When a man returns to his well-sealed house on a summer day, he finds that the house is at 35°c. he turns on the air conditioner, which cools the entire house to 20°c in 38 min. if the cop of the air-conditioning system is 2.8, determine the power drawn by the air conditioner. assume the entire mass within the house is equivalent to 800 kg of air for which cv = 0.72 kj/kg·°c and cp = 1.0 kj/kg·°c.

Explanation:

Given:

ΔT

So the power the air conditioner do first determine the heat that removed

Now that heat in the time the air take to remove the heat

Finally that power drawn can be find by the power and the COP is knowing

no simpler subs form complex ones. synthesise = make

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

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