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  2. DART – Direct Adiabatic Room Air Humidification with Droplets DART – Direct Adiabatic Room Air Humidification with Droplets

DART – Direct Adiabatic Room Air Humidification with Droplets

In this project, a new type of decentralized room air humidification system was developed.

Brief information

School:

Engineering and Architecture

Status:

Completed

Period:

01.09.2008 - 31.12.2010

Overview

In this adiabatic system, water is directly atomized into the room via spray heads that are placed on walls or on the ceiling. The goal is the development of a visually and acoustically inconspicuously operating and energy efficient humidification system. Adjacent surfaces must not be moistened through the atomization. Furthermore, due to the introduction of minerals in the atomized water, the particle concentration in the room air must not exceed specific limits. The physical processes during the atomization of the water and the subsequent evaporation are examined theoretically and experimentally with the help of LDA/PDA laser measuring technology.

Simulations and observations showed that droplets evaporated completely after a sufficiently short distance. The humidification with raw water is technically feasible and the increase of the number of particles and the mass concentration in the room air is within the tolerance range. In order not to increase the particle contamination in the room air, water treatment is recommended. Basically it can be shown that direct adiabatic room air humidification works and is advantageous in comparison to conventional humidification systems. 

Sprühkegel einer Düse., © Hochschule Luzern - Technik & Architektur
Bestimmung der Tropfengrösse und Tropfengschwindigkeit mit LDA/PDA-Lasermesstechnik., © Hochschule Luzern - Technik & Architektur
Lasermesssystem der Hochschule Luzern - Technik & Architektur, © Hochschule Luzern - Technik & Architektur
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Facts

Type of project

Forschung

Internal organisations involved
  • CC Thermal Energy Systems and Process Engineering
External project partner
  • Walter Meier (Klima Schweiz) AG
External project funder
  • Kommission für Technologie und Innovation (KTI)
Funding
  • KTI-HSLU als Hauptgesuchsteller/in
  • Private / Stiftungen
  • Forschungsfinanzierung allgemein
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Persons involved: internal

Project manager
  • Beat Wellig

Brief information

School:

Engineering and Architecture

Status:

Completed

Period:

09/01/2008 - 12/31/2010

Project Head

Prof. Dr. Beat Wellig

Lecturer

+41 41 349 32 57

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