# How to Estimate the Size of Hot Water Accumulators for Residential Buildings?

• TSN79
In summary, the conversation discusses the need for estimating the size of hot water accumulators for residential buildings. The person has created graphs to compare the demand for hot water throughout the day to the production rate of new hot water, but has not been able to make sense of it. They are seeking a good method and appreciate any help. They also mention a website with helpful information and conversion tools, but note that their company uses standard units instead of metric. The website provided is in metric units.
TSN79
I'm looking for a way to estimate the size of hot water accumulators for residental buildings. I have made myself graphs describing the varying demand of hot water during a typical day, and then compared this to a graph describing the production rate of new hot water. This is according to a school book of mine, however I've not been able to get much sense out of it. If anybody knows of a good method I'll really appreciate it :)

Here is a page with some useful information and conversion tools. My company still works in standard and not metric terminology, so if I give you my methods, it may confuse you. The site is in metric units.

http://www.engineeringtoolbox.com/design-hot-water-system-d_92.html"

Last edited by a moderator:

There are a few factors to consider when estimating the size of hot water accumulators for residential buildings. The first is the average daily hot water usage for the specific building, which can vary based on the number of occupants and their water consumption habits. The second factor is the temperature of the incoming water, as colder water will require more energy to heat up.

One method to estimate the size of hot water accumulators is to use the peak demand calculation. This involves multiplying the number of occupants by the average daily hot water usage per person, and then factoring in the temperature difference between the incoming water and the desired hot water temperature. This will give you an estimate of the maximum amount of hot water needed at any given time, which can then be used to determine the appropriate size of the accumulator.

Another approach is to use the graphs you have created to analyze the hot water demand and production rate. By identifying the peak demand periods and comparing them to the production rate, you can estimate the size of the accumulator needed to meet the demand without running out of hot water.

It is also important to consider the type of hot water system being used in the building, as this can impact the size of the accumulator needed. For example, a tankless hot water system may require a smaller accumulator compared to a traditional tank system.

Ultimately, the best method for estimating the size of hot water accumulators will depend on the specific details and needs of each residential building. It may be helpful to consult with a professional or do further research to determine the most accurate and efficient size for your particular situation.

## 1. What is the purpose of a hot water accumulator?

A hot water accumulator is used to store and release hot water in a controlled manner, allowing for efficient use of energy and hot water supply. It helps to maintain a constant supply of hot water, even during peak demand periods.

## 2. How does the size of a hot water accumulator affect its performance?

The size of a hot water accumulator determines its storage capacity, which in turn affects its performance. A larger accumulator can store more hot water and provide a longer lasting supply, while a smaller accumulator may be more suitable for smaller hot water demands.

## 3. What factors should be considered when determining the size of a hot water accumulator?

The size of a hot water accumulator should be determined based on the hot water demand, available space for installation, and the heating system's capacity. It is also important to consider the type of fuel used and the desired temperature of the stored water.

## 4. Can the size of a hot water accumulator be changed after installation?

In most cases, the size of a hot water accumulator cannot be changed after installation. It is important to carefully consider the hot water demand and needs before deciding on the size of the accumulator to avoid any future issues or costly modifications.

## 5. Are there any safety considerations when installing a hot water accumulator?

Yes, it is important to ensure that the hot water accumulator is installed according to safety standards and regulations. This includes proper insulation to prevent heat loss and proper ventilation to prevent the buildup of pressure. It is also important to regularly maintain and inspect the accumulator to ensure safe operation.

### Similar threads

• General Engineering
Replies
3
Views
12K
• DIY Projects
Replies
39
Views
9K
• Mechanics
Replies
3
Views
2K
• Sci-Fi Writing and World Building
Replies
96
Views
6K
• Thermodynamics
Replies
2
Views
36K
• Cosmology
Replies
13
Views
3K
• STEM Academic Advising
Replies
4
Views
2K
• Biology and Medical
Replies
4
Views
3K
• Other Physics Topics
Replies
5
Views
7K
• Sci-Fi Writing and World Building
Replies
2
Views
3K