The invention discloses a refrigerating
system and method based on secondary condensation pressurization absorption and
supercooling compression. A heat collector is sequentially connected with a first hot water pump and a heat
storage tank; the heat
storage tank is sequentially connected with a second hot water pump and a generator; the generator is sequentially connected with an absorption circulating condenser, an absorption circulating
throttle valve, an absorption circulating
evaporator, a secondary condenser, a
booster pump, an absorber, a solution pump, a solution
heat exchanger and a solution
throttle valve; a main-stage circulating compressor is sequentially connected with a condenser, a subcooler, a main-stage
throttle valve and a main-stage
evaporator; a secondary circulating compressor is sequentially connected with the condenser, the subcooler, a secondary throttle valve and a secondary
evaporator; a
cold storage tank is sequentially connected with an absorption circulating
chilled water pump and an absorption circulating evaporator; and the
cold storage tank is sequentially connected with a
supercooling pump and the subcooler. According to the
system, secondary condensation and the
booster pump are combined to replace a large
water vapor compressor to achieve pressurization absorption, and therefore, a heat source working condition range is widened, and the low-temperature heat source working condition performance of the
system is remarkably improved.