Energy-saving device for domestic water heaters

Patent · Tue Apr 08 04:00:00 EST 1980

OSTI ID:5773731

Kalmanoviz, D

An energy saving device for use in connection with a heat insulated storage vessel in a domestic hot-water system is disclosed. When there is no demand for hot water, water contained in the vessel is heated in an electric through-flow heater and circulated by gravity, with the heated water rising into the vessel through an outflow pipe of the vessel and the water to be heated being supplied to the heater from the lower portion of the vessel through a jet pump, a vortex diode and a valve which are connected in series between the through-flow heater and a water inlet pipe to the vessel. As soon as a hot water faucet is opened , water from a supply enters the jet pump, and the jet pump causes water to flow through the water inlet pipe into the lower portion of the vessel. At the same time water of medium temperature from the upper portion of the vessel flows through the heater and is brought to high temperature before flowing to the faucet. The device may be used with a solar system, in which case the water stored in the storage vessel may be additionally heated by a solar heat collector.

• Assignee: Energal Ltd (Israel)
• Patent Number(s): US 4197446
• OSTI ID: 5773731
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140907 -- Solar Thermal Utilization-- Water Heating
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320101* -- Energy Conservation
Consumption
& Utilization-- Residential Buildings-- (-1987)
APPLIANCES
CIRCULATING SYSTEMS
CONTROL EQUIPMENT
EFFICIENCY
ELECTRIC HEATING
ENERGY EFFICIENCY
EQUIPMENT
FLOW REGULATORS
HEATERS
HEATING
HOT WATER
HYDROGEN COMPOUNDS
NOZZLES
OXYGEN COMPOUNDS
PUMPS
SOLAR COLLECTORS
SOLAR EQUIPMENT
SOLAR WATER HEATERS
STORAGE
THERMAL INSULATION
VALVES
WATER
WATER HEATERS