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I am trying to create a week's energy use data for water heating. I have included a mixed water heater in the simulation. I have set the setpoint temperature at 130F. My water use equipment is a shower, whose temperature of use is set at 110F. I also entered a water schedule for each day of the week. I am facing two problems:

1. The results show that the water in the water heater has a temperature between 139.4F and 130.4F. I intend to keep the water temperature constant at 130F. Or if I cant keep it constant, then let it fluctuate between 130F and 131F. I do not understand why the water temperature goes up to 139, if my setpoint is at 130F.
2. The results also show that the water heater only uses energy when the temperature of the water falls below 130.4, and it remains on till the temperature reaches 139.4. Then it turns off, until the heat loss pushes the temp back below 130.4. But the water heater does not turn on when there is hot water use as indicated in my schedule or indicate a faster rate of heat loss in the tank due to the introduction of cold water in the tank. This seems to be perplexing. How do I make sure that the water heater energy use reflects the changes in system when hot water is consumed?

Any help would be greatly appreciated.

Thank you.

Yash

I am trying to create a week's energy use data for water heating. I have included a mixed water heater in the simulation. I have set the setpoint temperature at 130F. My water use equipment is a shower, whose temperature of use is set at 110F. I also entered a water schedule for each day of the week. I am facing two problems:

1. The results show that the water in the water heater has a temperature between 139.4F and 130.4F. I intend to keep the water temperature constant at 130F. Or if I cant keep it constant, then let it fluctuate between 130F and 131F. I do not understand why the water temperature goes up to 139, if my setpoint is at 130F.
2. The results also show that the water heater only uses energy when the temperature of the water falls below 130.4, and it remains on till the temperature reaches 139.4. Then it turns off, until the heat loss pushes the temp back below 130.4. But the water heater does not turn on when there is hot water use as indicated in my schedule or indicate a faster rate of heat loss in the tank due to the introduction of cold water in the tank. This seems to be perplexing. How do I make sure that the water heater energy use reflects the changes in system when hot water is consumed?

Any help would be greatly appreciated.

Thank you.

Yash

I am trying to create a week's energy use data for water heating. I have included a mixed water heater in the simulation. I have set the setpoint temperature at 130F. My water use equipment is a shower, whose temperature of use is set at 110F. I also entered a water schedule for each day of the week. I am facing two problems:

1. The results show that the water in the water heater has a temperature between 139.4F and 130.4F. I intend to keep the water temperature constant at 130F. Or if I cant keep it constant, then let it fluctuate between 130F and 131F. I do not understand why the water temperature goes up to 139, if my setpoint is at 130F.
2. The results also show that the water heater only uses energy when the temperature of the water falls below 130.4, and it remains on till the temperature reaches 139.4. Then it turns off, until the heat loss pushes the temp back below 130.4. But the water heater does not turn on when there is hot water use as indicated in my schedule or indicate a faster rate of heat loss in the tank due to the introduction of cold water in the tank. This seems to be perplexing. How do I make sure that the water heater energy use reflects the changes in system when hot water is consumed?

Any help would be greatly appreciated.

Thank you.

Yash

I am trying to create a week's energy use data for water heating. I have included a mixed water heater in the simulation. I have set the setpoint temperature at 130F. My water use equipment is a shower, whose temperature of use is set at 110F. I also entered a water schedule for each day of the week. I am facing two problems:

1. The results show that the water in the water heater has a temperature between 139.4F and 130.4F. I intend to keep the water temperature constant at 130F. Or if I cant keep it constant, then let it fluctuate between 130F and 131F. I do not understand why the water temperature goes up to 139, if my setpoint is at 130F.
2. The results also show that the water heater only uses energy when the temperature of the water falls below 130.4, and it remains on till the temperature reaches 139.4. Then it turns off, until the heat loss pushes the temp back below 130.4. But the water heater does not turn on when there is hot water use as indicated in my schedule or indicate a faster rate of heat loss in the tank due to the introduction of cold water in the tank. This seems to be perplexing. How do I make sure that the water heater energy use reflects the changes in system when hot water is consumed?

Any help would be greatly appreciated.

Thank you.

Yash

I am trying to create a week's energy use data for water heating. I have included a mixed water heater in the simulation. I have set the setpoint temperature at 130F. My water use equipment is a shower, whose temperature of use is set at 110F. I also entered a water schedule for each day of the week. I am facing two problems:

1. The results show that the water in the water heater has a temperature between 139.4F and 130.4F. I intend to keep the water temperature constant at 130F. Or if I cant keep it constant, then let it fluctuate between 130F and 131F. I do not understand why the water temperature goes up to 139, if my setpoint is at 130F.
2. The results also show that the water heater only uses energy when the temperature of the water falls below 130.4, and it remains on till the temperature reaches 139.4. Then it turns off, until the heat loss pushes the temp back below 130.4. But the water heater does not turn on when there is hot water use as indicated in my schedule or indicate a faster rate of heat loss in the tank due to the introduction of cold water in the tank. This seems to be perplexing. How do I make sure that the water heater energy use reflects the changes in system when hot water is consumed?

Any help would be greatly appreciated.

Thank you.

Yash

I am trying to create a week's energy use data for water heating. I have included a mixed water heater in the simulation. I have set the setpoint temperature at 130F. My water use equipment is a shower, whose temperature of use is set at 110F. I also entered a water schedule for each day of the week. I am facing two problems:

1. The results show that the water in the water heater has a temperature between 139.4F and 130.4F. I intend to keep the water temperature constant at 130F. Or if I cant keep it constant, then let it fluctuate between 130F and 131F. I do not understand why the water temperature goes up to 139, if my setpoint is at 130F.
2. The results also show that the water heater only uses energy when the temperature of the water falls below 130.4, and it remains on till the temperature reaches 139.4. Then it turns off, until the heat loss pushes the temp back below 130.4. But the water heater does not turn on when there is hot water use as indicated in my schedule or indicate a faster rate of heat loss in the tank due to the introduction of cold water in the tank. This seems to be perplexing. How do I make sure that the water heater energy use reflects the changes in system when hot water is consumed?

Any help would be greatly appreciated.

Thank you.

Yash

I am trying to create a week's energy use data for water heating. heating in Openstudio. I have included a mixed water heater in the simulation. I have set the setpoint temperature at 130F. My water use equipment is a shower, whose temperature of use is set at 110F. I also entered a water schedule for each day of the week. I am facing two problems:

1. The results show that the water in the water heater has a temperature between 139.4F and 130.4F. I intend to keep the water temperature constant at 130F. Or if I cant keep it constant, then let it fluctuate between 130F and 131F. I do not understand why the water temperature goes up to 139, if my setpoint is at 130F.
2. The results also show that the water heater only uses energy when the temperature of the water falls below 130.4, and it remains on till the temperature reaches 139.4. Then it turns off, until the heat loss pushes the temp back below 130.4. But the water heater does not turn on when there is hot water use as indicated in my schedule or indicate a faster rate of heat loss in the tank due to the introduction of cold water in the tank. This seems to be perplexing. How do I make sure that the water heater energy use reflects the changes in system when hot water is consumed?

Any help would be greatly appreciated.

Thank you.

Yash