Solar-powered adsorption chiller operable in the absence of sunlight

Patent metadata

Field	Value
Publication number	US-11421920-B2
Application number	US-201916394539-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Apr 25, 2019
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

A solar-powered two-bed adsorption chiller which can operate after sunset when the solar radiation intensity becomes zero. Rechargeable solar-powered batteries (SPBs) are connected to a flat-plate solar collector (FPSC). The photoelectric charges are directed from FPSC to a solar charge controller (SCC) which acts as a charge amplifier thus magnifying the total charge before it is finally collected inside the SPB for future use. The SPB is in turn connected to a resistance heating wire (RHW) which is immersed inside the HWST.

First claim

The invention claimed is:

1. A solar-powered adsorption chiller system operable in the absence of sunlight, comprising:
a solar heating mechanism and a solar powered resistance heating mechanism coupled for use in an adsorption chiller application;
a first circuit having a solar charge controller (SCC) to amplify the photoelectric charges originating from a flat-plate solar collector (FPSC), wherein the SCC magnifies the total charge before it is finally stored inside one or more solar powered battery (SPB) during the daytime; and
a second circuit having a resistance heating wire (RHW) electrically connected to the one or more SPBs, wherein the RHW is immersed in a hot water storage tank (HWST) to heat water stored inside the hot water storage tank, and wherein the RHW uses the solar energy stored in the one or more SPBs to heat the water stored inside the HWST following sunset;
wherein the first circuit includes a first switch and the second circuit includes a second switch, wherein each switch allows the respective circuit be switched ON or OFF; and
wherein an integrated controller is configured to selectively and automatically control the first switch and the second switch for smooth coupling/de-coupling of the first circuit and the second circuit.

2. The solar-powered adsorption chiller system of claim 1 , wherein the second circuit further incorporates a variable resistor (VR) and an ammeter to control the current flowing from the SPBs to the RHW so as to vary the temperature of water stored inside the HWST.

3. The solar-powered adsorption chiller system of claim 1 , wherein the first circuit is an FPSC-SCC-SPB circuit connecting the FPSC to the SCC and to the SPB, and wherein the second circuit is a SPB-VR-RHW circuit, connecting the one or more SPBs to the VR and to the RHW.

4. The solar-powered adsorption chiller system of claim 3 , wherein the integrated controller is configured to selectively and automatically control the first switch and the second switch in order to close the first circuit and to open the second circuit during the daytime, and to control the first switch and the second switch to open the first circuit and to close the second circuit loop following sunset or when solar radiation intensity is zero or close to zero.

5. The solar-powered adsorption chiller system of claim 4 , wherein the integrated controller is configured to control the first switch and the second switch such that the closing/opening of the FPSC-SCC-SPB circuit and the SPB-VR-RHW circuit is smooth, and the SPB-VR-RHW circuit closes nearly immediately following sunset or when solar radiation intensity is zero or close to zero, and for nearly uninterrupted water heating functionality at the HWST.

6. The solar-powered adsorption chiller system of claim 5 , comprising a plurality of SPBs connected in series.

7. The solar-powered adsorption chiller system of claim 5 , comprising a DC/AC inverter within the SPB-VR-RHW circuit.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Qadir Najam Ul
• Said Syed Ahmed M
• Mansour Rached Ben

Classifications

• F24D2200/02

  Photovoltaic energy · CPC title

• F24D2220/08

  Storage tanks · CPC title

• F25B27/007 Primary

  in sorption type systems · CPC title

• F24D17/0068

  with accumulation of the heated water · CPC title

• F25B27/002 Primary

  using solar energy · CPC title