×

Energy use monitoring system

  • US 4,509,679 A
  • Filed: 05/16/1983
  • Issued: 04/09/1985
  • Est. Priority Date: 05/16/1983
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a central heating system for a multiple unit building including a central heater, heating fluid delivery and return lines between the heater and each unit, a control valve for each unit in those lines and a motor driven pump connected to circulate fluid from the heater in those lines, the improvement comprising single digital flow measuring means connected to measure the aggregate flow of heating fluid in those lines to at least several of those units, digital temperature measuring means connected to measure the temperature of the heating fluid leaving the heater, separate digital temperature measuring means connected to measure the fluid temperature in each measured unit heating fluid return line, means for signalling the open or closed state of each measured unit control valve, and a digital microprocessor connected with the single digital flow measuring means, each measured unit digital temperature measuring means and each measured unit valve signalling means, arranged to measure the change in heating fluid flow when a control valve is opened or closed, the temperature differences at short regular time intervals between the heating fluid leaving the heater and the fluid in the heating fluid return line measured unit when its control valve is opened, and to multiply said changes in flow in each measured unit by said temperature differences for that unit.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×