Wednesday, September 7, 2011

What is the red stack number for Stuff in Hong Kong?

Hong Kong has an enormous market for stuff. The four chunks of stuff (RPUD) need to be broken up. First the raw materials are made before anything else is done (R). Next, the raw materials are processed and changed into a certain product (P). The final products will generally require energy to operate throughout the product life (U). And finally the product will need disposed of some day in some way (D). Making and producing the various components of a product involve a lot of time, resources, and energy. When done with a drink container, many people choose to throw the item away instead of recycling. If each person throws only 2 containers out each day the energy value is equivalent to just over 1 kWh per day per person. Since we are living in the age of technology we can assume that if you have a computer you will buy a new one every four years. Since so much energy goes into the production of a computer, the red stack number comes out to 1.25 kWh per day per person. Newspapers, magazines, and junk mail are a huge part of the energy component in the “stuff” department. Since there are so many newspaper that circulate on a regular basis, we can assume that wasted energy through paper waste alone is about 2 kWh per day per person. We will guess that the density of the households is higher in Hong Kong than in most countries with about 4 people per house. From McKay’s book we can say that the estimated energy cost of a house is 2.2 kWh per day. The average energy consumed on housing comes out to be about 0.5 kWh per day per person. There aren’t near as many automobiles in Hong Kong as in New York City (per person) because people generally don’t need to travel as far on a regular basis. For the roads and cars, compared to other sources, we can assume a small impact and assign a value of 1 kWh per day per person. Totaling everything up for “stuff” we get a sum of about 7 kWh per day per person.