Double-regeneration heat pump cycle

Abstract

A double-regeneration heat pump cycle comprises a high-temperature absorber, a condenser, a first throttle valve, an evaporator, an absorber, a first solution pump, a first solution heat exchanger, a second solution pump, a fourth solution pump, a second solution heat exchanger, an ejector, a generator or regenerative generator or high pressure generator, a low pressure generator, a second throttle valve or fifth solution heat exchanger, a regenerative high pressure generator, a sixth solution heat exchanger, a regenerative low pressure generator, a third solution pump, and a third throttle valve. Each of the regenerative generator and the regenerative low pressure generator is provided with a coolant steam passage communicated with a jet inlet of the ejector. A jet heat pump and an absorbing heat pump are combined organically; heating temperature is increased; heat utilization is more efficient; high-quality drive steam can be efficiently utilized by different grades of drive heats; compression ratio is smaller, and ejecting coefficient is higher; compared with the traditional heating way, the double-regeneration heat pump cycle has excellent energy-saving efficiency.

Description

technical field [0001] The invention belongs to the technical field of low-temperature waste heat utilization. Background technique [0002] Absorption heat pumps use thermal energy as power, and use the reverse Carnot cycle to transfer heat from low temperature to high temperature. It is especially suitable for occasions with a large amount of waste heat. The condensed state of waste heat can be gaseous or liquid. For the absorption heat pump with lithium bromide aqueous solution as the working medium, due to the physical properties of the working medium itself, in order to ensure the safe and stable operation of the heat pump unit, there are certain requirements for the temperature and concentration of the solution. In order to make the absorption heat pump work in a reasonable To operate in temperature and concentration ranges and achieve the best working efficiency, people have developed multi-effect and multi-stage absorption heat pumps: under the same waste heat temper...

AI Technical Summary

Problems solved by technology

The low-pressure steam inhaled by the steam injection heat pump can be exhausted exhaust steam or flash steam generated by high-temperature condensed water. Since this type of heat pump can only recover steam, for low-temperature liquid waste heat, such as low-temperature hot water containing The heat cannot be recovered directly, which greatly limits its application fields.

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