DESC: TECHNICAL FIELD
[001] The present subject matter described herein, in general, relates to hot water storage, and more particularly to a saturation condition pressurized hot water (at saturated pressure) storage for steam generation.
BACKGROUND
[002] Conventional heat source or Solar heat source are used presently for flash steam generation using pressurized hot water storage. Flash steam generation is widely applicable for different sorts of process heat applications.
[003] The present methods have limitation for maximum flash steam generation from given pressurized hot water storage. Maximum flash generation is only possible when the pressurized water is supplied at constant saturation pressure.
SUMMARY
[004] This summary is provided to introduce aspects related to a pressurized hot water storage for steam generation and the aspects are further described below in the detailed description. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.
[005] In one implementation generation of a flash steam at a constant pressure is disclosed. The generation of flash steam may comprise of storing hot water under pressure. Further, using the pressurized hot water in tandem with cold water from a cold water storage may enable steam flashing at constant pressure along with hot water as a separate stream.
[006] In another implementation pressurized storage system is disclosed. The system may comprise a hot water storage 102. Further the system may comprise a flash vessel 112 connected to the hot water storage 102. The system may further comprise a cold water storage 104 connected to the hot water storage 102 through a non-return valve 110.
BRIEF DESCRIPTION OF THE DRAWINGS
[007] The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer like features and components.
[008] Figure 1 illustrates a block diagram, in accordance with an embodiment of the present subject matter.
DETAILED DESCRIPTION
[009] The present subject matter discloses a pressurized storage system configured to generate and discharge flash steam and hot water.
[0010] A pressurized storage system for flash steam generation at constant pressure is disclosed. The pressurized storage system may comprise of two storage tanks, a hot water storage and a cold water storage. The hot water storage may be kept under pre-defined pressure. The two storage tanks of the present system may be connected with pipes.
[0011] Further, the pressurized storage system may start with heating of water/fluid in the hot water storage, wherein the hot water storage may be insulated. Steam / suitable working fluid may be used for heating of water/fluid up to a saturation temperature. The heating of water/fluid to the saturation temperature leads to increased pressure of water/fluid thus converting to hot water under pressure. Further the cold water storage tank may not be insulated and may contain compressed air or gas under pressure. This may be defined as charging mode.
[0012] According to the present disclosure, flash steam is generated by releasing the water from the hot water storage. The hot water is directed to flow through a flash vessel with frustum shape; the flash vessel segregates steam and hot water and redirects their flow. The steam from the flash vessel is regulated by regulating the flow rate of hot water.
[0013] Referring to Figure 1, illustrates a block diagram, in accordance with an embodiment of the present disclosure. According to the block diagram a pressurized storage system 100 is disclosed. The pressurized storage system 100 may comprise a hot water storage 102. Steam is generated and supplied to the pressurized storage system 100. The steam and hot water at saturated condition is stored under pressure in the hot water storage 102. The pressure of the hot water storage 102 may vary between 2 bar to 10 bar. The hot water storage may store about 20% of steam in vapour form and about 80% in hot water form. Due to the pressure, the saturation point of the hot water may be raised to a defined value. Further the stored hot water and the steam may be released from the hot water storage 102, in regulated manner when desired. In an exemplary embodiment the hot water may be released at a constant pressure while compressed air/gas may be supplied from the top of the hot water storage 102. Further the hot water may be supplied to a flash vessel 112. The flash vessel may be frustum shaped. Further the flash vessel 112 may segregate and re-direct hot water and the steam based on application.
[0014] The pressurized storage system 100 may further comprise a cold water storage 104. The cold water storage 104 may comprise compressed air / gas and water at ambient temperature. The volume ratio of air to water in the cold water storage tank 104 is inverse of volume ratio steam to hot water in hot water storage 102. Further the cold water storage 104 may be connected to a compressor 106 for compressing air. The cold water storage 104 may further be connected to a pressure transmitter 108 and a pump 114. When the pressure transmitter 108 detects drop in pressure, the pump 114 is activated to pump water at ambient temperature into 104. Further the cold water storage 104 is connected to the hot water storage 102 through a non-return valve 110. Further, the pump 114 may be connected to ambient water source 116.
,CLAIMS:I/WE CLAIM:
1. A pressurized storage system 100, the system comprising:
a hot water storage 102, wherein the hot water storage is configured to store 20% steam and 80% hot water at saturated condition;
a flash vessel 112 connected to the hot water storage, wherein the flash vessel is configured to receive hot water from the hot water storage 102; and
a cold water storage 104 connected to the hot water storage 102 through a non-return valve 110, wherein the cold water storage 104 is configured to transfer compressed air, and water at ambient temperature into the hot water storage 102.

2. The pressurized storage system of claim 1, wherein pressure in the hot water storage 102 varies in range of 2 bar to 10 bar.
3. The pressurized storage system of claim 1, wherein the flash vessel 112 has a frustum shape.
4. The pressurized storage system of claim 1, wherein a volume ratio of air to water in the cold water storage tank 104 is inverse of volume ratio steam to hot water in hot water storage 102.
5. The pressurized storage system of claim 1, wherein the cold water storage 104 is further connected to a compressor 106, a pressure transmitter 108 and a pump 114.
6. The pressurized storage system of claim 5, wherein the pump 114 is connected to ambient water source 116.