US 7,350,365 B2Granted

Method for controlling cogeneration system

AssigneeLG Electronics Inc.

InventorsCheol Min Kim, Cheol Soo Ko, Sim Bok Ha, Baik Young Chung

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Abstract

A method for controlling a cogeneration system is disclosed. The control method determines whether or not the operation load or power load of an air conditioner corresponds to a load requiring driving of a generator, controls the generator to operate when it is determined that the operation load of the air conditioner corresponds to the generator driving load, controls the air conditioner to operate using electric power generated from the generator when the generator operates normally, and controls the air conditioner to operate using commercial electric power when the operation load of the air conditioner is not the generator driving load or when the generator operates abnormally. Accordingly, there are advantages in terms of economy and safety.

Claims20

Dependent claims

A method for controlling a cogeneration system, comprising:

a first step of receiving an operation ON signal for an air conditioner;
a second step of, following the first step, determining whether or not a power load of the air conditioner corresponds to a generator driving load requiring driving of a generator;
a third step of, if it is determined at the second step that the power load corresponds to the generator driving load, rotating a radiating fan, switching a flow rate control valve to a radiating mode, driving a heat medium circulation pump, and driving a drive source adapted to drive the generator;
a fourth step of, following the third step, checking an electric power generation state of the generator;
a fifth step of, if it is determined at the fourth step that the generator operates normally, switching electric power supplied to the air conditioner from commercial electric power to electric power generated from the generator;
and
a sixth step of, following the fifth step, operating the air conditioner.

4 more elements

A method for controlling a cogeneration system, comprising:

a first step of receiving a cooling operation ON signal for an air conditioner;
a second step of, following the first step, switching a refrigerant path established in the air conditioner to allow a refrigerant in the air conditioner to be circulated through a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger, and switching a flow rate control valve to a radiating mode;
a third step of driving a heat medium circulation pump, rotating a radiating fan, and driving a drive source adapted to drive the generator;
a fourth step of, following the third step, checking an electric power generation state of the generator;
a fifth step of, if it is determined at the fourth step that the generator operates normally, switching electric power supplied to the air conditioner from commercial electric power to electric power generated from the generator;
and
a sixth step of, following the fifth step, operating the air conditioner in a cooling mode.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/250,395Filed 17 Oct 2005
Priority: KR 10-2004-010554514 Dec 2004
Published: US 2006/0123818 A115 Jun 2006
Granted: 1 Apr 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F25B 27/02
Machines, plants or systems, using particular sources of energy: using waste heat, e.g. from internal-combustion engines
F25B 13/00
Compression machines, plants or systems, with reversible cycle
Y02A 30/274
Relating to heating, ventilation or air conditioning [HVAC] technologies: using waste energy, e.g. from internal combustion engine
Y02E 20/14
Combustion technologies with mitigation potential: combined heat and power generation [CHP]