A combination of a heat engine driving a heat pump (see Fig. P7.106) takes waste energy at 50°C as a source Qw1 to the heat engine rejecting heat at 30°C. The remainder Qw2 goes into the heat pump that delivers a QH at 150°C. If the total waste energy is 5 MW find the rate of energy delivered at the high temperature.

1.08 MW

Explanation:

Given that:

Heat supplied to heat engine

= 5 MW

Temperature of the hot source of engine

= 323 K

Temperature of the cold source of engine

= 303 K

the temperature and heat relation for a reversible heat engine can be presented as follows:

= 4.69 MW

TO determine the work done by the heat engine ; we have:

The temperature and heat relation for the reversible heat pump can be written as:

kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.