Water Jacket - A heat exchanger element enclosed in a boiler. Water is circulated with a pump through the jacket where it picks up heat from the combustion chamber after which the heated water circulates to heat distribution devices. A water jacket is also an enclosed water-filled chamber in a tankless coiled water heater. When a faucet is turned on water flows into the water heater heat exchanger. The water in the chamber is heated and transfers heat to the cooler water in the heat exchanger and is sent through the hot water outlet to the appropriate faucet.
Water has a more stable seasonal temperature than air thus making for a more efficient heat source.
Primarily used to power an electric generator. Water Wall - An interior wall made of water filled containers for absorbing and storing solar energy. Watt - The rate of energy transfer equivalent to one ampere under an electrical pressure of one volt. Wattmeter - A device for measuring power consumption. Wave Form - The shape of the phase power at a certain frequency and amplitude.