Absorption chiller-heater
View Patent ↗There is constructed a constitution including an exhaust heat fired regenerator constituting a heat source by exhaust heat from external machine generating the exhaust heat, a heat fluid flow path for making a fluid having the exhaust heat constituting the heat source or a fluid recovering the exhaust heat flow to the exhaust heat fired regenerator, flow path open/close device provided at the heat fluid flow path for controlling to make the heat fluid flow to the exhaust heat fired regenerator 1 and cut off the fluid therefrom by opening and closing the exhaust fluid flow path, first regenerator temperature detector for detecting temperature of the exhaust heat fired regenerator, a directly fired regenerator constituting a heat source by combustion heat of a burner, second regenerator temperature detector for detecting temperature of the directly fired regenerator, heat medium temperature detector for detecting temperature of a heat medium cooled or heated by an evaporator and controller for controlling to operate the flow path open/close device and the burner, in which a combustion amount of the burner can be increased and reduced and the controller controls to open and close the flow path open/close device and increase and reduce the combustion amount of the burner in accordance with the temperature of the heat medium detected by the heat medium temperature detector and a higher one of temperature of the temperature of the exhaust heat fired regenerator detected by the first regenerator temperature detector and the temperature of the directly fired regenerator detected by the second regenerator temperature detector.
1. An absorption chiller-heater comprising:
a first regenerator heated by exhaust heat;
a heat fluid flow path in which a heat fluid heated by the exhaust heat flows, supplying the exhaust heat to said first regenerator;
a flow path control device provided on said heat fluid flow path for opening and closing the heat fluid flow path, thereby switching the heat fluid to flow or to be cut off to said first regenerator;
a second regenerator heated by combustion heat;
a burner having a variable combustion amount, supplying the combustion heat to said second regenerator;
a first temperature detector for detecting a temperature of said first regenerator or said second regenerator;
a cooling medium temperature detector for detecting a temperature of a cooling medium supplied to an absorber, wherein said controller changes values of the regenerator set temperatures in accordance with the temperature of the cooling medium detected by said cooling medium temperature detector;
a heat medium temperature detector for detecting a temperature of a heat medium output from an evaporator; and
a controller for controlling operation of said flow path control device and said burner;
wherein said controller sets the temperature detected by said first regenerator temperature detector to be a regenerator temperature, and
said controller controls at least one of operations to open and close said flow path control device and to increase and reduce the combustion amount of said burner in accordance with the temperature of the heat medium detected by said heat medium temperature detector and the regenerator temperature.
2. The absorption chiller-heater according to claim 1 , wherein said first regenerator temperature detector detects a temperature of said first regenerator and a second regenerator temperature detector detects a temperature of said second regenerator,
said controller sets a higher one of either temperatures of said first and second regenerators to be the regenerator temperature, and
said controller controls at least one of operations to open and close said flow path control device and to increase and reduce the combustion amount of said burner in accordance with the temperature of the heat medium detected by said heat medium temperature detector and the regenerator temperature.
3. The absorption chiller-heater according to claim 1 , wherein the combustion amount of said burner is variable in steps by a plurality of stages,
said controller determines to open or close said flow path control device and the combustion amount of said burner based on a plurality of heat medium set temperatures and the temperature of the heat medium and,
said controller subsequently increases and reduces in steps the combustion amount of said burner based on a plurality of regenerator set temperatures and the regenerator temperature, whereby a heat input amount to the second regenerator is increased and reduced.
4. The absorption chiller-heater according to claim 1 , wherein the combustion amount of said burner is continuously variable, and
said controller determines to open and close said flow path control device and stop to combust or combust said burner based on a plurality of heat medium set temperatures and the temperature of the heat medium, wherein when said burner is combusted, said controller subsequently determines in steps a maximum combustion limit based on a plurality of regenerator set temperature and the regenerator temperature, the maximum combustion limit setting a range of the combustion amount in which the combustion amount is varied in a proportional manner with the temperature of the heat medium, whereby a heat input to said second regenerator is increased and reduced.