Central water heater application - heat pump

Central hot water systems are widely used in life today and can be divided into 3 scopes of use as follows:

Central hot water system for households (safe, convenient, energy saving)

Central hot water system for industry and hotels

Central hot water system for swimming pools, spas, resorts.

Comparing using a heat pump with using a water heater, a villa with 5 bathrooms (bathrooms) when using a water heater heated by direct electric resistance will need 5 water heaters (each heater has an electric capacity of 2.5 KW x 5 heaters = 12 KW when in use + 5 switches, 5 circuit breakers, electric cables + installation labor). When using a heat pump (total hot water), only 1 heat pump is needed installed on the roof with an electric capacity of 1.2 KW when using a heat pump, the electric capacity is much less than using a water heater and is safe (because the heat pump operates indirectly like an air conditioner), in terms of convenience when using a heat pump, hot water is always available and provides a large amount of hot water to meet all usage needs.

So using a heat pump to heat the oven is much more energy-saving and safe than using a direct electric water heater.

With such operating principle, the central hot water system is considered simple and convenient. It is a solution to avoid wasting energy resources thoroughly and causing little harm to the environment. Thanks to that, this technology is increasingly widely applied.

When the demand for hot water increases during peak hours, to provide enough hot water, cold water will be supplied directly to the thermal insulation to always have hot water, keep hot water during peak hours, serving the process of continuous water use without having to wait like traditional water heaters. Similar to air conditioners and refrigerators, the operation of a heat pump has the water heating substance pumped through a pressure pump.

There will be heat exchange between hot water and water in the aquarium, then the heat will be conducted back and heated (hot air in) by electric energy sources, oil, or hot gas... then sent to the compressor to continue heating before being sent to the insulation layer.

With such structure, the operating principle is quite simple, water passed through the system is heated by a heating wire, controlled by a sensor relay.

Meet the large demand for many people and many devices such as jacuzzi bathtubs

Energy saving, safe for users, no dangerous electrical problems.

The system can operate long-term, durably, and is a trusted product of many investors today.

Central hot water solution for projects of villas, families, hotels, restaurants, factories...

Suitable for schools, small and medium hotels, resorts, villas... Central water heaters are placed and heated in one location, circulating to create hot water flow exchanging heat with a compressor.

Kahawa's central water heater has outstanding tube-to-tube technology that brings high efficiency in heat exchange and prevents flow turbulence.

The machine uses optimal power to limit waste and can be used at any time. Using a steam heater, you can use it as a heater to replace air conditioners, heaters, heaters, fan heaters, etc. Especially, you can customize the temperature to suit your family, convenient when winter comes (there is an automatic mode and a semi-automatic setting mode according to your needs).

Clack source total filtration system

Schematic drawing of central clean water and hot water supply solution

Video of installing a central hot water and total filtration system for a real project

To install a central hot water system, you need: Heat pump, heat transfer device to heat water; tank, return pump, control cabinet, automatic booster pump, solenoid valve, piping system, connectors, auxiliary equipment and materials:

The most effective is when using a heatpump hot water system combined with a flat panel (solar panel), helping to increase efficiency. This is a new improved solution for the current solar water heater system. Helps the system always ensure the amount of hot water used even when there is not enough light or always ensure the source of hot water used even at night.

Installation of central hot water system for hotels:

Comparing when using a heat pump with using a water heater, a 60-room hotel with 60 bathrooms (bathrooms) when using a water heater heated by a direct electric resistance will need 60 water heaters (each heater has an electric capacity of 2.5 KW x 60 heaters = 150 KW of electricity when in use + 60 switches, 60 atomats, electric cables for 60 water heaters). When using a heat pump (total hot water), only 1 heat pump is needed installed on the roof with an electric capacity of 4-6 KW. When using a heat pump, the electric capacity is much less than using a water heater and is safe (because the heat pump operates indirectly like an air conditioner). In terms of convenience, when using a heat pump, hot water is always available and provides a large amount of hot water to meet all usage needs.

Thus, using heat pump hot water solution saves investment costs in materials, installation labor, saves energy and is safe and meets the need for a large amount of hot water and is safe and convenient.

Clean water and hot water diagram for hotel

Video of installing central hot water system for hotel

Comparing Heatpump and Water Heater – Which is the best solution?

Nowadays, with the development of society and the increasing needs of people, the birth of  the Heat Pump  marks a superior step forward in hot water supply technology. So,  what is a Heat Pump  , how effective is it compared to a traditional water heater? The following article will provide complete information about these two types of devices and help you make the optimal hot water choice for your family and project.

Learn about water heaters. Advantages and disadvantages of water heaters.

Water heater is a household appliance, which has the function of heating domestic water. This is an indispensable device for every family, hotel, school, resort, especially in winter, when the temperature drops, using hot water helps protect human health.

There are two types of water heaters commonly used: direct water heaters and indirect water heaters.

Instantaneous water heaters use heating wires to heat water in a short time without the need for a storage tank. Although they have the advantage of being compact and saving time and electricity, they are not suitable for use when the temperature drops because the hot water produced by this device only fluctuates between 45-55 degrees Celsius.

Indirect water heaters are commonly used in most Vietnamese households. Overcoming the disadvantages of direct water heaters, indirect water heaters operate on the principle of mixing cold water with hot water to create warm water suitable for the user, the temperature can be up to 80 degrees Celsius. However, the capacity of 15 - 30 liters depending on the model still makes the water heater have a large, bulky tank design, causing loss of aesthetics.

Advantages of water heater:

Reasonable price.

– Moderate capacity, suitable for common equipment.

- Convenient installation and maintenance.

Disadvantages of water heaters:

– Using a resistance thermometer directly has the risk of electric leakage.

– For large households or units and facilities such as schools, hotels, resorts, etc., it is necessary to install more tanks to meet usage needs.

– Cost of installing false ceiling, at risk of falling or collapsing

– High power requires many large wires, many switches and circuit breakers.

– Water heater mounted on ceiling, causing loss of aesthetics

What is a heat pump? Advantages and disadvantages of heat pump central water heaters.

Central heat pump water heater is a water heating device that has been widely used in hotels, resorts, swimming pools, and schools in recent years. Operating according to the principle of thermodynamics, the generated heat energy is transferred from one environment to another, the heat can move from "hot to cold" or from "cold to hot".

Advantages of heat pump central water heater system:

– High durability.

– Absolutely safe, no electrical leakage.

– Saves up to 75% energy compared to water heaters.

– Not dependent on weather.

– Environmentally friendly.

– Keeps heat up to 72 hours (with heat loss of about 10 degrees Celsius)

– Large capacity, one system can provide hot water for the entire building.

– Run in automatic mode and according to usage settings

- Convenient and always have hot water, open the faucet and there is hot water (due to the return pump) with a large amount of hot water

Disadvantages:

– High initial installation cost.

– Installation location on the rooftop.

– Not popular with consumers.

Compare heat pump and water heater.

Comparing using a heat pump with using a water heater, a villa with 5 bathrooms (bathrooms) when using a water heater heated by direct electric resistance will need 5 water heaters (each heater has an electric capacity of 2.5 KW x 5 heaters = 12 KW when in use + 5 switches, 5 circuit breakers, electric cables + installation labor). When using a heat pump (total hot water), only 1 heat pump is needed installed on the roof with an electric capacity of 1.2 KW when using a heat pump, the electric capacity is much less than using a water heater and is safe (because the heat pump operates indirectly like an air conditioner), in terms of convenience when using a heat pump, hot water is always available and provides a large amount of hot water to meet all usage needs.

So using a heat pump to heat the oven is much more energy-saving and safe than using a direct electric water heater.

Should I use a water heater or a heat pump?

With outstanding features and advantages, it can be seen that the birth of the Heat Pump central hot water system has solved most of the disadvantages of conventional water heaters. The Heat Pump central hot water system is an effective, long-term, durable solution not only for families but also for projects and constructions with high demand for large capacity, stable, cost-optimized and absolutely safe hot water.

Comparing when using a heat pump with using a water heater, a 60-room hotel with 60 bathrooms (bathrooms) when using a water heater heated by a direct electric resistance will need 60 water heaters (each heater has an electric capacity of 2.5 KW x 60 heaters = 150 KW of electricity when in use + 60 switches, 60 atomats, electric cables for 60 water heaters). When using a heat pump (total hot water), only 1 heat pump is needed installed on the roof with an electric capacity of 4-6 KW. When using a heat pump, the electric capacity is much less than using a water heater and is safe (because the heat pump operates indirectly like an air conditioner). In terms of convenience, when using a heat pump, hot water is always available and provides a large amount of hot water to meet all usage needs.

Thus, using heat pump hot water solution saves investment costs in materials, installation labor, saves energy and is safe and meets the need for a large amount of hot water and is safe and convenient.

Choose the best heat pump central water heater.

Kahawa Heatpump central water heater system is manufactured using modern technology and Japanese standards and is recognized as the world's leading heat pump by:

– The insulation layer retains heat well, equipped with a backup resistor, ensuring there is always hot water in case of an accident.

– Titanium enamel steel layer is absolutely antibacterial.

– Absolutely safe powder coated steel shell.

– High COP coefficient, fast heating, energy saving up to 70%, cost saving.

– High durability, smart operation.

– Simple installation, does not affect the structure of the house.

– Common and economical maintenance and repair.

Notes when choosing and using central hot water system

• Calculate the heat capacity needed to heat
• Calculate the amount of hot water needed according to demand
• Calculate the water flow needed to be heated and supplied for use
• Calculate pressure head,
• Calculate the return pipe route, the return pipe diameter ensures sufficient flow and pressure column.
  Depending on the type of project and purpose of use, we calculate and choose the appropriate Heat Pump capacity. With the aim of ensuring optimal investment costs and operating costs.

Typically, daily hot water consumption at 60°C per capita is calculated as follows:

• Low consumption: 30 liters / person / day.
• Average consumption: 40 liters / person / day.
• High consumption: 60 liters / person / day.

For example: A family of 5 people, the average hot water consumption is 40 liters / person / day. The total hot water demand of the whole family is: 5 x 40 = 200L / day.

With a capacity of about 200 liters per day, you can choose to install a small capacity central water heater system and 200 liter capacity components.

For hotels, in buildings such as hotels, the hot water demand is related to the number of guests. In this case, the daily consumption is calculated based on the average capacity of the rooms. Using this basis, the size of the proposed installed machine is determined. Here we calculate the average hot water demand of 40 liters per day per person.

For example, a hotel has 25 rooms, each room has an average of 2 people. So on average, the hotel uses 40 x 25 x 2 = 2000 liters of hot water per day. At this time, we use this 2000-liter hot water tank and use a 5HP Heat Pump water heater.

Installation of supply and return pipes for central hot water system:

To ensure that hot water is available immediately when the faucet is opened, the return water line must be designed and constructed with heat-insulating insulation.

The system operates efficiently and saves energy

Many times when installing a central hot water system, a hot water circulation piping system is not installed.

Hot water is not always used in the home. Therefore, the water in the pipes will gradually cool down after 2-3 hours of non-use.

To get hot water, you have to drain all the cold water in the pipes before you can use hot water. This is time consuming and wastes a large amount of clean water.

Installing a recirculating water system and a temperature sensing valve will automatically return cold water in the pipes back to the Heat Pump for reheating. It helps to maintain a stable high temperature in the pipes. 

High system durability, no need to worry about tank burning like traditional water heaters.

Low system operating costs, helping to save costs

High efficiency helps save 70% - 80% electricity

Free heat source, environmentally friendly

High efficiency and energy saving: using this type of water heater also limits energy waste. To heat the steam, you can use devices such as heaters, air conditioners, fireplaces, fan heaters, etc. In the summer, the system will create cool steam to replace the air conditioner and can customize the temperature to suit the family, convenient for the winter.

Installation and disassembly of the systems are simple, so when changing the house design, there is no fear of buying a new system or damage.

With high efficiency heat exchange tube technology, saving electricity and preventing flow turbulence.

Please contact the engineer for advice and quotation Hotline / Zalo: 0907 688 569

See also: