# US 12,224,704 B2 · Heat recovery system

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- Number: US 12,224,704 B2
- Document ID: US12224704B2
- Status: Granted
- Kind: B2
- Application number: 17/751,305
- Filed: 2022-05-23
- Published: 2022-11-24
- Granted: 2025-02-11
- Earliest claimed: 2021-05-24
- Assignees: Enertopia Corp.
- Applicants: Enertopia Corp.
- Inventors: Barry Richard Brooks; Albert Clark Rich; Mark E. Snyder
- Web page: https://patentgrep.com/patent/US12224704B2

## CPC

- H02S 40/425: {using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation}
- H02S 40/44: 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)
- Y02E 10/50: Photovoltaic [PV] energy
- Y02E 10/60: Thermal-PV hybrids
- H02S: GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES (obtaining electrical energy from radioactive sources G21H1/12; light sensitive inorganic semiconductor devices H10F; light sensitive organic semiconductor devices H10K30/00; thermoelectric devices H10N10/00; pyroelectric devices H10N15/00)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A waste heat recovery system for a photovoltaic panel may include an open loop system and a closed loop system. The open loop system includes an electric insulator layer and a moisture collection layer. The moisture collection layer may collect moisture from condensation and to direct moisture away from the photovoltaic panel. The closed loop system may be positioned adjacent to the open loop system. The closed loop system may include a liquid transfer mat that has a plurality of tubes through which a liquid passes to absorb heat from the photovoltaic panel. The open loop system is configured to encourage heat transfer from the photovoltaic panel to the closed loop system.

## Claims

### Claim 1

A heat recovery system for a photovoltaic panel, the system comprising:
an open loop system comprising a first side positioned adjacent to the photovoltaic panel, wherein the first side comprises a surface configured to contiguously contact a corresponding surface on the photovoltaic panel, the open loop system further comprising:
an electric insulator layer spanning a length and a width of the open loop system and in contiguous contact with the corresponding surface of the photovoltaic panel, wherein the electric insulator layer comprises a flame retardant material; and
a moisture collection layer having a first side adjacent to and in contiguous contact with the electric insulator layer and a second side adjacent to and in contiguous contact with a closed loop system, wherein the moisture collection layer comprises a material of one or more of a metal, a metallic mesh, an aluminum mesh, an aluminum material, a mineral wool material, an open cell dense foam, or a porous reticulated foam, the material comprising a plurality of surfaces for the collection of moisture, the moisture collection layer configured to collect moisture, and transfer heat from the photovoltaic panel and to direct moisture away from the photovoltaic panel,
wherein the electric insulator layer is positioned between the corresponding surface of the photovoltaic panel and the moisture collection layer and is further configured to reduce the photovoltaic panel contacting the moisture collected by the moisture collection layer; and
the closed loop system positioned adjacent to the open loop system at a second side of the open loop system opposite to the first side of the open loop system, the closed loop system comprising:
a liquid transfer mat comprising a plurality of tubes through which a liquid passes to absorb heat generated by the photovoltaic panel;
wherein the open loop system is configured to facilitate heat transfer from the photovoltaic panel to the closed loop system to reduce a temperature of the photovoltaic panel.

### Claim 2 (depends on 1)

The system of claim 1, wherein the electric insulator layer comprises a thermoplastic membrane.

### Claim 3 (depends on 1)

The system of claim 1, further comprising the photovoltaic panel, wherein the open loop system is positioned between the closed loop system and the photovoltaic panel.

### Claim 4 (depends on 3)

The system of claim 3, wherein the photovoltaic panel comprises a first side configured to absorb solar energy; and a second side opposite the first side; wherein the open loop system is configured to contact the second side of the photovoltaic panel.

### Claim 5 (depends on 1)

The system of claim 1, wherein the moisture collection layer is a heat transfer layer.

### Claim 6 (depends on 1)

The system of claim 1, further comprising a drip system.

### Claim 7 (depends on 6)

The system of claim 6, wherein the drip system is a low volume water drip line.

### Claim 8 (depends on 6)

The system of claim 6, wherein the drip system is coupled to the moisture collection layer; and wherein the drip system is configured to allow remove the absorbed moisture to passively flow from the moisture collection layer.

### Claim 9 (depends on 8)

The system of claim 8, wherein the drip system is at least partially embedded within the moisture collection layer.

### Claim 10 (depends on 6)

The system of claim 6, wherein the drip system comprises a nozzle configured to allow the absorbed moisture to flow from the moisture collection layer.

### Claim 11 (depends on 10)

The system of claim 10, wherein the nozzle is positioned inset relative to an outer end of the electric insulator layer.

### Claim 12 (depends on 1)

The system of claim 1, wherein the liquid transfer mat comprises a flexible material and/or a rigid material.

### Claim 13 (depends on 1)

The system of claim 1, further comprising a backing layer.

### Claim 14 (depends on 13)

The system of claim 13, wherein the backing layer comprises an insulation material having a low thermal conductivity value, wherein the insulation material limits heat from escaping the liquid transfer mat.

### Claim 15 (depends on 13)

The system of claim 13, wherein the backing layer is configured to support the liquid transfer mat.

### Claim 16 (depends on 13)

The system of claim 13, wherein the backing layer is configured to support the closed loop system.

### Claim 17 (depends on 16)

The system of claim 16, wherein the backing layer is further configured to support the open loop system.

### Claim 18 (depends on 1)

The system of claim 1, wherein the liquid transfer mat is configured to absorb heat from the photovoltaic panel evenly across a surface of the photovoltaic panel.

### Claim 19 (depends on 12)

The system of claim 12, wherein the liquid transfer mat comprises a plurality of tubes positioned adjacent to each other and flexibly coupled to each other.

### Claim 20 (depends on 19)

The system of claim 19, wherein the plurality of tubes contact at least one other tube along a parallel length.

### Claim 21 (depends on 6)

The system of claim 6, wherein the drip system is configured to introduce water to the moisture collection layer, wherein the introduced water is configured to facilitate heat exchange from the photovoltaic panel.

### Claim 22 (depends on 1)

The system of claim 1, wherein the moisture collection layer material substantial fills an area between the insulator layer and the closed loop system.

### Claim 23 (depends on 1)

The system of claim 1, wherein the moisture collection layer comprises a foam.

### Claim 24 (depends on 22)

The system of claim 22, wherein the foam comprises an open cell foam.

### Claim 25 (depends on 1)

The system of claim 1, wherein the moisture collection layer comprises a thickness between about 0.5 to 0.6 inches and the moisture collection layer continuously spans a corresponding surface of the photovoltaic panel.

### Claim 26

A heat recovery system for a photovoltaic panel, the system comprising:
an electric insulator layer configured to electrically insulate the photovoltaic panel, the electric insulator layer spanning a length and a width of the photovoltaic panel and in contiguous contact with a corresponding surface of the photovoltaic panel, wherein the electric insulator layer further comprises a flame retardant, and wherein the electric insulator insulates the photovoltaic panel from moisture collected by a moisture collection layer;
the moisture collection layer comprising a first side positioned adjacent to the electric insulator layer, the moisture collection layer further comprising a plurality of surfaces configured for the collection of moisture, wherein the moisture collection layer is composed of an open cell material configured to absorb moisture; and
a closed-loop liquid transfer layer comprising a plurality of tubes through which a liquid passes, the closed-loop liquid transfer layer positioned adjacent to a second side of the moisture collection layer;
wherein the moisture collection layer is configured to improve heat transfer from the photovoltaic panel to the closed-loop liquid transfer layer.