概述
Almost all the electrical energy a compressor consumes turns into heat. In most plants that heat is thrown away through a cooler and, in air-conditioned buildings, paid for a second time to remove it.
A heat recovery package puts a heat exchanger in the cooling circuit and gives you hot water at 70 – 90 °C instead. On a water-cooled oil-free machine, up to 94% of the input energy can be recovered, because there is no oil circuit to complicate the heat path.
主要优势
Up to 94% recovery
On water-cooled two-stage oil-free machines, most of the input energy comes back as usable hot water.
Real payback
Where the site already burns gas or diesel for process hot water, payback is often under two years.
Retrofittable
Can be added to installed Green Air oil-free machines without replacing the compressor.
No contamination risk
Double-wall heat exchangers available where the recovered water touches a food or pharma process.
工作原理
压缩机消耗的电几乎全部以热的形式离开它。热回收并不创造什么，它只是在热量往外走的路上把它接住，放到有用的地方去，而不是放进机房。
在无油机上，热量取自中间冷却器和后冷却器——那里空气最热，换热也最干净。中间没有油路，所以水侧不会被污染。
您拿回来的是最高九十度的热水；正是这个温度让它能用于清洗、工艺加热和给锅炉补水，而不是仅仅把一间屋子烘暖。
- 最高可回收百分之九十的输入能量
- 最高九十度的热水
- 热量取自中间冷却器与后冷却器
- 空气与水之间没有油路
- 既可用于新机，也可加装到现有机器
- 板式换热器或管壳式换热器
- 机房也会因此更凉快
- 投资回收期通常以月计
在您的工厂值不值得做
问题不在于热量在不在那里，而在于您有没有地方用它。一个本来就要买热水或蒸汽的工厂，答案是现成的；一个没有这类需求的工厂，就不该被卖这套东西。
我们按您的运行小时、压缩机功率，以及您目前为热水所烧燃料的成本来算。如果账算不过来，我们会直说。
第二项好处常被忽略。通过回收回路带走的热量，就是机房通风不必再排走的热量——在海湾的夏天，仅这一项本身就值钱。
- 按您的运行小时与燃料成本测算
- 需要现有的热水或采暖需求
- 在您决定之前先把账摆出来
- 机房冷却负荷同时下降
- 可加装到已安装的机器上
- 加装计量，节省是实测出来的，不是宣称的
- 按您的需求量选型，不是按压缩机
- 由我们自己的团队安装
配件与服务
一套回收回路无非是一台换热器、一台泵和一些控制元件。需要照看的是换热器，而决定照看频率的是水质。
结垢会悄悄降低回收量。什么都不会坏，只是水没那么热了；没有计量表，就没有人会注意到节省已经没有了。
我们在每次保养时记录回收的能量，以此证明这套系统仍在做当初买它时所要做的事。
- 换热器清洗列入保养计划
- 每次到场都检查水质
- 回收能量经计量并记录在案
- 含泵与控制元件保养
- 与压缩机在同一次上门中一并保养
- 配件本地有库存
- 每次保养后提供性能报告
- 服务方案下固定价格
常见问题
How much heat can I actually recover?
Up to 94% of the electrical input on a water-cooled oil-free machine, because there is no oil circuit complicating the heat path. Air-cooled machines recover less.
What temperature water do I get?
70 to 90 °C, which is hot enough for boiler feed pre-heating, clean-in-place water and most process washing duties.
How much hot water is that in practice?
As a guide, a 75 kW compressor running loaded delivers roughly 1,100 litres an hour raised by 40 °C. We calculate your figures from actual running hours and inlet water temperature.
When does it pay back?
Usually under two years where the site already burns gas or diesel for process hot water. Where there is no hot water demand there is nothing to recover into and it does not pay at all.
Can it be added to a machine I already have?
Yes, if it is a Green Air oil-free unit. The heat exchanger goes into the cooling circuit without replacing the compressor.
Is there any contamination risk to my process water?
Double-wall heat exchangers are available where the recovered water touches food or pharmaceutical processes, so a single failure cannot cross-contaminate.
Does it affect compressor performance?
No, provided the recovery circuit is sized correctly. The compressor still needs to reject its heat. Recovery just sends it somewhere useful instead of a cooling tower.
What happens in summer when I do not need the heat?
The system switches back to the normal cooling circuit automatically. You are not obliged to take the heat when there is no demand for it.
Which industries benefit most?
Textile dye houses, dairies, food processing and anywhere with clean-in-place hot water. Plants that already have a continuous thermal demand.
Do you do a feasibility study first?
Yes, we measure the available heat and the required sink before quoting, because the answer is sometimes that it will not pay on your site.
相关产品
水润滑无油空压机
用水代替油来密封和冷却转子。Class 0 空气，5.5 至 160 kW。
- 容积流量（FAD）
- 0.3 – 27.0 m³/min
- 工作压力
- 7 – 10 bar g
- 电机功率
- 6 – 160 kW
无油涡旋空压机
安静、小巧、真正无油。7.5 至 37 kW，8 bar g。
- 容积流量（FAD）
- 0.8 – 4.0 m³/min
- 工作压力
- 8 bar g
- 电机功率
- 8 – 37 kW
无油螺杆空压机
Class 0 空气，压缩腔内任何位置都没有油。
- 容积流量（FAD）
- 0.3 – 6.9 m³/min
- 工作压力
- 5 – 10 bar g
- 电机功率
- 15 – 37 kW
双级无油空压机 37 – 75 kW
两级压缩加中间冷却，每立方米耗电更低。
- 容积流量（FAD）
- 5.1 – 12.7 m³/min
- 工作压力
- 7 – 10 bar g
- 电机功率
- 37 – 75 kW
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