Showing posts with label energy. Show all posts
Showing posts with label energy. Show all posts

Saturday, 24 December 2022

Some Christmas Reading

Pat Swords has written a new book, available to download from the link here :

Feedback from: Pat Swords (europa.eu) 

Having lived and worked in many places that have been in the headlines in recent times such as Ukraine, Sweden and Libya, Pat is in a unique position to explain events that have unfolded in recent times.  

"Colonel John Boyd of the United States Air Force (USAF), who as a jet fighter pilot in Korean and Vietnam eras, had also a standing bet as an instructor pilot, that beginning from a position of disadvantage in air combat manoeuvring, in less than 40 seconds, he could defeat any opposing pilot. He also invented the OODA loop, which is not as one would expect, about twisting a fighter aircraft into some contortionist position, but rather stands for a strategy of ‘Observe – Orient – Decide – Act’. Namely, prior to making a decision (the decide phase), the person will first have to get information (observe) and determine what it means to him and what he can do about it (orient). Which in turn leads to the good summary of, fail to ‘observe’ (get the information), prepare to fail. Jim Glennon, who served seven years in the Oireachtas as a TD (Member of the Irish Parliament) and Senator before retiring in 2007, wrote in the Irish Times on the 1 April 2010: 


“Most voters are, somewhat naively, of the view that government policy is developed through a process of careful analysis, comprehensive consultation, and the selection and prioritisation of initiatives based on impact and thorough cost-benefit analysis. In reality, most government policy-making is based on an ad-hoc reaction to events / media-pressure, and driven by the responsible Minister’s particular requirement to be seen to announce something which seems at least semi-sensible.  Regrettably, policy-making which is focused solely on addressing tactical issues inevitably leads to strategic mistakes. Many of the problems now being faced by the Government are the result of ad-hoc fixes of problems during the boom – got a problem, create an agency, buy-off the unions, get it off the front page”. 


You would think that they would learn from this and put in a more effective strategy, such as a few OODA loops.


As hindsight is not foresight, there are always decisions with results, which don’t match the prior hypothesis. However, does that mean we should hand over our decision-making to those designated for us as ‘experts’, particular so when it is us, who rightly or wrongly, bear the consequences? This is a very fundamental question. For example, there was quite a mess left behind the Iron Curtain by the planned economy, even though its superiority was taught and eulogised by the local economic professors, before they themselves saw the light and re-educated themselves, when the wall fell down. Making people clean up the mess they leave behind is always difficult, because it seems nobody is responsible, as all are responsible, even though it was only nobody and his buddies, who got to make the decisions, Hence, the conclusion of the ‘five whys’ analysis, was that pretty strong checks and balances must be put in place, to control nobody and his buddies, by all the rest. Which in legal terms led to the adoption of the UNECE Aarhus Convention on the premise that the environment is important and does not belong to the State, but to the people, and as political ideologies come and go, the people must be provided with robust procedural rights in relation to environmental decision-making".

Thursday, 16 April 2015

The difference between Power and Energy

Image result for man on treadmill cartoon
Energy
Power




                                                     
Power and energy are two words that are thrown around a lot in the debate on energy. Val Martin of EPAW helps explain the difference between the two :

There is a huge difference between energy and power as Robert Bryce pointed out in his book on the subject, “Power Hungry”.    There are three sources of energy on Earth, Solar from the sun to grow plants stored over millions of years as fossil fuel, tidal from the gravitational influences of the moon on sea water and nuclear from the fact that E = mc2. There are non quantifiable sources of energy, falling leaves, horses, people, rain water, wind, explosives and lightening to name a few. There is a misconception that energy is power. While the sun and nitrate in fertiliser is required to provide the energy to grow plants, the feebleness of sunlight and the intensity of Nitrate explosives make it difficult to use it to provide power homes, transport or electricity. The electricity grid needs a constant reliable source to provide the power to drive cookers, electric power tools, welders etc. Likewise a loaded lorry going up a hill needs a very intense source of energy carried with it. Lightening is very intensive, but incapable of conversion.


Let's say a retired couple have a family saloon petrol car. Government introduces a law that the engines must be removed and replaced by a horse connected to it and controlled by reins through holes in the wind screen. Say the horse = 1 horse power (hp) and the car = 12 HP and the car is required for 2 hours a day, then theoretically the daily energy potential of the horse is 24hp (24 x 1) which is enough to power the car. The problem is that the horse is restricted to an average speed of 7 mph, he will only move 24hrs x 7mph = 168 miles in one day. The car can move 24hrs x 50mph = 1,200 miles. On a steep hill the horse may fail. Moreover the travel times for the couple will greatly increase and there may be no heating or lighting system, not to count rest times for the horse. The misconception with wind energy is to count the total potential output over one year as the actual useful output. 


A test of any energy source is if it can work on its own, independent of other sources. If it cannot, the likelihood is that it is a passenger on the system. There is no agreed scientific way to measure the contribution of wind energy on the grid.