mending things

Common themes across most of my posts are energy conservation , its monitoring and technology. This post sort of combines all three in one. We have a Sky+ satellite unit with integral hard disk recorder. In the UK this is known as a Sky+ box. The unit can be programmed to easily record programmes 24 hours per day and record complete series at a repeating time. It has lots of features, including OnDemand  services where a wide range of channels are recorded on the off chance you might want to watch them. My specific Model Sky + HD unit is made by Amstrad We also have a 46" Samsung LED TV which is hooked up to the Sky+ unit . I use a CurrentCost household energy monitor, which is hooked up to the internet via a unit called a netsmart, also from CurrentCost (see my other post on currentcost). I can see on a web page a graph of my household energy consumption in close to real time. A 3rd type of device from CurrentCost is the Individual Alliance Monitor (IAM) which is a unit whi...

I have been monitoring my electricity consumptions for a number of years on the basis that, in order to reduce it, i need to understand it first, i.e. where does it all go ? Initially I took a reading from the meter once a week , then subtracted the past reading from the current reading to get the weekly usage. I did this in a spreadsheet. Now I use The imeasure which is a web site run by Oxford University. It does this and many more things, including gas consumption and factoring in weather conditions. I also monitor my real  time using a current cost device, monitoring the whole house, plus a couple of individual appliance monitors (IAM) which provide me data about individual appliances. I can publish this data to the Internet via the current cost NetSmart unit. All these methods give me a better idea of what I'm using and where it's going. I should explain that my household uses gas central heating as the primary source of heat and hot water. My weekly electricity usage...

Inspired by the success of my bridged energy monitor which enables me to publish to and access data from the web, I decided to also get an IAM. CurrentCost is a household energy monitor, which uses wireless technology to communicate with an inductive 'clamp' installed around the mains electricity cable in my meter box (see other currentCost post). Recently the bridge enables the display to post data to the web. The IAM is a small unit resembling an electrical plug with a socket on the back. Basically you unplug a piece of equipment in your house, plug it into the IAM and plug the IAM into the wall socket. What it does is enable you to monitor individual appliances in your household using the CurrentCost display, in addition to the whole household. My Display supports up to 9 IAMs in addition to the primary function of displaying the total household consumption. I've always been a bit mystified as to why my background usage never falls much below 300 watts. Even while...

I just got a 'bridge' for my current Cost CC128 device enabling me to publish data to dashboard etc. Early days but here is my currentusage Works well, and meant that I could monitor my household energy use from abroad while on holiday ! The currentcost dashboard at my.currentcost.com has a mobile browser version which worked on my Android phone.

Well the trusty old Dell Dimension 2350 is still going strong. I decided to replace the power supply with a more efficient one. If you've read my earlier Dell post you will know that the original Dell PSU started to fail some years ago and was replaced with a gold Sweex Brand 400 watt supply, which has worked well. I decided to replace the Sweex with a 400Watt AKASA AK-P040FG8 which is 80plus rated . This means it is more energy efficient. The Sweex was fine, but I didn't really do much research when I bought it, and I had another project in need of the Sweex , so it seemed like a good idea to upgrade the one in the Dell to a more energy efficient design. My Son had also seen the occasional lock up of the PC while running games and iTunes simultaneously, and I thought this might be due to PSU demand. However before replacing it I wanted to do some tests of standing and peak power consumption of the PC with both the Sweex and Akasa power supplies. I plugged the PC into an en...

I know more than I want to about these light bulbs. While the UK Government is waging war on the 100 watt incandescent light bulb, they have, typically, ignored the growing trend of using these bulbs. I guess they pay people to change bulbs for them. We had our house gutted and rebuilt in 2000, and as a consequence had around 40 recessed lights fitted, each of which take the GU10 mains voltage (240v) GU10 light bulbs. At first, the main issue was that the halogen bulbs had a very short life span and cost a lot to buy, around £5. I seemed to be changing a couple a week. Things have improved and now the bulbs are relatively cheap ( £1-£2) and have a fairly long life expectancy. So what is my gripe ? Well these bulbs are rated at a hefty 35 or 50 watts. The packaging even implies that they are energy saving in some way, but of course watts are watts. i If you have 5 * 50 watts halogen bulbs in your kitchen, then you are using a unit every 4 hours they are on. If I turn on all th...

I am on an Economy 7 electricity tariff. E7 , as it's abbreviated, offers lower cost electricity at night, but with slightly higher day rate and standing charge. The original reason for E7 was so the Electricity providers to reduce the peak demand. In very general terms, the electricity we are using now is being generated now. This means that the grid has to anticipate peak demand, fro example the ad break in the middle of "Coronation Street" , when millions of viewers get up and switch electric kettles on. By encouraging people to use electricity during off-peak times i.e at night, less generators have to be bought online. Also the mix of generators determines the amount of CO2. For live CO2 data from the grid see http://realtimecarbon.org/ You can see that the mount of CO2 released in grams per unit is at it's lowest at night. Also lowering peak demand means less power stations needing to be built The biggest household use of electricity is heating water and space ...

My latest gadget, which I have had for a few months is the Current Cost CC128 . This device displays how much electricity we use , in real time. It also gathers historical data which I can download to a computer for analysis. There are quite a number of these type of devices from Owl, Wattson and others and they all work in broadly the same manner. The device has a display unit , as seen in the picture. It communicates with a sensor which you install alongside your electricity meter via a wireless connection. The sensor unit has a clamp which loosely attaches around the cable leaving your electricity meter. That's it ! Takes about 2 minutes to install and does not require an electrician. Nor does it interfere with your electrical supply or wiring in any way. Completely non invasive. I had previously had an Owl device which worked very well, but did not record historical data. I passed this unit on to my mother-in-law who is using it in France, where it also works well. I chose the...