Control circuit for solar energy heating systems

Patent · Tue Jan 08 04:00:00 EST 1980

OSTI ID:5641803

Williams, T R

A control circuit for a solar energy heating system comprising a pair of thermistors connected in series across a source of electrical power and respectively disposed to be responsive to fluid temperature in a solar collector and in a storage tank. A negative feedback high frequency oscillator which includes a Schmitt trigger is connected to the junction of the thermistors and provides a high frequency control signal having an amplitude which varies as a function of the temperature differential between the collector and tank. An electronic switch energizes a fluid pump for transporting fluid from the solar collector to the tank when the temperature at the collector exceeds that at the tank by a preselected amount.

• Assignee: EDB-82-094074
• Patent Number(s): US 4182309
• OSTI ID: 5641803
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
CONTAINERS
CONTROL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
HEATING SYSTEMS
MULTIVIBRATORS
OSCILLATORS
PULSE CIRCUITS
PUMPS
SEMICONDUCTOR DEVICES
SIGNALS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
TANKS
TEMPERATURE MEASUREMENT
THERMAL ENERGY STORAGE EQUIPMENT
THERMISTORS