Study On The Impact Of Floor And Wall Heating Air Conditionin G On Thermal And Humid Environment Of Typical Office

Building air conditioning energy consumption accounts for about55%of the total energyconsumption, but more so with the air conditioning energy consumption of office building. Thepopularization and application of air conditioning technology make people realize the expectationsof summer cooling and winter heating, but with the development of social economy, more andmore people pursue comfortable office environment, the rule study on of the change of internal heatwet environment and air flow organization is particularly important to in air conditioning room.Through literature research analysis, two experiment rooms building with6.24m×4.28m×4.28m were built, in which arrange a group of bookcase, a desk, three chairs and other officefurniture, install Fission floor air conditioning in one room， and fission wall-mountedair-conditioner in another. Considering the influence of air conditioning temperature Settings,humidification conditioning and natural ventilation, the change rule of hot wet environment of thehorizontal plane with Z=1.0m by different split type air conditioning in heating mode was studied.The experimental analysis shows:(1) when the air conditioner run at26℃, the heating rate of Aoffice air conditioning is0.28℃/min from operation to the first peak of the average temperature,and the heating rate of B office is0.12℃/min; Reducing setting temperature of air conditioning, inthe relatively stable indoor temperature stage, two office temperature are with the same drop range,and with almost1℃drop in air conditioning setting temperature, indoor average temperaturedrops0.6℃. The impact of thermal pressure ventilation is much smaller than combined action ofwind pressure and hot-press on the reduction of indoor temperature, and the influence of ventilationon indoor temperature is better than the outside air temperature.(2)Under the doors and windowsclosed, the relative humidity is lower than the standard requirements after the air conditioningrunning stability, and after adding a humidifier, average relative indoor humidity is more than35%,which can make the person feel comfortable. Fission air conditioning has obvious dehumidificationfunction, through experiment contrast analysis, we can find that the dehumidification ability offloor type air conditioner is better than a wall-mounted air-conditioner. Turn off air conditioningand humidifier and open a window, indoor relative humidity will increase, and directly open twowindows, regardless of high and low relative humidity outdoor, indoor relative humidity willreduce firstly and then rise.Based on the experiment, the physical model is established by use of PHOENICS software inCFD, by setting different air conditioning supply air flow rate with0.15m3/s,0.15m3/s and 0.25m3/s, and different air supply temperature of35.0℃,37.5℃and35.0℃to form nine differentworking conditions, the law of vertically temperature distribution and air flow organization wereanalyzed. The simulation conclusions are as follows:(1) Two types of split type air conditioning inheating mode has a certain difference in indoor temperature control, the greater size of air supplyoutlet, the better heating effect of indoor temperature with the same delivery and supply airtemperature.(2) In the vertical direction, the temperature difference between Z=1.0m and Z=0.1mis small in the case of smaller supply air temperature and moderate air flow with0.20m3/s.(3)Indoor air flow is mainly affected by send air volume and air buoyancy lift size, and thetemperature of air supply outlet has small influence on air flow.