1 Congratulations! Your unique solar monitor ID is located on your monitoring unit as seen on this page. To access your unique solar monitoring website, simply type: into your internet browser. (Where XXXX is your four digit ID number)
2 This document explains the graphs and data displayed on your solar monitoring website. It will give you a better understanding of its function and importance within your home.
3 Glossary Auxiliary Heater The secondary means of heating your water load, aside from solar. This is typically electric or gas. DHW - Domestic hot water. The water that exits your auxiliary heater and enters the home. e-mag e-mag Solar Pump. The e-mag consists of a rotary vane pump driven by a photovoltaic powered DC motor and controller. The e-mag pumps heat transfer fluid throughout the Solar Boiler and collectors. HTF Heat transfer fluid. Thermo-Dynamics Ltd uses a mix of food grade propylene glycol (40%) and distilled water (60%) kwh Kilowatt-hour. A unit of energy equivalent to one kilowatt of power expended for one hour of time. PV module - Photovoltaic module. The photovoltaic module converts radiation from the sun into power. This provides proportional power to the e-mag. SDHW Solar domestic hot water. The water that has been heated through the Solar Boiler.
4 Basic Information
5 The current time and date. The solar monitor logs data every minute. The power rating of your auxiliary heater. The amount of money saved, based on available energy in your solar storage tank. This is accumulated daily, monthly and yearly. Your type of auxiliary heater. The current status of your auxiliary heater. The number of hours your auxiliary heater has been operating and the kwh used. This data is logged daily, monthly and yearly. Reduction of carbon dioxide emissions through usage of your system. This is accumulated daily, monthly and yearly. The date your system began to log data. If your auxiliary heater is oil fired, the litres of oil consumed are logged here.
6 The graphs that accompany your solar data will be explained in the order you see them on your solar monitoring website. Terms will be defined and common trends will be highlighted.
7 Water Temperature Data
8 DHW temperature supplied to your home. SDHW temperature exiting you solar storage tank and entering your auxiliary heater. SDHW temperature exiting your Solar Boiler and entering your solar storage tank. Water temperature entering your solar storage tank.
10 The horizontal axis shows the time of day with current data on the far right, and data from 24 hours ago on the far left. Each notch represents 1.2 hours. The graph is currently posting data for approximately 12 noon, so notch represents 10:48 am. The data is logged every minute. The vertical axis represents water temperature measured in degrees Celsius (deg c).
11 Water Temperature Data
12 Common Trends 1. At about 5:00 PM, the collector temperature is now lower than the solar storage tank temperature, signaling the e-mag to shut off. It fluctuates on and off for the next hour until the sunlight is no longer strong enough to heat your water any further. 2. As you can see, the solar storage tank can hold enough SDHW to fulfill the need of a typical family during the night. The temperature is about 30 C at 6:30 AM when the family wakes to shower for the day ahead. The solar storage tank temperature quickly drops at this time. 3. The DHW temperature supplied to your home stays relatively constant, due to the assistance from your auxiliary heater. The spikes are due to the sensor being mounted on the pipe rather than inside your auxiliary tank. 4. At about 9:30 AM, the sun has risen and the HTF in your collectors have began to heat. The collected energy is transferred to your SDHW through the Solar Boiler.
13 Cumulative and Averaged Daily Water Data
14 Cumulative DHW consumption. Reset to zero at midnight. The daily percentage of DHW that has been heated by your Solar Boiler. Resets to zero at midnight.
15 SOL_FRAC_DAY FLOW_WATER_D
16 The horizontal axis shows the time of day with current cumulative and averaged data on the far right. Data from 24 hours ago is displayed on the far left. Each notch represents 1.2 hours. The graph is currently posting data for approximately 12 noon, so notch represents 10:48 am. The data is logged every minute and resets at midnight. The vertical axis represents water temperature measured in degrees Celsius (deg c), volume of DHW used in litres (L), and solar fraction (%).
17 Cumulative and Averaged Daily Water Data
18 Common Trends 1. The DHW usage slowly increases during the day due to dishes and laundry. In the evening, this usage increases rapidly due to filling the bathtub and showers. 2. By midnight, the Solar Boiler have been used to heat 98% of the DHW need for this household. 3. At midnight, this household has used 450 litres of DHW throughout the day. This value resets to zero, along with the solar fraction, and starts accumulating for another day s worth of data. 4. The temperature of the auxiliary heater stays relatively constant at 60 C. The solar storage tank temperature is higher during the night as compared to the morning, due to heating all day. 5. This household wakes at around 6:30 AM and begins to shower, using 120 litres of DHW.
19 HTF and Collector Temperature Data
20 Collector temperature, used by e-mag controls. Roof temperature. Temperature of HTF leaving your Solar Boiler. Temperature of HTF entering your Solar Boiler. Solar Boiler temperature, used by e-mag controls.
22 The horizontal axis shows the time of day with current data on the far right, and data from 24 hours ago on the far left. Each notch represents 1.2 hours. The graph is currently posting data for approximately 12 noon, so notch represents 10:48 am. The data is logged every minute. The vertical axis represents temperatures measured in degrees Celsius (deg c).
23 HTF and Collector Temperature Data
24 Common Trends 1. Your HTF temperature increase throughout the day. In this example, at about 5:00 PM, the HTF entering your Solar Boiler is at a temperature of nearly 60 C. It exits at about 45 C transferring energy to cold water running through your Solar Boiler system. 2. The outside and collector temperatures will decrease throughout the evening and during the night. This will cause your e-mag to shut off and any heating needs throughout the night will be done by your auxiliary heater. 3. Your solar storage tank temperature will fluctuate throughout the day, due to usage of DHW in your home. When you draw DHW from your tap, the solar storage tank temperature will decrease and will have to be replenished. It will be replenished during the day by your Solar Boiler and during the night by your auxiliary heater. 4. The collector temperature can fluctuate throughout the day due to passing clouds. This was the case for this system at around 9:30 AM.
25 Weekly Energy Data (Use the following energy flow diagram to better understand the next three graphs)
26 Energy Flow Diagram 1 Amount of solar energy radiated from the sun onto your collectors. Total energy transfer involved, between the cold water entering your home and the DHW exiting your auxiliary heater. 4 Energy removed from your solar storage tank. 3 2 Energy transferred from your Solar Boiler to your solar storage tank.
29 The horizontal axis shows the time of day with current data on the far right, and data from 7 days ago on the far left. Each notch represents 12 hours. The graph is currently posting data for approximately 12 noon. Notch (-0.5) represents 12 midnight and (-1) represents 12 noon the previous day. The data is logged every minute. The vertical axis represents energy data measured in kilowatt hours (kwh).
30 Weekly Energy Data 2 1
31 Common Trends 1. Six days ago there was a reduction in solar energy collected due to bad weather. This is apparent on the graph because the energy radiated on your collectors from the sun was low as compared to other days. Because of this, your auxiliary heater was the main source of energy to heat your DHW. 2. On a hot sunny day in October, the amount of energy radiated on your collectors from the sun can reach 40 kwh, resulting in high savings.
35 The horizontal axis shows the time of day with current data on the far right, and data from one month ago on the far left. Each notch represents 2.5 days, based on a 30 day month. The graph is currently posting data for approximately 12 noon of a given day. Notch (-10) represents 2.5 days ago at noon. The data is logged every minute. The vertical axis represents energy data measured in kilowatt hours (kwh).
36 Monthly Energy Data
37 The common trends are the dips in data as the solar monitoring resets every month.
41 The horizontal axis shows the time of day with current data on the far right, and data from one year ago on the far left. Each notch represents 1.2 months. The graph is currently posting data for approximately 12 noon of a given day. If today is October 1 st, then notch (-5) represents August 22 nd. The data is logged every minute. The vertical axis represents energy data measured in kilowatt hours (kwh).
42 Yearly Energy Data
43 The common trends are the dips in data as the solar monitoring resets every year.
44 PV Module Data
45 Amperage supplied by your PV module to your e-mag. This value is scaled by a factor of 10 on graph. Voltage supplied by your PV module to your e-mag. Power supplied by your PV module to your e-mag.
46 PV_VOLTS PV_AMPSX10 SOLAR_POWER_100
47 The horizontal axis shows the time of day with current data on the far right, and data from 24 hours ago on the far left. Each notch represents 1.2 hours. The graph is currently posting data for approximately 12 noon, so notch represents 10:48 am. The data is logged every minute. The vertical axis represents voltage (V), amperage (A) and solar flux (W/m 2 ). The amperage is scaled up on the graph by 10 and the solar power scaled down by 100. The maximum solar power is typically 1000 W/m 2 on a sunny day at noon.
48 Photovoltaic Module Data 1 2
49 Common Trends 1. The voltage supplied to your e-mag climbs rapidly when your PV module is exposed to sunlight. The maximum voltage supplied to your e-mag you can reach 21 Volts. 2. On a typical sunny day, the PV module voltage averages at about 15 Volts.
50 Flow Rates and e-mag Status
51 HTF flow rate through your collector and Solar Boiler. Cold water flow rate into your solar storage tank.
52 FLOW_GLY FLOW_WATER
53 This sensor indicates the status of your e-mag. ON is indicated with a 4 on the graph, OFF is indicated with 0. This sensor indicates that your collector temperature has surpassed 112 C (234 F). If this happens, it will be indicated on the graph with a 3 and the e-mag will shut off. Otherwise it will read 0. This sensor indicates that your solar storage tank temperature has surpassed 70 (158 F). If this happens, it will be indicated on the graph with a 2 and the e-mag will shut off. Otherwise, it will read 0. This sensor indicates that your storage tank temperature is higher than your collector temperature. If this is the case, the e-mag will shut off, as it is inefficient to pump colder water into your solar storage tank. If this happens, it will be indicated with a 1 on the graph. Otherwise, it will be indicated with a 0.
55 The horizontal axis shows the time of day with current data on the far right, and data from 24 hours ago on the far left. Each notch represents 1.2 hours. The graph is currently posting data for approximately 12 noon, so notch represents 10:48 am. The data is logged every minute. The vertical axis represents water and HTF flow rates measure in litres per minute (LPM).
56 Flow Rates and Pump Status 3 1 2
57 Common Trends 1. Your e-mag runs at a speed proportional to the amount of sunlight available. If there is a lot of sunlight, the HTF will heat faster, so the e-mag will move it through the system quicker. If there is minimal sunlight, the e-mag will run slower, allowing the HTF to heat up sufficiently. 2. In the evening at around 7 PM, the temperature of your solar panels is lower than your solar storage tank temperature. Because of this, your Collector < Storage Temp alarm will be activated and the e-mag will shut off. 3. When you draw water, you will notice a sharp jump in city water flow rate. The city water is flowing into your solar storage tank to replenish it. 4. The collector temperature can fluctuate throughout the day due to passing clouds. This was the case for the system at around 9:30 AM.
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