Problems
The use of an ATEG presents new problems to consider:
Since the exhaust has to flow through the ATEG’s heat exchanger, kinetic energy from the gas is lost, causing increased pumping losses. This is referred to as back pressure, which reduces the engine’s performance.
To make the ATEG’s efficiency more consistent, coolant is usually used on the cold-side heat exchanger rather than ambient air so that the temperature difference will be the same on both hot and cold days. This increases the radiator’s size since piping must be extended to the exhaust manifold. It also adds to the radiator’s load because there is more heat being transferred to the coolant.
ATEGs are made primarily of metal and, therefore, contribute a significant weight to the vehicle. An ATEG designed for small cars and trucks weighs about 125 lb (57 kg), while for large trucks and SUVs, it can contribute up to 250 lb (110 kg) to the vehicle. The added weight causes the engine to work harder, resulting in lower gas mileage.
Cost is a prevalent issue in ATEGs. Thermoelectric generators with higher efficiencies require higher quality, more expensive thermoelectric materials. With the thermal cycling and vibration of the vehicle, the generator’s longevity is a concern. Although high quality thermoelectric materials could produce more electricity, the cost of replacing them could outweigh the savings in fuel economy.
Read more about this topic: Automotive Thermoelectric Generator
Famous quotes containing the word problems:
“The proper method of philosophy consists in clearly conceiving the insoluble problems in all their insolubility and then in simply contemplating them, fixedly and tirelessly, year after year, without any hope, patiently waiting.”
—Simone Weil (1909–1943)
“I have a horror of people who speak about the beautiful. What is the beautiful? One must speak of problems in painting!”
—Pablo Picasso (1881–1973)
“I respect guilt. It is a dangerous but sometimes useful beast. The guilt that made me want to solve all my children’s problems meant trouble. The guilt that made me question my role in our mother-daughter squabbles proved helpful. Yes, I care about my kids’ problems, and I long to make suggestions. But these days I wait for children to ask for help, and I give it sparingly. Some things can’t be fixed, and I tell them so.”
—Susan Ferraro (20th century)