Desiccant Cooling System (DCS)

Revision as of 20:18, 28 February 2017 by Admin (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)


[edit]
Description Unlike conventional HVAC systems, sorption cooling systems do not require an external cooling source for cooling and dehumidification of the air. Conventional HVAC systems are systems that supply mechanical energy (compression cooling) whereas sorption cooling machines use heat as energy source. The efficiency of both systems is comparable.

Traditionally, the technology is used in the process industry (e.g. in breweries or for food production) to ensure the refrigeration supply in the production. Five main components are necessary to run a sorption cooling system. Condensor, evaporator, expeller (also named reactor or generator), absorber and pump. Depending on the mode of binding the water vapor – there is a distinction between absorption (continuous cooling is possible) and adsorption (nearly continuous cooling possible). In both cases the air is dehumidified and cooled by the release of latent heat. The technology is available with solid (adsorption cooling) and fluid (absorption cooling) absorbers. Both are hygroscopic materials. The water vapor contained in the air is removed from the air stream due to the difference in the partial pressure. In parallel the temperature of the air and thereby the room temperature is reduced.

Advantages
  • High efficiency
  • More eco-friendly than conventional HVAC systems
  • Low investment and operating costs
  • Sorption cooling systems with fluid absorbers: Sorption and generation can be separated, due to the separate storage of the two fluid materials
  • Energy for regeneration could be provided by solar energy
Disadvantages

Adjustment necessary for certain buildings, climatic conditions and occupancy

Characteristic features

Needs to be adjusted to suit frame conditions

Application barriers

No sorption coolers known that are used for any building facilities

Information sources http://planck.caltech.edu/coolers.html
http://ecn.nl/nl/nieuws/newsletter-en/archive-2008/march-2008/topmacs/
Image
Trade: Building services
Parameter Minimal Value Maximal Value Unit
Nominal Power Input

0,05

2

kW

EER

N/A

N/A

Water Flow Rate

3

80

l/h

Air Flow Rate

600

15000

m3/h

Sound Power Level

dBA

Sound Pressure Level

dBA

Operating Temperature Range

25

N/A

°C

Dimensions

mm

Weight

kg

Cooling Capacity

1

100

kW

COP

N/A

N/A

COP Annual Degradation Rate

N/A

N/A

%

Investment Cost

3500

200000

Operational Cost

50

2000

€/year

Replacement Cost

100

1000

€/year

Life Expectancy

10

>25">25" cannot be used as a page name in this wiki.

years

Deterioration Description
Causes
Parameter
Degradation Rate
Measurement


The Design4Energy project aims to address evolutionary life-cycle evolutionary design methodology able to create energy-efficient buildings flexibly connected with the neighbourhood energy system. BrokenWall.JPG
BL(Ti)=0.788
Equation.JPG


pCghffhfhart