Sunday, February 26, 2023

Heating of EVs

Range[edit]

Electric vehicles may have shorter range compared to vehicles with internal combustion engines,[113][114] which is why large electric ships generally cannot cross oceans as of 2021.[115] A new range of EV safari vehicles is slated to come out in 2023 which will have a range of 500km, roughly 310 miles, which will be a bigger range compared to fuel safari vehicles.[116]

Heating of EVs[edit]

In cold climates, considerable energy is needed to heat the interior of a vehicle and to defrost the windows. With internal combustion engines, this heat already exists as waste combustion heat diverted from the engine cooling circuit. This process offsets the greenhouse gases' external costs. If this is done with battery EVs, the interior heating requires extra energy from the vehicles' batteries. Although some heat could be harvested from the motor or motors and battery, their greater efficiency means there is not as much waste heat available as from a combustion engine.

However, for vehicles which are connected to the grid, battery EVs can be preheated, or cooled, with little or no need for battery energy, especially for short trips.

Newer designs are focused on using super-insulated cabins which can heat the vehicle using the body heat of the passengers. This is not enough, however, in colder climates as a driver delivers only about 100 W of heating power. A heat pump system, capable of cooling the cabin during summer and heating it during winter, is a more efficient way of heating and cooling EVs.[117]

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