The invention relates to an
energy storage and
heat pump combined large-temperature-difference
cold storage and heat storage
system. The
energy storage and
heat pump combined large-temperature-difference
cold storage and heat storage
system mainly comprises two cold / heat storage
water tanks, a cold / heat source supply device, a steam compression type
heat pump system, two circulating pipelines, a water return pipeline, a
water supply pipeline, stop valves, water mixing valves, flow
control valves and the like, wherein the stop valves, the water mixing valves, the flow
control valves and the like correspond to the pipelines. According to the
energy storage and heat pump combined large-temperature-difference
cold storage and heat storage system, the cold / heat storage
water tanks are utilizedto store cold / heat generated by the cold / heat source supply device during off-peak
electricity, and a large
temperature difference is kept between the cold / heat storage temperature and water suppliedto a user, so that the size of the cold / heat storage
water tanks is effectively reduced; when the system is used for supplying cold / hot water to the user, the cold / hot water output from the cold / hot
water storage tanks is mixed with a part of user return water, supplying to the user is carried out through a first
water supply pipeline; and in order to balance the cooling / heating load of the system, a steam compression type heat pump is arranged on a second
water supply pipeline and used for performing cooling and heating on the other part of the user return water, so that the requirement of the water supply working condition is met.