A heat Dump is a single electric system that both heats and cools. In summer,a heat pump Is a conventional air conditioner which removes heat from a building. In winter,the system reverses itself,If to use the natural heat that is always present in outdoor air. By taking advantage of the free heat,a heat pump is more economical to operate in winter than a system using electric resistance heat.Electric resistance heat uses electricity as a raw material to create heat where no heat existed before.Heat pump,on the other hand,uses electricity to move existing heat from where it already exists naturally(outdoors) to where it is wanted(indoors).
Heat energy will naturally flow from greater concentration to areas of lesser concentration.That is what happens when hot food grows cool.The heat from the food flows into the air in the room until the food stabilizes at room temperature.Blowing air over substance will speed up the process,which is why a winter day will seem cold when there is a strong wind than when the air is still.
A heat pump uses this heat transfer process to move heat which is always in the air.The outdoor coil is made colder than the outdoors air.A fan blows outdoor air across the coil where heat is absorbed by the refrigerant.The refrigerant is then compressed and moved to the indoor coil and the heat is distributed in the building.
During the summer,a heat pump reverses this process.The indoor coil is made cooler than the indoor air,and so room heat flows into the refrigerant which is compressed and moved to the outdoor coil.The outdoor coil,which is hotter than the outdoor air、will 10se heat energy.
“It hurts me more than you,”and“This is for your own good.”These are the statement my mother used to make years ago when I had to learn Latin,clean my room,stay home and do homework.
That was before we entered the permissive period in education in which we decided it was a right not to push our children to achieve their best in school The school and the educators made it easy on us.They taught that it was all right to be parents who take a let—alone policy.We stopped making our children do homework.We gave them calculators,turned on the television,left the teaching to the teachers and went on vacation.
Now teachers,faced with children who have been developing at their own pace for me past 15 years,are realizing we’ve made a terrible mistake.One such teacher is Sharon Klompus who says of her students“So passive”and wonders what happened.Nothing was demanded of them,she believes.Television,says Klompus,contributes to children’S passivity.“We’re not training kids to work any more”says Klompus.“We’re talking about a generation of kids who’ve never been hurt or hungry.They have learned somebody will always do it for them.Instead of saying“go look it up”,you tell them the answer.It takes greater energy to say no to a kid.
Yes,it does.It takes energy and it takes work.It’s time for parents to end their vacation and come back to work.It’s time to take the car away,to turn the TV off, to tell them it hurts you more than them but it’s for their own good.It’s time to start telling them no again.