METHOD AND SYSTEM FOR POSITIVE EVACUATION OF SOLAR COLLECTOR

摘要

A method and system for positive evacuation of water from a solar collector using a bypass line which diverts a portion of water from the feed line of the solar collector to an inlet of a water pump. When the solar water heating circuit is turned off, suction created by the filtration pump rapidly evacuates all or substantially all water present in the solar collector. The system should include a water level switch on the feed line to the solar collector, a drain valve that allows pool water to evacuate from the solar collector and associated piping when water is present, a control mechanism that relays information from the water level switch to the drain valve, a small drain line that connects the solar pool heater feed and return lines to a water pump inlet, and a check valve to prevent by-pass.

主权项

1. A method for positive evacuation of water from a solar collector, comprising
i) pumping water from a swimming pool through a feed line to a solar collector and back through a return line to said swimming pool during operation of said solar collector; ii) diverting a portion of pumped water from said feed line so that it bypasses said solar collector and is returned to an inlet of a water pump during operation of said solar collector, thereby creating a bypass flow from said feed line to said water pump; iii) terminating operation of said solar collector by closing a water inlet to said feed liner; and iv) positively evacuating water from said solar collector using suction created by said water pump and said bypass flow until substantially all water has been removed from said solar collector.