy efficiency that was proposed by some manufactured by today is only able to save energy by 20-30% max.
so yes, efficiency is greatly needed, but the answer of providing a safe and sufficient powerplant is also need to be implemented.
its different in every energy meters, starting on 2%,1%, or even 0.5 and 0.1
which was being used is mostly depends on the utility on each countries itself.
true, by definition is both the same, only in the usage between mostly american and british uses a different wording..
yap sort off.. few engineer likes to describe as a beer glass.. where active power is the beer itself, while the reactive power is the bubble.. its there, but not really sufficient to energize your load, where active power needed the most..
payback period of energy management system (EMS)?
i think for energy management system itself, its pretty hard to measure the payback period. but, after we installed EMS, we can then apply many things and installed many other devices (inverter, energy saving light, sensor) that can lead to energy efficiency that we can measure the payback period.
correct me if i’m wrong
1. the existing meters only give me a global information
what kind of global information is it? by kwh for electrical? liter for fuel? m3 for air? etc?
2. to MAKE my information more detailed and reliable
the easiest part and part that i know is for electrical, install a meter that can monitor your system with a communication to a computer/simple software to compile the data
3. FIND ways to analyze my consumption to see if there is space for reduction
point number 2 will help you analyze
4. whether they are normal?
in hotel engineering, if i’m not mistaken, correct me if i’m wrong, you will have benchmark obtain from any other hotel engineer, for example:
Large Hotel : > 150 Rooms
< 165 kWh/m2 per year
< 600 Ltr/Guest staying over night
Medium Hotel : 50 – 150 Rooms
< 70 kWh/m2 per year
< 440 Ltr/Guest staying over night
Small Hotel : 4 – 50 Rooms
< 60 kWh/ m2 per year
< 330 Ltr/Guest staying over night
Again if I’m not mistaken, in hotel, the energy usage is a bit different, not only compared the electrical use, but also between the meter square, and the number of guest. you can use low energy at the time only small guest, but it doesnt mean you have save anything. vice versa, in holiday season, your electrical use will increase, but it doesnt mean your system is bad as well.
5. And in this new era of energy savings, could we share our personal experiences, before calling in the specialists (like installers, energy savings consultants …)
you can started by benchmarking your month to month usage comparation, usually in winter you can cut cost for air cond, but also increase some heater cost, you can maintain by reducing temperature degree, some research show if you could reduce air cond usage of 1 degree, you can save few kwh, which human cannot feel the different to those 1 degree change.
