Water Heating System and Valving for These
a technology for water heating systems and valvings, which is applied in the field of freshwater stations, can solve problems such as pressure on the system, system failure to use drain back features in solar applications, and damage to collectors or pipes, and achieve the effect of boosting solar energy
Inactive Publication Date: 2018-06-07
RHEEM AUSTRALIA PTY LIMITED
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The patent describes a valve arrangement that has three ports and can control which pump is connected to the outlet. It uses a flap that is hinged to the main body of the valve and can move between two positions. This allows for efficient control of the pumps and helps to prevent interference between them. The technical effect of this arrangement is improved control and reliability in pumping operations.
Problems solved by technology
Solar thermal water heating systems with solar panels are subject to temperature and duty cycle events which threaten the integrity of the collector or its pipes.
In the case of freezing temperatures and ice formation, or over-temperature situations where continuing to heat the working fluid at the collector when there is solar energy absorbed but which can no longer be dissipated within the system, resulting in the super heating of the working fluid, both situations can cause pressurising of the system.
Such systems are not able to use a drain back feature in solar applications, because the installation of one way valves in the circuit makes backward flow not possible.
When such a valve is used there is an inherent increase in pressure drop across the valve caused by the pump in the circuit when the valve closes to restrict the flow of hot water.
A second disadvantage of a valve based system is that, due to the large pressure drop across the valve, large pumps and their associated high cost and power requirements are a necessity.
Method used
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Embodiment Construction
[0049]Illustrated in FIG. 1 is a schematic of a solar water heating system 10 which comprises a primary circuit made up of a solar collector 11 (only one illustrated for ease of illustration—whereas a gang or bank of such collectors is normally used), a solar pump skid 12, heat transfer fluid tank 13 which serves as a drain back tank, and a delivery skid 14 (which includes a heat exchanger 14.1—only one illustrated for ease of illustration—whereas a gang or bank 2 or more of such skids 14 can be used as described below in respect to FIGS. 15 to 17), and a potable hot water delivery circuit or secondary circuit 15, which are all plumbed and connected together as described below.
[0050]The solar collection panel or collector 11 has an entry port 11.1 in its base and an exit port 11.2 at its top so that heated transfer fluid can exit the collector and via conduit 100 transfers to or makes it way to the drain back tank 13. The collector 11 includes a temperature sensor 11.3 which has its...
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A pump system for use with a solar collector system which is used to heat a heat transfer fluid, includes a storage tank and the pump system having a first and second pump arranged in parallel which can pump the heat transfer fluid from the storage tank to a solar collector, so that should one pump fail the other pump can function, wherein the outlet of the first pump and the outlet of the second pump are connected to a valve arrangement, whereby when the first pump operates the outlet of the second pump is substantially closed by the flow from the first pump and when the second pump operates the outlet of the first pump is substantially closed by the flow from the second pump.
Description
FIELD OF THE INVENTION[0001]The present invention relates to freshwater stations or district water heating systems, and in particular in improvements to the primary circuit and the secondary circuit of such systems. More particularly the present invention can be used with solar water heating systems, electric boosted solar systems, gas boosted solar systems, cogeneration systems and hybrid systems.BACKGROUND OF THE INVENTION[0002]Solar thermal water heating systems with solar panels are subject to temperature and duty cycle events which threaten the integrity of the collector or its pipes. In the case of freezing temperatures and ice formation, or over-temperature situations where continuing to heat the working fluid at the collector when there is solar energy absorbed but which can no longer be dissipated within the system, resulting in the super heating of the working fluid, both situations can cause pressurising of the system. In either of these circumstances, one solution is to ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F04D13/12F04D15/02F24D17/00F24D19/10F04D15/00F28D20/00
CPCF04D13/12F04D15/0016F04D15/0263F04D15/029F24D17/0068F24D19/1057F24D2200/04F24D2200/08F24D2200/14F24D2220/06F24D2220/08F28D20/0034F28F2265/10F28F2265/00F04D15/0245Y02E10/44Y02B10/20F24H15/225F24H15/281F24H15/335F24H15/174F24H15/215F24H15/315Y02B10/70F24S10/00F24S50/40
InventorCOOPER, JOSH
OwnerRHEEM AUSTRALIA PTY LIMITED