There are many heat sources located outside of an engine. One of these sources is the sun in the sky.
False
The energy source in a steam engine is the heat source that converts water into steam thus creating pressure. The heat source itself can be a coal, wood, gas or petroleum burner but can also be something different like a solar panel or a nuclear reactor (most nuclear reactors are themselves steam engines-generators).
is it possible to construt a heat engine that will not expel heat into the atmosphere
EM (or emergency heat) can be used if you have a problem with your other heat source such as a heat pump. In most cases, you will not need this but what it does is bi-passes the primary heat source and allows your secondary heat source (normally your furnace) to become the primary.
The steam engine helped to power the Industrial Revolution. Before steam power, most factories and mills were powered by water, wind, horse, or man. Water was a good source of power, but factories had to be located near a river.
External combustion engine is the answer you're looking for.
Friction
A car engine is a heat engine, but there are various types of heat engines outside the realm of car and truck engines.
False
on the top
A heat engine can never be 100% efficient due to the second law of thermodynamics, which states that some heat energy will always be lost to the surroundings. The temperature required for maximum efficiency is the temperature of the heat source for the engine. The efficiency of a heat engine is determined by the temperature difference between the heat source and the environment.
False (APEX)
Increasing the temperature of the heat source is the most effective way to improve the efficiency of a heat engine.
On a Hyundai Santa Fe, the starter is located on the top of the engine. The engine is located next to the heat pump.
By using a heat source to boil water.
As a "heat engine", a car engine must rid itself of heat to continue. Efficiency of the heat engine depends on the difference in temperature; therefore, as the temperature outside reaches the temperature inside, the engine stops.
A combustion engine powered by fossil fuels is a common source of heat and power. It generates energy by burning fuel to produce heat, which is then converted into mechanical power.