Utilization of solar systems to harvest atmospheric moisture for various applications including panel cleaning

Patent metadata

Field	Value
Publication number	US-11303244-B2
Application number	US-202016775829-A
Country	US
Kind code	B2
Filing date	Jan 29, 2020
Priority date	Jan 29, 2020
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A solar collection system includes an absorption refrigeration system to generate water from atmospheric moisture, and to do so without the use of an electrically operated compressor. At least a portion of the solar energy captured by the solar collection system is used to operate the absorption refrigeration cycle. The absorption refrigeration cycle provides cooling that causes water in the atmosphere to condense into a liquid that can be collected and used for various applications. As one example, the collected liquid can be used for the cleaning of the solar collection system of contaminants like dust or bird drippings. In other applications, the water can be used outside the solar collection system including, but not limited to, irrigation, drinking, and other industrial purposes.

First claim

What is claimed is:

1. A system for condensing atmospheric moisture free of an electrical compressor, comprising:
a solar collector having a first surface exposed to solar energy and a second surface opposite the first surface;
an absorber, the absorber containing a working fluid that includes a solution of a coolant fluid and an absorption fluid;
a generator fluidly connected to the absorber for receiving the solution from the absorber, the generator being supported by the solar collector such that at least a portion of the solar energy can be absorbed by the solution to separate the coolant fluid from the absorption fluid, wherein the generator is fluidly connected to the absorber to return the absorption fluid to the absorber;
a condenser fluidly connected to the generator to receive the coolant fluid;
an evaporator fluidly connected to the condenser to receive the coolant fluid, the evaporator being supported adjacent the second surface of the solar collector and arranged such that the coolant fluid can affect a heat transfer to lower the temperature of the solar collector and is further capable of causing atmospheric water to condense on the solar collector;
wherein the absorber is fluidly connected to the evaporator to receive the coolant fluid, the absorber providing a chamber in which the coolant fluid and absorption fluid can combine to reform the working fluid solution; and
a water collector disposed at a lower end of the solar collector, the water collector configured to collect water that travels across the surface of the solar collector by gravity.

2. The system of claim 1 , wherein coolant fluid is ammonia and the absorber fluid is water.

3. The system of claim 1 , further including a nozzle and a filter fluidly disposed between the water collector and the nozzle to remove dirt in the water.

4. The system of claim 1 , further including a storage tank fluidly disposed downstream of the water collector.

5. The system of claim 1 , further including a pump fluidly disposed between the absorber and the generator to transfer the solution from the absorber to the generator.

6. The system of claim 1 , further including a throttle fluidly disposed between the condenser and the evaporator.

7. A solar energy collection system that includes a system for generating water using an absorption refrigeration cycle in lieu of an electrical compressor, wherein the generated water can be used for cleaning the solar energy collection system and for other purposes, comprising:
a solar collector having a first surface exposed to solar energy and a second surface opposite the first surface;
an absorber, the absorber containing a working fluid that includes a solution of a coolant fluid and an absorption fluid;
a generator fluidly connected to the absorber for receiving the solution from the absorber, the generator being supported by the solar collector such that at least a portion of the solar energy can be absorbed by the solution to separate the coolant fluid from the absorption fluid, wherein the generator is fluidly connected to the absorber to return the absorption fluid to the absorber;
a condenser fluidly connected to the generator to receive the coolant fluid;
an evaporator fluidly connected to the condenser to receive the coolant fluid, the evaporator being supported adjacent the second surface of the solar collector and arranged such that the coolant fluid can affect a heat transfer to lower the temperature of the solar collector and is further capable of causing atmospheric water to condense on the solar collector;
wherein the absorber is fluidly connected to the evaporator to receive the coolant fluid, the absorber providing a chamber in which the coolant fluid and absorption fluid can combine to reform the working fluid solution; and
a cleaning system, comprising;
a water collector disposed at a lower end of the solar collector, the water collector being capable of collecting water that can travel across the surface of the solar collector; and
a nozzle disposed at an upper end of the solar collector, the nozzle being fluidly connected to the water collector, the nozzle being capable of spraying at least a portion of the water collected by the water collector on the first surface of the solar collector to clean the first surface of the solar collector, while further portions of the water collected remain available for the same cleaning operation or for other applications,

wherein the solar collector can include one or more condensation panels which define fins configured to be chilled by the coolant fluid.

8. The system of claim 7 , wherein coolant fluid is ammonia and the absorber fluid is water.

9. The system of claim 7 , further including a filter fluidly disposed between the water collector and the nozzle to remove dirt in the water.

10. The system of claim 7 , further including a storage tank fluidly disposed between the water collector and the nozzle to provide storage of the water between cleaning operations.

11. The system of claim 7 , further including a pump fluidly disposed between the absorber and the generator to transfer the solution from the absorber to the generator.

12. The system of claim 7 , further including a throttle fluidly disposed between the condenser and the evaporator.

13. A method for cleaning a solar energy collection system that includes generating water using an absorption refrigeration cycle, comprising:
generating water on a first surface of a solar collector by operation of a refrigeration system, the first surface being exposed to solar energy, and the solar collector having a second surface opposite the first surface;
operating the refrigeration system, comprising the steps of:
transferring a working fluid that includes a solution of a coolant fluid and an absorption fluid from an absorber to a generator fluidly connected to the absorber, the generator being supported by the solar collector such that at least a portion of the solar energy can be absorbed by the solution,
separating the coolant fluid from the absorption fluid as a result of absorption of at least the solar energy, wherein the generator is separately fluidly connected to the absorber and a condenser,
returning the separated absorption fluid to the absorber;
transferring the separated coolant fluid to the condenser wherein the separated coolant fluid condenses;
transferring the condensed coolant fluid to an evaporator fluidly connected to the condenser, the evaporator being supported adjacent the second surface of the solar collector and arranged such that the coolant fluid can affect a heat transfer to lower the temperature of the solar collector;
causing water to condense out of the atmosphere and onto the first surface of the solar collector as a result of heat transfer between the coolant fluid in the evaporator and the solar collector;
returning the coolant fluid to the absorber, wherein the absorber is fluidly connected to the evaporator to receive the coolant fluid, the absorber providing a chamber in which the coolant fluid and absorption fluid can combine to reform the working fluid solution; and

cleaning the first surface of the solar collector by allowing the condensed water to traverse the first surface of the solar collector as a result of gravity acting on the condensed water.

14. The method of claim 13 , further including the steps of:
collecting the condensed water after it traverses the surface of the solar collector using a water collector disposed at a lower end of the solar collector; and
spraying at least a portion of the water collected by the water collector on the first surface of t

Assignees

• Saudi Arabian Oil Co

Inventors

• Khayyat Ahmad W
• Fadhel Bandar A
• Saggaf Ahmed M
• Hammad Ahmad D

Classifications

• F24S40/20 Primary

  Cleaning; Removing snow · CPC title

• H02S40/44

  Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time (directly associated with the PV cell or integrated with the PV cell H10F77/67) · CPC title

• E03B3/28

  from humid air (condensing of vapours in general B01D5/00; dehumidification of air for air-conditioning F24F3/14) · CPC title

• H02S40/10 Primary

  Cleaning arrangements · CPC title

• H02S40/425

  using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation · CPC title