Superior life cycle cost for district energy systems.
Compact, reliable and efficient heating and/or cooling of homes, offices, schools and hospitals, with a low carbon footprint. Proven in millions of installations worldwide. Why wait? There are only advantages to be had.
Efficient heating of homes
Efficient cooling of buildings
SWEP heat exchangers in Hysopt software
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Many cities around the world with cooler climates are benefiting from district energy systems delivered through heat networks. The technology for this is relatively simple: hot water supplied by one or several centralized plants, is transported through a piping system to provide heating where it is needed - homes, offices, hospitals schools and factories. District heating systems provide a number of benefits that include lower carbon footprint and low lifecycle cost.
Radiators, connected to a central heat source, such as a condensing boiler, are designed to heat the air in the room using convection to transfer heat from the radiators to the surrounding air. This will be done by drawing in heated water through connecting pipes, which is then pumped to each radiator in the building.
Most underfloor heating systems use the principles of radiant heat to transfer radiant energy from an emitting heat source, typically a boiler or hot-water heater. Warm water flows through a heat exchanger located underneath the floor. It is used in a wide range of buildings, from apartment blocks and houses to large offices and other commercial premises.
There are two types of system, centralized, meaning a central heating unit that is typically installed in the basement of larger buildings and used to heat water distributed to all users in the building, and de-centralized, meaning a heat exchanger is installed in each building across a development, so that each apartment or office has its own individual supply.
The heat exchanger acts as a link between the base unit and the residential or industrial/commercial building sub-stations and can be arranged in either a traditional parallel or 2-Stage set-up. SWEP 2-stage brazed plate heat exchanger units that drive such systems combine a preheater and an afterheater. This enables returned water from the radiator circuit heat exchanger to be used to preheat water intended for domestic use.
In cities with hotter climates, district energy systems are used to deliver cooling. As with district heating, the technology to deliver this is relatively simple. Cooling energy in the form of cold water is produced centrally and transported to customers via a closed circuit. And again as with district heating, this can be achieved with decreased carbon footprint, cost efficiently and reliably.
District Cooling delivers chilled water to buildings like offices and factories. Cooling energy in the form of cold water is produced centrally and transported to users via a closed circuit. Such systems are highly reliable and cost effective, with low running and maintenance costs, with hazardous substances such as refrigerants removed at source.
These are used in taller buildings and enable chilled water to overcome pressure to reach high level cooling units. Heat exchangers are installed at regular intervals (eg. every ten or fifteen floors) between the ground and top floors of the building, providing a ‘link’ from the central chiller. Pressure breakers have a similar design as sub-station BPHEs used in District Heating systems.
Free cooling is an economical method of using low external air temperatures to assist in chilling water, which can then be used for industrial processes, or air conditioning systems. The chilled water can either be used immediately or stored for the short- or long-term. A heat exchanger is placed as an intermediary between the cooling source and the cooling unit. The main uses are for air-conditioning and process cooling. Ice Storage is similar, with ice produced and then used for cooling during the day. The set-up is similar to Free Cooling.
BPHE designs with Hysopt
Heat exchangers play a crucial role to the transfer of heat from the heat network into our buildings. Designers working with Hysopt are now able to select SWEP heat exchangers within their digital model and the Hysopt software will automatically select the most optimum heat exchanger and hydraulic components of the entire system.
Selecting the best heat exchanger in the design phase will help you to design energy-efficient installations with optimised design volume flow, return temperature and pressure drop performance, that yield long-term benefits and reduced capital expenditure (CAPEX) and operating expenses (OPEX).
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