Temperature control system for solar cell module

Patent metadata

Field	Value
Publication number	US-9847440-B2
Application number	US-201414327311-A
Country	US
Kind code	B2
Filing date	Jul 9, 2014
Priority date	Jul 23, 2013
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

An aspect of present invention is to provide a temperature control system for a solar cell module, capable of controlling a solar cell module to maintain a proper temperature, the temperature control system comprises: a temperature sensor configured to measure a temperature of the solar cell module; a fluid tube having therein a path along which a temperature controlling fluid flows; a pump configured to supply a temperature controlling fluid which flows along the fluid tube; and an inverter configured to drive the pump such that the temperature controlling fluid is supplied, if the current temperature of the solar cell module is not lower than the pre-stored first pump driving reference temperature, or if the current temperature of the solar cell module is not higher than the pre-stored second pump driving reference temperature.

First claim

What is claimed is:

1. A temperature control system for a solar cell module, the system comprising:
a temperature sensor installed at the module, the temperature sensor configured to measure a temperature of the module;
a fluid tube installed to contact a rear surface of the module, the fluid tube including a path via which temperature controlling fluid flows;
a pump connected to the fluid tube, the pump configured to supply the temperature controlling fluid to the rear surface of the module via the fluid tube; and
an inverter connected to the module and electrically connected to the temperature sensor and the pump, the inverter configured to:
convert direct current provided from the module into an alternating current;
compare a current measured temperature of the module to a pre-stored first reference temperature and a pre-stored second reference temperature; and
control the pump to supply the temperature controlling fluid to lower the temperature of the module if the current measured temperature is not lower than the pre-stored first reference temperature and to control the pump to supply the temperature controlling fluid to raise the temperature of the module if the current measured temperature is not higher than the pre-stored second reference temperature.

2. The system of claim 1 , further comprising a fan electrically connected to the inverter and configured to provide cooling air current,
wherein the inverter is further configured to control the fan to provide the cooling air current when the current measured temperature is not lower than the pre-stored first reference temperature.

3. The system of claim 2 , wherein the fan is positioned to provide the cooling air current toward a portion of the fluid tube via which the temperature controlling fluid returns to the pump in order to lower the temperature of the temperature controlling fluid.

4. The system of claim 2 , wherein the fan is positioned to provide the cooling air current toward the module in order to directly lower the temperature of the module.

5. The system of claim 2 , wherein the cooling fan is positioned to provide the cooling air current toward the fluid tube in order to indirectly lower the temperature of the module.

6. The system of claim 1 , wherein:
the temperature controlling fluid is a cooling fluid when the current measured temperature is not lower than the pre-stored first reference temperature; and
the temperature controlling fluid is a heating fluid when the current measured temperature is not higher than the pre-stored second reference temperature.

7. The system of claim 6 , wherein the temperature controlling fluid is an anti-freezing solution.

8. The system of claim 1 , further comprising:
a fluid return tank connected to the pump and configured to collect the temperature controlling fluid that returns to the pump; and
a heater configured to heat the temperature controlling fluid collected by the fluid return tank,
wherein the inverter is further configured to control the heater to increase a temperature of the collected fluid and control the pump to supply the increased temperature fluid to the module if the current measured temperature is still not higher than the pre-stored second reference temperature.

9. The system of claim 1 , wherein the temperature sensor is a platinum resistance temperature detector, a thermistor, a thermocouple or a Resistor Temperature Detector.

10. The system of claim 1 , wherein the inverter is further configured to control the pump to no longer supply the temperature controlling fluid when the current measured temperature is lower than the pre-stored first reference temperature or higher than the pre-stored second reference temperature.

Assignees

• Lsis Co Ltd

Inventors

• Jang Sung Jin

Classifications

• G05D23/1919

  characterised by the type of controller · CPC title

• H02S40/425

  using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation · CPC title

• H02S50/00 Primary

  Monitoring or testing of PV systems, e.g. load balancing or fault identification · CPC title

• H02S20/32

  specially adapted for solar tracking · CPC title

• G05D7/0623

  characterised by the set value given to the control element · CPC title