Independent temperature and humidity processing air conditioning system driven by low-level thermal energy

Patent metadata

Field	Value
Publication number	US-10330331-B2
Application number	US-201615534354-A
Country	US
Kind code	B2
Filing date	May 25, 2016
Priority date	Nov 24, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

An independent temperature and humidity processing air conditioning system driven by low-level thermal energy, comprising an absorption-type refrigeration circulation loop, a solution dehumidification and regeneration circulation loop, a water cooling circulation loop, and a central air conditioning air supply and air return pipeline; the absorption-type refrigeration circulation loop comprises an evaporator ( 21 ), an absorber ( 26 ), a generator pump ( 25 ), a second solution heat exchanger ( 27 ), a generator ( 1 ), a condenser ( 2 ), a water-water heat exchanger ( 3 ), and a throttle valve ( 20 ); the solution dehumidification and regeneration circulation loop comprises a regenerator ( 8 ), a first solution pump ( 9 ), a solution heater ( 10 ), a first solution heat exchanger ( 12 ), a second solution pump ( 16 ), a solution cooler ( 17 ), and a dehumidifier ( 18 ); the water cooling circulation loop comprises two branches; and the central air conditioning air supply and a return pipeline comprises an air supply pipeline ( 13 ), an air return pipeline ( 14 ), an air conditioning heat exchanger ( 15 ), a dehumidifier ( 18 ), an evaporator ( 21 ), an air supply induction opening ( 23 ), an air return induction opening ( 22 ), a second flow guide fan ( 11 ), and a regenerator ( 8 ). The present air-conditioning system can resolve the problem of efficiently driving absorption-type cooling for air conditioning adjustment under 80° C.

First claim

The invention claimed is:

1. A low-grade heat driven temperature and humidity separately processed air-conditioning system, comprising:
an absorption refrigeration circulation loop that comprises; an evaporator that absorbs heat from air supplied in an air supply pipeline to turn a refrigerant water into refrigerant vapor,
an absorber containing concentrated LiCl solution that receives the refrigerant vapor which forms a diluted LiCl solution,
a generation pump that pumps the diluted LiCl solution from the absorber,
a second solution heat exchanger that receives the diluted LiCl solution from the generation pump,
a generator in which the diluted LiCl solution is heated to form water vapor and concentrated LiCl,
a condenser that receives the water vapor from the generator and cools it to form a refrigerant water,
a water-water heat exchanger that receives the refrigerant water,
a throttle valve that receives the refrigerant water from the water-water heat exchanger where it is throttled into the evaporator,
a solution dehumidification-regeneration circulation loop that comprises:
a dehumidifier containing a desiccant solution through which a supplied air from an air supply pipeline passes to dehumidify the supplied air and dilute the desiccant solution;
a second solution pump that pumps the diluted desiccant solution from the dehumidifier;
a first solution heat exchanger that receives the diluted desiccant solution from the second solution pump;
a solution heater that receives the diluted desiccant solution from the first solution heat exchanger, where it is heated;
a regenerator that receives the diluted desiccant solution from the solution heater and air from the air return pipeline, whereby the diluted desiccant solution becomes concentrated by the air,
a first solution pump that pumps the concentrated desiccant solution from the regenerator to the first solution heat exchanger, where sensible heat is exchanged with the diluted desiccant solution passing through the first solution pump,
a solution cooler that receives and cools the concentrated desiccant solution from the first solution pump and passes the cooled concentrated desiccant solution to the dehumidifier, and
a cooling water circulation loop comprising:
a cooling tower that produces cool water,
a first valve through which cool water enters a first branch and a second valve through which cool water enters a second branch,
the first branch comprising an absorber that receives the cool water and passes the cool water to the condenser where the water vapor in the condenser condenses and merges with water in the water-water heat exchanger;
the second branch comprising the solution cooler that receives cool water to cool the concentrated desiccant solution received from the regenerator:
a water pump that pumps the cool water from the solution cooler to water-water exchanger to exchange sensible heat with the refrigerant water therein and then merges with the water from the condenser and flows back to the cooling tower; and
a central air conditioning air supply and return pipelines comprising:
the air supply pipeline that receives fresh air;
an air heat exchanger through which fresh air passes and is cooled before passing through the dehumidifier and the evaporator through a supplied air induction port into an area to be air conditioned;
an air return pipeline through which air is removed through a return air induction port from the area to be air conditioned, so that the returned air passes back through the air heat exchanger, and
a second guide fan that directs the returned air, as it leaves the air heat exchanger, towards the regenerator, where the return air concentrates the LiCl solution in the regenerator.

2. The low-grade heat driven temperature and humidity separately processed air-conditioning system according to claim 1 , wherein, the first branch of the cooling water circulation loop and the second branch of the cooling water circulation loop are operably connected to said cooling tower; the first branch and the absorption refrigeration circulation loop are operably connected to said condenser; the first branch and the absorption refrigeration circulation loop are operably connected to said absorber; the second branch and the solution dehumidification-regeneration circulation loop are operably connected to said solution cooler; the second branch and the absorption refrigeration circulation loop are operably connected to said water-water heat exchanger.

3. The low-grade heat driven temperature and humidity separately processed air-conditioning system according to claim 2 , wherein, the central air conditioning air supply and return pipelines and the solution dehumidification-regeneration circulation loop are operably connected to said dehumidifier; the central air conditioning air supply and return pipelines and the absorption refrigeration circulation loop are operably connected to said evaporator; the central air conditioning air supply and return pipelines and the solution dehumidification-regeneration circulation loop are operably connected to said regenerator.

4. The low-grade heat driven temperature and humidity separately processed air-conditioning system according to claim 1 , wherein, the generator in the absorption refrigeration circulation loop is driven by low-grade heat energy at 80° C. or a lower temperature; the working evaporation temperature of the evaporator ranges from 12° C. to 18° C.; the low-grade heat source for heating the solution entering into the regenerator in the solution dehumidification-regeneration circulation loop and the low-grade heat source in the absorption refrigeration circulation loop have the same source.

Assignees

• Univ Southeast

Inventors

• Yin Yonggao
• Dong Yaming
• Zhang Xiaosong

Classifications

• F25B29/006

  of the sorption type system · CPC title

• F25B27/00

  Machines, plants or systems, using particular sources of energy (F25B30/06 takes precedence) · CPC title

• Y02B30/62

  Absorption based systems · CPC title

• F25B15/06

  the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide {(F25B15/025 takes precedence)} · CPC title

• F25B25/005

  using primary and secondary systems · CPC title