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Scientia Silvae Sinicae ›› 2018, Vol. 54 ›› Issue (11): 73-78.doi: 10.11707/j.1001-7488.20181111

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The Concentration of Formaldehyde and VOC Released from Running Multi-Layer Parquet for Ground with Heating System

Zhu Ke1, Du Guangyue2, Zheng Huanqi2, Zhou Yucheng2   

  1. 1. School of Thermal Engineering, Shandong Jianzhu University Jinan 250101;
    2. School of Information and Electrical Engineering, Shandong Jianzhu University Jinan 250101
  • Received:2018-04-02 Revised:2018-07-31 Online:2018-11-25 Published:2018-12-04

Abstract: [Objective] This study focus on a radiant ground with heating system using multi-layer parquet. The indoor temperature and humidity variations, and the concentrations of formaldehyde and volatile organic compounds (VOC) are measured and analyzed in order to provide experimental result for indoor environment quality control of multi-layer parquet for ground with heating system, and as also to provide references of quality standards for multi-layer parquet which is used for ground heating purpose.[Method] A 36 m2 room is used to install the radiant ground heating system. The heat carrier fluid is flowing through pipes under the multi-layer parquet floor and the whole system was running under standard conditions. During the entire heating period of the experiment, the outdoor temperature, temperature of supplying water, indoor temperature and humidity, and the formaldehyde and VOC concentrations were measured at certain time intervals. Based on the recorded data, the differences of temperature distribution and the concentration of formaldehyde and VOC released from multi-layer parquet were analysed. The principle and impact factors of pollutants releasing from multi-layer parquet floor were also discussed.[Result] The result showed that, the initial room temperature was 14.6℃ and the background concentrations of formaldehyde and VOC were 0.01 mg·m-3 and 0.50 mg·m-3, respectively. The temperature of supplying water was firstly set at 40℃. The room temperature increased to 20.3℃ after 50 h of heating, and the concentrations of formaldehyde and VOC increased to 0.04 mg·m-3 and 0.70 mg·m-3, respectively. The peak concentrations, which are 0.05 mg·m-3 and 0.86 mg·m-3, appear on the 20th day of the experiment. When the temperature of supplying water was set at 50℃, the room temperature increased to 24.2℃ after 50 h, and the formaldehyde and VOC peak concentrations are 0.11 mg·m-3 and 1.01 mg·m-3 respectively. At the end of the heating experiment, the corresponding reduced to 0.03 mg·m-3 and 0.72 mg·m-3 separately.[Conclusion] During the running period of ground with heating system, the release of formaldehyde and VOC from the multi-layer parquet has a positive correlation to the indoor air temperature and humidity, and influenced by the system running mode and outdoor environment. When the room is insulated and the system is running with high water temperature, the indoor VOC concentration might exceed the standard and the windows need to be open. The result of this study could be used to guide the use of multi-layer parquet for ground with heating system and also as a reference of formaldehyde and VOC release limit standards for such kind of system.

Key words: floor for ground with heating system, multi-layer parquet, volatile organic compounds (VOC), formaldehyde release

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