Cambio Climático yUso de Energía

(Ds-1005)

Class Projects 1

“Earth-making of a planet” from National Geographic• https://www.youtube.com/watch?v=RQm6N60bneo

Use of the Psychrometric Chart

• The Psychrometric Chart graphically represents the steam tables for moisture in air at conditions we encounter in HVAC work.

Project 1 – Energy Use at Home

• Energy concept• Energy is the capacity of matter that makes possible the changes taking place

in the same matter; the variation of free energy of a substance results in a job that is measured in the same units as energy.

• The energy can not be created but only converted.

• The unit of energy in the International System is the Joule (Btu for Inches-Pound System).

• 1 joule = 1 Newton * meter = 1 kg * meter2 / second2

Project 1 – Energy Use at Home• Other units and their equivalents:

• Kilojoule (KJ) = 103 joules• Megajoule (MJ) = 106 joules• Gigajoule (GJ) = 109 joules• Terajoule (TJ) = 1012 joules• Electron-volt (ev) = 1.6 x 10-19 joules• Calorie (cal) = 4.1868 joules• Kilocalorie (Kcal) = 4.1868 x 103 joules• Watthour (Wh) = 3.6 x 103 joules• Kilowatt-hour (KWh) = 3.6 x 106 = 103 Wh• Megawatt-hour (MWh) = 3.6 x 109 joules = 106 Wh• Gigawatt-hour (GWh) = 3.6 x 1012 joules = 109 Wh• Terawatt-hour (TWh) = 3.6 x 1015 joules = 1012 Wh• 1 Btu (Bristish Thermal Unit) = 1055.06 J• 1 Btu = 0.252 Kcal

Project 1 – Energy Use at Home

• Mexican fuels:• Crude oil• Dry natural gas (84% CH4)• Gas L.P. (Liquid Propane)• Gasoline• Kerosene and Jet fuel• Diesel• Fuel oil• Coal

Project 1 – Energy Use at Home

• Power is Energy per unit of time (P=E/t)• Joules/seconds = Watts• Btu/hour

• The capacity of the equipment is measure in units of power• kW, MW, etc.• Btu/h, Tons of air conditioning (1 Ton = 12,000 Btu/h)

• The energy used by a light bulb of 100 Watts during 10 hours is:• E = P*t =(100 W)*(10 h) = 1,000 Wh = 1 kWh

0-6

http://www.calculadora.cre.gob.mx/

2015

2016

http://www.aguadehermosillo.gob.mx/inicio/index.php/accesos/calcula-tu-consumo

Project 1 – Energy Use at Home1. Take a measure of the electric energy meter each day for 7 days (kWh)

• Calculate the difference every day and make a note of why you consume more or less.• Subtract from the last day the first day and divide that amount between 7 to calculate the

average daily.• Multiply the average daily for 30 days to calculate the monthly use of energy• Compare this amount with the amount of energy used last year (from the last year bill)

2. Calculate the energy used by each devise in your home• (Watts)(hours of use/month)/(1000) = kWh/month• Compare this amount with the calculated from the energy meter

3. Calculate the amount of water used• Take the measure of the water meter (m3) and take it again 7 days later• Calculate the difference between both amounts and divide that by 7 to calculate the average

daily• Multiply the average daily for 30 to calculate the monthly use of water.

The greenhouse gas demo

• 2 plastic bottle (2 litters)• 2 Alka Seltzer• 1 Incandescent lamp• 2 bottle caps• 2 thermometers

The greenhouse gas demo

Composting

• Build a compost bin

• Bring material for the compost bin

What to Compost, What Not to Compost

• Vegetable plants soak up the materials that make up your compost, and these materials will play a vital role in the development of the vegetables that will grace your dinner table! When in doubt as to what should or shouldn’t go into your compost pile for your garden, follow these general guidelines:

What to Compost, What Not to Compost

• Great Garden Compost• “Clean” food scraps – including

crushed eggshells, corncobs, vegetable scraps, oatmeal, stale bread, etc.

• Vegetable and fruit peelings and leftovers

• Coffee grounds and filters, tea leaves are tea bags

• Old potting soil• Lawn clippings• Prunings from your yard, chopped up

in small pieces

• Not for Compost, Please• Fatty or greasy food scraps – including

meat waste, bones, grease, dairy products, cooking oil, dressings, sandwich spreads, etc.

• Fruit pits and seeds – these don´t break down well and can attract rodents

• Diseased plant material• Weeds – these will only sprout in

your garden! Kill the weed seeds and salvage the compostable bits by baking or microwaving the plants before adding them to your compost bin.

What to Compost, What Not to Compost

• Great Garden Compost• Shredded leaves and pine needles• Shredded newspaper and telephone

books – black and White pages only• White or Brown paper towels and

napkins• Wood ash – use sparingly• Cardboard• Livestock manure• Sawdust, wood chips, and woody

brush• Straw or hay, the greener the better!• Wilted floral bouquets

• Not for Compost, Please• Any plant debris or plants that are

diseased or full of insect pests• Glossy color ads or wax-coated book

covers• Colored paper towels and napkins• Coal ash• Pizza boxes or other wax-coated food

boxes• Cat, dog, or other pet waste, which

may contain meat products or parasites

• Sawdust from Wood treated with preservatives

Group 01 (AD16)Team 1 Team 2 Team 3

Team 4 Team 5 Team 6

Group 01 (AD16)Team 9Team 7

Group 02 (AD16)Team 1 Team 2 Team 3

Team 4 Team 5 Team 6

Group 02 (AD16)Team 9

Team 11

Team 8

Team 10

Team 7

Solar Food Dryer

• Build a Solar Food Dryer

• Bring food to dry

Group 01 (AD16)Team 1 Team 2

Team 3 Team 4

Group 01 (AD16)Team 5 Team 6

Team 9Team 7

Group 02 (AD16)Team 1 Team 2

Team 3 Team 4

Group 02 (AD16)Team 5 Team 6

Team 7 Team 8

Group 02 (AD16)Team 9

Team 11

Team 10

Solar Water Distiller

• Build a Solar Water Distiller

Group 01 (AD16)Team 1 Team 2 Team 3

Team 4 Team 5 Team 6

Group 01 (AD16)Team 7 Team 9

Group 02 (AD16)Team 1 Team 2 Team 3

Team 4 Team 5 Team 6

Group 02 (AD16)Team 7 Team 9

Team 11Team 10

Team 8