Page - 67 - in Our Car as Power Plant

67 CAR-PARK POWER PLANT ENERGY SYSTEM When we realize an average sized car park with about 500 fuel cell cars with a capacity of 100 kW each, we have built a 50 MW power plant. Such a power plant is a very fl exible power plant: almost instantaneously the power output of this car-park power plant can be shut down or brought to full capacity. It is able to operate as a base-load, interme- diate-load or peak-load power plant. It can operate as spinning reserve, follow fast fl uctuations in demand or act as backup power. And it can switch gradually between full electricity- or water production. Let us have a look into the electricity-production system- effi ciency and compare the system effi ciency between our present system based mainly on large fossil fi red power plants and a system that basically consists of car-park power plants. The system effi ciency based on fossil fi red power plants, base-load, intermediate-load and peak-load plants together, is 40% in the Netherlands and much lower in most other countries. The system effi ciency based on car-park power plants has all the fl exibility to follow the demand and to deal with all kinds of disruptions.