區域供暖

District heating, also known as heat networks or campus heating, is a system that transports heat to residential and commercial buildings through insulated pipes. This heat can come from a variety of traditional and green sources like combined heat and power, energy for waste, geothermal, solar thermal, and waste heat recovery. Alfa Laval’s energy efficient plate heat exchangers can support all district heating processes, reducing carbon emissions and demand for primary energy at the same time.

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Choose the right district energy partner

  • With millions of heat exchangers in operation within the industry worldwide and service centers covering all markets, Alfa Laval has a proven record.
  • We understand the importance to scale up the use of renewable energy, increase heat recovery and have a strong focus to aid customers and partners.
  • Our product range covers everything from heat generation in production facilities, to heating the water in your shower.
  • And, with AHRI third-party performance certification, you can rest assured that the thermal performance of our products is as good as we say it is.
  • As one of our biggest markets, research and development in district heating is high on our agenda and we are creating with you in mind.

Trends in district heating industry

Today, the heating sector is influenced by multiple trends. These trends are mainly driven by increased expectations and targets in decarbonization, energy supply security and energy affordability, customer usability, and energy-efficient performance.

Some of the focused trends in the district heating sector are:

  • Low grid temperature. Newly built grids for low temperature or existing grids where operating temperatures are being lowered
  • Energy sources: changing fossil fuels to renewables and recycled energy
  • Centralized production is complemented by decentralized/local production
  • New flexible solutions in terms of supply and network size
  • Trend in the sector to work more long-term with investments, digitalization and asset management
  • Extended involvement and interaction with the end user to work with energy efficiency and reuse heat. Some customers can be viewed as “Prosumers” – both consumers and producers – not only using but also delivering energy to the grid at times.
Recovering industrial waste heat with heat exchangers and using it for district heating is one of the most effective ways to improve energy efficiency on a global scale. The Aurubis Group has taken this very approach to improve sustainability in one of their smelters.

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District heating from first to fifth generation

Alfa Laval has a wide range of special heat exchangers developed for the HVAC market and we have been working actively with the district energy sector for more than 70 years.

Heat exchanger have played a vital role in district heating systems from the start of generation 1 technology and the importance of their functionality are increasing for the new generations of district heating, district heating generation 4 and generation 5.

Together with consultants, system builders, energy companies and our partners we are driving the transformation of the energy landscape. We are proud to be change agents in this energy transition. Do not hesitate to contact your local Alfa Laval office to hear more about the solutions of tomorrow.

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District heating generations - From first generation steam grids to fifth generation low temperature grids with distributed heat pumps. Temperatures are decreasing and the efficiency of the systems are increasing.

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Alfa Laval Solutions in District heating

In the district heating industry Alfa Laval is supplying heat transfer solutions for energy generation and for substations connecting buildings to the distribution network. Low return temperature increases the efficiency of the total district heating system and should always be the main target for any grid operator.

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Production

1. Energy Generation in transformation

Alfa Laval heat exchangers are used to extract heat from the source. The trend is going towards more renewable energy, recovery of excess heat from new energy sources like data centres. And some energy companies are exploring the possibilities of green hydrogen.

2. Heat pumps are used by district heating operators turning excess heat at low temperatures into an affordable and sustainable heat source

Alfa Laval heat exchangers are also used in heat pumps of all different sizes. Heat pumps can be used in connection with for example a wastewater treatment plant to generate energy for a district energy network. A heat pump can also be located in a commercial building reusing the heat from for example a restaurant or a smaller data center locally. In many installations in heat-efficient buildings, the heat pump is used to produce both heating and cooling depending on the needs.

Distribution

Grids

In some locations heat exchangers are used as pressure breakers in extensive networks with height-related issues and altitude differences. This can be when interconnecting city-scale networks or large distribution grids coming from a production facility located, sometimes far away, and at a higher altitude than the city using the district heating. The heat exchangers will work as pressure breakers in these applications.

Heat exchangers are mainly used as pressure breakers in substations. Either in substations between the main network and a secondary network or from the distribution network to each building.

A secondary heating network enables low-temperature systems, where the incoming water to the end users can be of a lower temperature than the primary grid. With low-temperature systems, an entire area can receive heat from a shared heat substation.

Demand

End User

Heat exchangers are one of the main components in district heating substations at the end user/building level.

Heat exchangers are needed for two main reasons. Firstly, they are used to isolate and protect the individual building's heating system and users from the potentially higher pressure and temperature available in the main distribution network. Secondly, it is a way to limit the amount of damage one could incur if there is a leak inside a building's heating system as the pressure breaker ensures that there is a limited amount of heating water in the isolated heating circuit.

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墊片式板式熱交換器

  • 靈活度高,可適應任何工作任務,確保最高的熱效率
  • 精巧的設計節省空間,易於維護和保養
  • 有效減少結垢、壓力和腐蝕,最大限度地延長正常運行時間

 

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半焊可拆板式熱交換器

  • 高效可靠的技術,適用於各種因壓力或temperature fatigue而困擾的應用
  • 獨特的Alfa Laval RefTight™密封系統,保證更長的生命週期
  • 防止介質間的交叉污染,可靠的解決方案

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銅焊式板式熱交換器

  • 輕量級的銅銲接結構,佔地面積小
  • 相較於殼管式熱交換器具有更高的熱效率
  • 適配性高,適用於各種介質/流體的各種應用
  • 非常適用於天然和低GWP制冷劑

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擴散焊全不鏽鋼AlfaNova熱交換器

  • 100%不銹鋼結構
  • 良好的耐腐蝕性,適配度高
  • 有效防止飲用水和其他衛生應用中的金屬污染
  • 熱效率高和佔地面積小

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顧問?系統整合商?

顧問們請不要錯過,憑藉在熱交換業界數十年的經驗,阿法拉伐為當今的供暖和降溫挑戰提供了豐富的知識底蘊。您可以在阿法拉伐找到關於能源效率以及天然冷媒等方面的複雜問題的解答,幫助您更輕鬆地找到適合應用的技術工具。

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AHRI認證的熱交換器,確保可靠熱性能

我們取得全球對熱性能的AHRI(空氣調節、暖氣和冷凍協會)第三方驗證的認證,為您提供獨立保證,確保板式熱交換器將按照製造商公布的性能指標執行。阿法拉伐提供經過AHRI認證的墊片式板式熱交換器、銅焊式板式熱交換器和擴散焊全不鏽鋼板式熱交換器。

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設備效能,歷久彌新

效能不佳的熱交換器,將對現場安全、產品品質和能源成本有負面影響。設備故障可能會導致代價高昂的非預期性停機和重大的生產損失。藉由定期檢測和主動維修保養,讓您可安心使用設備,輕鬆掌握運轉狀況。

板式熱交換器服務總覽

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數位化提升能源效益

智慧城市和數位智商有助於城市實現70%的永續發展目標。數位服務已經對城市的供暖和降溫系統帶來了顯著影響,向永續邁出一步。

啟用遠程監控並執行專用分析可實現更精確高效的營運、更明智的決策以及更有針對性的干預措施。唯有通過數位轉型才能發展更複雜高效的供暖和冷卻系統,可以為城市區域提供可靠且可負擔的供暖和降溫服務,同時一併減少溫室氣體排放。

The Smart Heat Exchanger

暖通空調和永續城市

城市消耗了全球超過三分之二的能源,想要緩解氣候變遷,落實永續城市是關鍵。具統計,城市中多數的能耗用於供暖製冷。換言之,提升暖通空調的能效與永續城市目標息息相關。Alfa Laval承諾在2030年前達到碳中和,以身作則並將經驗與產業各界共享,一起邁向永續城市。

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