Renovated cooling at PIMU
Abstract
An electronic temperature control system for the cool water circuit at the PIMU section is described. The system consists of a temperature reader, control, offset and switch print, a programmable logic circuit (plc) and a motor speed control unit for the ventilators. From 21 to 6 C, with every 1.4 C temperature increase an extra cooling unit is switched on up to 30 C; every unit is switched off 1.4 C lower than its switching on temperature. Switching on a unit, an air value is opened and a ventilator starts on 10% of its maximum power and is regulated with the temperature increase within the 1.4 C step.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- April 1985
- Bibcode:
- 1985STIN...8610452D
- Keywords:
-
- Electronic Control;
- Liquid Cooling;
- Temperature Control;
- Logic Circuits;
- Switching Circuits;
- Valves;
- Electronics and Electrical Engineering