mrsbrown: (Default)
When we design retail spaces we typically expect that the store will have a 20% occupancy, but that the lighting energy to the store will be designed to operate at 100% during opening hours.  Wouldn't it be good if we could better match the number of people in a supermarket to the energy being provided to keep the store open?

I imagine that going to the supermarket could be a bit like riding in the Ghost Train at Luna Park.  As you enter each section, it could light up. And you would have to wait until there are enough people to justify you starting the journey. 

Although maybe the realistic version of that is using smaller stores for each of the supermarket sections - butcher, dry goods, fruiterer, deli etc.  I wonder what's more energy efficient? The wholly lit supermarket behemoth, or multiple small stores that cover all of the stuff you buy at the supermarket?
mrsbrown: (Default)
In May I wrote about my household energy consumption and suggestions of the things I could do to reduce it.

I recently got my electricity bill.  Our average electricity usage in October last year was 19.9kWh.  This October, it is 13kWh. 

If we had installed PV cells on our roof, we might have generated 4.5kWh per day in the last 3 months, but we've actually saved more than that through turning off our computers and using laptops, turning off  mr-bassman's powered hub, and being more disciplined about turning off lights.

I think the thing to do to reduce our costs further is to replace our fridge.  Maybe I could fund it from the energy savings I've made - the equivalent of $84 this year.  That will take us about 20 years, hmmm.

mrsbrown: (Default)
I've written before about the ridiculous use of power in my home. According to my power bills we use 22kWh per day. My colleague, who has 2 adults and 2 children at home, has a consumption of 6kWh a day.

I have now measured most things in my home and I have found the following things:

My computer consumes 2W when it's off.
[livejournal.com profile] mr_bassman's computers and powered hub use 4.4kWh of our 22kWh a day. If he changes to a laptop with wireless (and gets rid of every other computer!) we will save about $270 a year.
I've been leaving my desktop PC running so it can be used as a server for files and printing. If I turn it off and use a portable hard drive instead I will save 1.5kWh. I can plug the printer into my laptop when I need it.
Computers and associated stuff account for about a third of my total electricity use.

My dishwasher appears to use twice as much energy as a modern one would. A new dishwasher will save me 1kWh a day
I have a 17year old fridge which was a 5 star fridge in its time. It now costs me 2.3kWh a day to run. A new fridge will save me about 1.5kWh a day and pay for itself in about 5 years.

Running random clocks in various equipment (VCR/DVD/microwave/stove etc) costs me almost another 1 kWh per day.

Running the fluoro lights in my kitchen and family room in winter accounts for nearly 2kWh, or half my lighting load. I think this winter will be better; since we painted the kitchen we don't need the light during the day.

We have an electric kettle which is operated about 10 times a day. That's another 1 kWh. I think we're buying a new, stove-top kettle. At about $15 that will pay back in about 3 months.

If I implemented all of these savings I could possibly get my consumption down to 12kWh.

Energy

Sep. 7th, 2008 11:33 am
mrsbrown: (big machine)
I once had to give a 5 minute talk about myself. It turned out that I am was all about rationing the things I do in my day, so that I have enough energy to make it to the end. Carefully planning whether I should catch a tram or walk somewhere depending on what I had planned for the evening.

Later in that personal development course I learnt that I could keep doing stuff even when I felt tired. I could even walk 14 hours a day and have enough energy to cook dinner for 7 over a campfire [1]

I know a bit more about myself and energy now:

If I exercise regularly I have more hours in my day to do stuff, 'cos I don't need to flop on the couch in the evenings.
If I have too many things on in a weekend I'm likely to get up one morning during the week and procrastinate leaving the house. Luckily I can now work at home on those days[2]
If I'm doing something exciting and challenging that fills my weekend, I'm surprised at how well I feel on Monday.
If the exciting and challenging project continues into the evenings of my working week, I can just keep going for about a fortnight, but I will collapse at the end and have trouble moving again for a few weeks.
I have physical and intellectual energy and, while one influences the other, they're not the same. So telling myself that I could walk for 14 hours and still do stuff necessary for my survival, isn't enough to keep me at work for 14 hours, even if I do have a deadline.
Hanging out with my friends frequently gives me the energy, that I didn't think I had, to do stuff afterwards.
Since being Baroness, I can do more than I thought I could and work on more projects than I thought I could. And I like the feeling I get when I move from one project to another, even though I'll get hijacked by my brain and stop.
Just keeping on going, and forgetting about how much energy I have, I get more done and I like it better.

and the kicker?

When I'm worrying about rationing my energy, I use it up and get less done.

To illustrate; yesterday I wandered around the Healesville Sanctuary and got home feeling like crap. I went out with my friends anyway and got home at 1.30am feeling better than I had when I left. This morning is my only free time, so I carefully slept in and then read some book 'cos it's my only opportunity this weekend. Now I'm writing this, 'cos lying in bed often loosens my muse and I like the achievement of letting it loose. I've been interrupted several times by the small child in my life and now I'm angsting about both finishing this and getting on with being sufficiently organised to have a reasonable time this arvo. Soon I'll do the Baroness stuff I want done so I can hold my chin up at Bash. I'll then spend the arvo at Bash where I'll put on my happy face and probably have a good time. It's time with friends and frequently energising, even if I'll get home and wish I'd spent more time at home this weekend. I've got someone coming home with me, but he'll only get an hour of my time, 'cos then I have to go and have dinner with my mum and sister. That will also be better than I anticipate and I'll probably get home feeling good. Until I realise that I have to work out what to wear to work tomorrow.

The whole time I'm doing all that, I'll be worrying that I should be having quiet time to store up for my work week, which includes 2 major projects, a bunch of interruptions I know I'll have, a new employee I'm responsible for and ongoing negotiations with the owners of the company I currently work for. There's no time to stay home on the couch this week. And I have a big weekend next weekend.

So, how much energy do I have available for all that? hmmm, maybe I should take it one thing at a time and enjoy as much of it as I can.

But how the f%^k am I going to get through next week?




[1]that's one pot with boiled pasta, milk powder, chicken seasoning and plastic cheese - not so much dinner as food.
[2] But probably not this week
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