Does the connection and codes are the same? A tuning valve on each of the inlet flow diverting pipe and the outlet flow diverting pipe controls the ratio of heated and unheated flow entering the mixed flow pipe. For example, for potable water heating systems, the demand for hot water may peak during the morning hours, in which the flow rate will be high. It is noted that a fewer or greater number of circuits may be used, depending upon the wiring of the heater. In the exemplary embodiment, the diverted outlet flow passes into a diameter union section 84, to a carbon steel elbow 86, and then to the tee connector 70, where the heated diverted outlet flow is mixed with the unheated diverted inlet flow, from the inlet flow diverting pipe 18, producing the mixed flow, as will be described in greater detail herein. An exemplary load controller is Model BLC Series Base Load Controller manufactured by HDR Power Systems, Inc. of Columbus, Ohio. I will update the schematics. In this example case, the controller, To determine if stacking is occurring in the water heater tank, processing block. A first portion of the inlet diverting pipe may be a carbon steel pipe 60 having a inner diameter. No. Other methods include heating the stored water without pumping means and relying on natural convection to accomplish temperature control. Finally, for fire rates greater than about 66%, both the first and second circuits supply current as controlled by their respective contactors 100 and 102, and the third circuit is adjusted to meet the remaining percentage. All Rights Reserved. With reference to FIG. All the connections are same. Such placement does not permit precise control of the temperature of the water near the outlet of the tank as the water is to be delivered to the appliances or other users of hot water. 1 year ago, Hi Sandilya, I'm working on a project similar to this one but it's for heating water in a electric pressure cooker. In some cases, the stacking rate of change threshold value may be a preset value, a computed value, a user defined value, or any other value, as desired. Aerco International, Inc. (Northvale, NJ), 392/465, 392/498, 122/14.1, 122/13.07, 392/485, 392/474, 392/466. Sir, can we use the Arduino atmega328 as substitute of Arduino Pro Mini? So can you tell me please what is the problem. Orders Over $150 that ship via UPS in the USA. thank you. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHIAN, BRENT;NORDBERG, TIMOTHY J.;REEL/FRAME:020491/0285, PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552), JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, NEW YORK, SECURITY INTEREST;ASSIGNOR:ADEMCO INC.;REEL/FRAME:047337/0577, ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HONEYWELL INTERNATIONAL INC.;REEL/FRAME:047785/0166, PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY. While uploading the sketch in arduino IDE, you have to change the microcontroller to atmega 328. The mixed flow temperatures at 10% fire rate and 100% fire rate are recorded.
Stacking occurs when hotter water located at the top of the water heater tank becomes stacked on top of colder water at the bottom of the tank. The inlet flow pipe 16 is located towards the top of the shell 30 and communicates with the interior of the shell 30. While the water heating system disclosed in the '547 patent was a substantial improvement over the prior art, the present invention seeks to go even further and provides an electric water heating system that provides substantially constant temperature control with reduced complexity and cost to manufacture the system. I'm new to arduino coding and I'm really greatful for the project you made available online. Material 48 electrically insulates resistor wire 44 and conducts the heat produced by the resistor wire 44 to the metal sheath 46, thereby heating the water in the heat exchanger tank 12. If stacking is detected, then the setpoint for the heater may be lowered so that the outlet water temperature is within a safe limit. All rights reserved. A water temperature control system comprising: a sensor that detects water temperature in a container; a heater that heats water in the container; and. The invention relates to a water heating system, and more particularly to an electric water heating system having a control system for controlling the amount of heat transfer between the electric heat element and the water by modulating the current to the heating element to supply potable water at a substantially constant, controlled temperature.
The present approach may use a detection technique to note stacking. A method for operating a water heater, comprising: sensing water temperature in a water heater; measuring the water temperature change rate; and detecting whether stacking is occurring; and. As will be described in greater detail herein, the control system of the water heating system 10 maintains a setpoint temperature, which is typically about 130 F., and which may be as high as about 210 F. The water heating system 10 may deliver an output of approximately 425,000 BTU/hour (125 kW). No.
The first pattern may include frequent small to medium water draws and heating. A full line of water temperature control systems to meet demanding application needs. In this version I added temperature adjustment using rotary encoder and also added a display. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Steps (7) through (9) are repeated for each additional data point; preferably, the process is repeated for fire rates of 30% to 90% at 10% increments. Water heaters with a single temperature sensor located at or near the bottom of the water heater tank may be particularly susceptible to stacking. The present invention may include another approach and several changes and/or additions to the approach indicated herein and in U.S. patent application Ser. 20. This category only includes cookies that ensures basic functionalities and security features of the website. The component parts of the inlet diverting pipe 18, of the outlet diverting pipe 22, and of the mixed flow pipe 24 described herein are exemplary, and it is noted that this configuration could be substituted with different components or with tubing. After the temperature of the water at the bottom of the water heater tank reaches a certain desired temperature, the water heater typically stops heating the water for a period of time. A water heater may have at least one heating element or heater, such as a gas-fired burner and/or electric element. Subsequently, steps (1) through (6) are repeated.
19, 2007, which has the same assignee as the present application. In operation, water heaters typically heat cold or ambient temperature water entering at or near the bottom of the water heater tank to a desired temperature using a gas-fired burner, an electric heater or some other heating element. Hello sir!I am doing same in arudino uno.. Can it's works ????? s.parentNode.insertBefore(n, s); is if it 220V or 5V. If stacking is detected, then the setpoint may be lowered so that the outlet water temperature will be within the safe limit. For example, the control sequence may be run at intervals of time, namely dt, which, in some cases, may be on the order of tenths of seconds, seconds, tens of seconds, or at any other interval as desired. It had only 2 temperature setup. Is there anything that I should change because when I am connecting all components, The temperature sensor is getting heated and the display will be in standby mode and if I change the temperature with rotary encoder it is not changing. As determined empirically, the orifice 58 may have a diameter of about inch. As described above with respect to the inlet flow pipe 16, a second orifice disk 74 is positioned inside the outlet pipe 20 slightly downstream from the outlet diverting pipe 22. A further object of the present invention is to provide an empirical relationship between the temperature of a mixed flow of inlet water and outlet water and the current applied to the heating element to maintain the setpoint temperature. The controller may use a sensing and calculation technique to detect the stacking. A sensor is often provided at or near the bottom end of the water heater tank to sense the temperature of the water. Our source is Line to Line. Did you make this project? JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, Owner name: The mixed flow passes through another portion 96 of the mixed flow pipe 24, which may be a carbon steel pipe, and continues through another weldolet 98 which communicates with the outlet flow pipe 20. Alternatively, the temperature of the mixed flow may be measured by other temperature sensors known in the art, such as thermocouples, resistance temperature detectors (RTDs), thermistors, and the like. For a fire rate greater than about 33% but less than about 66%, the first circuit supplies current as controlled by the first contactor 100, and the third circuit is selectively adjusted to provide the remaining percentage commanded. Features: A Deluxe, completely automatic remote control system provides effortless, accurate control of all fill, heat and drain functions from an attractive remote control console panel. If significant stacking exists in the tank, then the bottom water may be heated much faster than the top water. Sir were having a trouble. During this second iteration, the adjustment of tuning valves 62 and 82 at steps (3) and (6) is performed to arrive at a single setting for each tuning valve that satisfies both the first condition and the second condition. The other approach and changes and/or additions may include, but not be limited to, a specific technique for the adjustment of a setpoint offset, and a use of heating rate to detect stacking and reduce setpoint to limit stacking. Drain your baptistry with the flip of a switch at the control panel. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHIAN, BRENT;NORDBERG, TIMOTHY J.;REEL/FRAME:020491/0285, Free format text: This package includes everything but the actual heater/- please select one of our 3kw, 6kw or 11.5kw heaters to complete your baptistery heat and fill system. Owner name: 4 is a simplified block diagram of the temperature control system of the water heating system in accordance with the invention. What is the problem sir? No. This is the modification of my old version. For example, for an 80% fire rate, the first and second circuits supply the first 66%, and the third circuit is selectively adjusted to approximately 42% of the third circuit's power to provide the remaining 14%. 19, 2007, is hereby incorporated by reference. The upper flange 32 and lower flange 34 are also manufactured from ANSI SA-516 grade 70 carbon steel.
Cooler and denser water, once on top of the water being heated, falls toward the bottom of the water heater tank so that it can be heated or reheated to the desired temperature. Reply Demand on the system may remain low for a long period of time, and increase to a higher level at certain times of the day, e.g., in the mornings. Under certain conditions, such as when short water draws occur, the water temperature near the top of the water heater tank can increase well above the water temperature set point, which is sometimes referred to as stacking. if the heating rate is sufficiently high heating rate and there is a long heater on time, then the set point offset is reduced. Consequently, water flow rates may be in the range of about 0 gpm to about 10 gpm for the exemplary embodiment, and about 60 gpm for larger capacity water heating systems in accordance with the invention. For an exemplary embodiment having three circuits, it is noted that a single SCR could provided for each circuit. In the present specification, some of the matter may be of a hypothetical or prophetic nature although stated in another manner or tense. a mechanism, having a water temperature set point, connected to the sensor and heater, wherein the mechanism detects a water temperature change rate according to the sensor at initial start-up of the heater and afterwards, the mechanism detects stacking, and the mechanism adjusts the water temperature set point via a set point offset to turn on or off the heater to limit top water temperature within a safe range when the stacking occurs in the container.
Sign up today to receive the latest news, product updates and new product releases. The inlet flow diverting pipe carries a portion of the inlet flow diverted from flowing into the tank, and the outlet flow diverting pipe carrying a portion of the outlet flow diverted from the outlet. Although the invention has been described with respect to at least one illustrative example, many variations and modifications will become apparent to those skilled in the art upon reading the present specification. upon a start of heating water in the water heater, monitoring the water temperature change rate; and. FIG. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). The lower flange 34 may be bolted to a bottom portion 36, which may be a 16 diameter, 1 inch thick carbon steel plate having a flat or concave configuration. Each resistor wire 44 is connected to a respective terminal pin 50 (only one of which is shown in FIG. For example, an output of about 3,500,000 BTU/hour (1 MW) may be produced by a larger capacity water heating system configured in accordance with the principles of the invention. PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY. As illustrated in FIG.
Consequently, the amount of heat added to the water to increase the temperature of the outlet flow to the setpoint temperature is a function of the mass flow rate and the difference between the inlet flow temperature and the outlet flow temperature: The water heating system in accordance with the invention controls the temperature of the outlet flow by establishing an empirical relationship between the temperature of the mixed flow and the amount of current added to the electric heater. This system has a buzzer i.e., when the water is heated buzzer starts to sound. 1. FIG. Question We'll assume you're ok with this, but you can opt-out if you wish. upon subsequent heating of the water by the heating element, if the water temperature change rate is greater than N times the base heat rate where, N is greater than one, then set point is reduced M degrees. ADEMCO INC., MINNESOTA, Free format text: The cooling of the incoming cold water and the heating of the heater may balance out, leaving a dynamically balanced stacking in the tank.
Privacy Policy 3 is a sectional view of the water heating system illustrated in FIG. To take advantage of the heat-rises principle, the heater is typically located at or near the bottom of the water heater tank. 5 is a representative graph illustrating the relationship between mixed flow temperature and percentage fire rate of the heater in accordance with the invention.
I am sure it will work. Thanks in advance. Fill and heat your baptistry with thesimple turn of a switch on the control panel. A separate, 110v or 240v line is required to operate the heater and pump. Since it is not possible to screw fit, I super glued some scrap wood. the controller determines a water temperature change rate from the sense signal; the controller provides the control signal according to the water temperature set point mechanism and the sense signal; and. During a heating cycle, the cold or ambient temperature water at or near the bottom of the water heater tank becomes hotter and begins to rise towards the top of the water heater tank. For the exemplary embodiment described above, the tabular data was obtained at a plurality of fire rates between a substantially minimum current, e.g., about 10%, and a substantially maximum current, e.g., about 100%. The resulting relationship is plotted in a table, such as the exemplary table illustrated in FIG. 2).
Where is the updated schematic diagram? It has an amazing feature that is last memory. i just saw your vid. Each TCU combines precise, automatic temperature control with easy operation for unmatched reliability and performance. This process is performed in order to adjust the boundaries of the mixed flow temperature to provide a monotonic curve, wherein there is one unique value of fire rate for every value of sensed mixed flow temperature. Hi! After 3 buzzers, hot water will be ready. In order to prepare this graph, temperature measurements are made of the outlet flow and the mixed flow. The water flow continues through the copper tube 64, to a second compression fitting 68, and to a tee connector 70, which may be manufactured from carbon steel. The input parameter 302 is the temperature of the mixed flow, and the output parameter 304 is the fire rate. upon a control signal that initially turns on the heating element when temperature of the water is nearly uniform, a water temperature change rate is determined and saved as a base heat rate; and. One is placing the sensor away from the heating element. These objectives and characteristics are achieved, in accordance with the present invention, by providing a novel combination of several components, including a heat exchanger tank, an inlet flow diverting pipe, an outlet flow diverting pipe, a mixed flow diverting pipe, and a temperature control system. U.S. Appl. The heat exchanger tank 12 is configured to receive unheated water from the inlet flow pipe 16, to contain the water which is heated as it flows around heating elements of the heater 14, and to direct the heated water to the outlet flow pipe 20 to be used for hot water faucets, showers, washing machines, etc. In another instance, one may consider low draw rate with continuous heating. n.src = "//paypal.adtag.where.com/merchant.js"; 5 is loaded into the process controller 96 as a table look-up function. As illustrated in FIG. Since the system has no way of anticipating this abrupt change, it fails to call for heat as early as it should, and, when a call for heat is made, the system must run at maximum capacity for an extended period in order to catch up with the demand.
Inline/Circulation Water Heater brochure. With a sensor mounted at the lower portion of the tank, the sensed heating rate may be faster than that when the water is close to uniform.
JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, NEW YORK, Free format text: When water temperature in a water tank is close to uniform and heater is on, the water in the tank may be heated nearly uniformly. Because only a relatively small amount of colder water may be located at or near the bottom of the water heater tank, particularly in short water draw situations, the resulting heating cycles may be relatively short. It is therefore the intention that the appended claims be interpreted as broadly as possible in view of the prior art to include all such variations and modifications. Share it with us! Necessary cookies are absolutely essential for the website to function properly. A portion of the flow in the inlet flow pipe 16 is diverted into an inlet diverting pipe 18, which may include several components. Attach that bracket to the immersion water heater so as to fit the temperature sensor and secure the wire with zip tie.Note: Since the temperature sensor is fitted very near to heating element, temperature raises very fast and the heater will be shutdown. FIG. "use strict";
A second data point is defined by the condition wherein the first and second tuning valves are tuned such that the temperature of the mixed flow is a predetermined temperature below the setpoint temperature when the heating element is at substantially minimum current. One may consider the case with no water draw. Also, the heating cycles may occur relatively often. The load controller 98 may be programmed to allocate the current among the three circuits. Immediately heat is spread and temperature goes down and heater will be switch ON. Lot of modifications made to the previous temperature code. In regulating the heat output, the more current impressed on the electric heating element, the more heat is produced. In one case, the offset may be 9 degrees. Assignors: CHIAN, BRENT, NORDBERG, TIMOTHY J. A controller with a connection to a temperature sensor and heating element in a water tank of the heater may be designed to limit stacking and its effects. All functions of this Complete Automatic Control System are operated by one 3-way "on," "off," "drain" switch. After adjusting the tuning valves 62 and 82, the ratio of inlet flow and outlet flow into the mixed flow pipe 24 is fixed. When the device is turned ON, startup screen appears and then heating starts with reference to the EEPROM temperature set (That is set previously). 11/764,940, filed Jun. A system for detecting stacking and controlling temperature in a water heater. PATENTED CASE, Free format text: SECURITY INTEREST;ASSIGNOR:ADEMCO INC.;REEL/FRAME:047337/0577, Owner name: 5, and is obtained by empirical testing. When turned ON for first time we have to set down the temperature because the default temp is above 100 c. To change the temperature click the button of rotary encoder. A first portion of the outlet diverting pipe 22 may be a carbon steel pipe section 80, which is connected to a second tuning valve 82, such as a ball valve or other type of valve, to control the diverted outlet flow.
In some cases, the stacking rate of change threshold value may be any value from, for example, 0.1 degrees Fahrenheit per second to 10 degrees Fahrenheit per second. As yet another alternative, a plurality of contactors may be utilized to provide incremental control, with increased control provided by increasing the number of contactors. The heater 14 is positioned within the shell 30 and heats the water as it flows around the heating elements through the heat exchanger tank 12.
This will happen very fast for 3 times until the preset temperature reaches. A water heater control system comprising: a water temperature sensor for providing a sense signal indicative of a temperature of water proximate to the sensor; a heating element for heating water proximate to the element according to a control signal; and, a controller having a water temperature set point mechanism for receiving the sense signal and for sending the control signal; and. & Terms of Use. It is noted that the above capacities and dimensions are exemplary, and the water heating system as described herein may be modified in order to meet the demands of other systems. 2 is a perspective view in partial section illustrating a portion of the water heating system in accordance with the invention. The heater 14 in the exemplary embodiment may be an immersion heater, such as the Chromalox immersion heater manufactured by the Wiegand Industrial Division of Emerson Electric Co., of Ogden, Utah., which is rated at 440V and 125 kW. the constant is in a range from one degree to five degrees F.; and. The mixed flow contacts the temperature sensor 26 positioned adjacent the tee connector 92, where the temperature of the mixed flow is obtained, as will be described in greater detail below. Then it works. The heater 14 includes a plurality of hairpin bent tubular heating elements 40 welded or brazed to a flange 42. Since 1979 providing churches with baptistries, steeples, pews, kneelers, cushions, altar candles, paschal candles, candlesticks, tabernacles, offering boxes, baptistry heaters and more! During operation, when demand for hot water arises (e.g., someone turns on a faucet), fresh, cold or ambient temperature water typically enters the water heater tank at or near the bottom of the water heater tank, and pushes out or supplies the hotter water at or near the top of the water heater tank to service the hot water request.
Water flows downward through the heat exchanger tank 12 to the outlet flow pipe 20, which is located towards the bottom of the shell 30, and which also communicates with the interior of the shell 30. The mixed flow pipe is configured to carry a flow of liquid partially received from the inlet flow diverting pipe and partially received from the outlet flow diverting pipe. It is noted that this power allocation is exemplary, and alternative arrangements may be provided as is known in the art. In some cases, the water at or near the top of the water heater tank may become substantially hotter than the lower, safer temperature water at or near the bottom of the water heater tank.
These cookies do not store any personal information. 1 in accordance with the invention. 2), which are wired, e.g., by brazing, to circuits controlled by the control system 28 (not shown in FIG. In an alternative water heater approach (not shown), the heat output may be controlled by an electric current flow through a resistive heating element. In this case, the offset would be a negative value under many operating conditions. In order to control the power provided to the heater in the exemplary embodiment, two of the circuits have a discrete on-off control by electromechanical contactors 100 and 102, and the third circuit may be selectively modulated with greater resolution by an SCR 104. 2004-2022 FreePatentsOnline.com. I provided the code in next step separately. In the previous version there is no possibility of adjusting the temperature that we need. Solder wire for 220v input and 5v output. wherein if the water temperature change rate is equal to or greater than zero, then set the set point to a maximum of the present water temperature plus a constant or of the set point minus a maximum set point offset permitted. 4, the temperature of the mixed flow is detected by the temperature sensor 26. A portion of the water in the inlet flow pipe 16 passes through the orifice 58 and into the heat exchanger tank 12, and another portion hits the plate 56 and is diverted into the diverting pipe 18. The shell 30 may be manufactured from ANSI SA-53 grade B carbon steel pipe. Other hot water temperature control devices have used electric heating elements to heat the water. The mixed flow then combines with the outlet flow. The data provided in FIG. No. Without such an adjustment, the mixed-flow temperature vs. fire rate curve may flatten at the boundaries, such that the process controller 96 would have difficulty in commanding a fire-rate based on a sensed temperature value.
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If stacking is too high, it may cause safety concerns. All such other embodiments, therefore, are intended to be included within the spirit and scope of the appended claims. At other times of the day, demand will be lower, and the flow rate will also be lower.
Before uploading the code remove all the connections from arduino pro mini. However, it is contemplated that any suitable offset may be used, as desired. Our arduino pro mini doesn't work and we couldn't upload codes. the maximum set point offset is in a range from ten degrees to thirty degrees F. the constant is approximately two degrees F.; and. The amount of energy Q. that must be added to the water to achieve the setpoint temperature is described by the equation: where, {dot over (m)} represents the mass flow rate of the water, c is the heat capacity of the water, and T is the difference between the inlet flow temperature and the outlet flow temperature. Hello sir I have seen your project and I am trying to do the same at my home and i am using Arduino UNO atmega328P.
The present invention pertains to thermal control systems and particularly to control systems for water heaters.
If the sensed temperature is close to the setpoint, the outlet water may be significantly higher. Thank You in advanced sir. Water heaters may be used in homes, businesses and just about any establishment that has a need for heated water. Another object of the present invention is to provide an electric water heater which does not require complicated apparatus. Only when the heating rate is high enough (and the burner has been on for a long time) may the setpoint offset be reduced. The water heating system in accordance with the invention maintains the temperature of the outlet flow by adding heat to the water in the heat exchanger tank 12. the controller detects stacking and compensates the set point mechanism according to the sense signal to keep temperature stacking of the water within a safe limit.