Abstract
Although the direct cooling to air-conditioning by cooling towers (DCCT) could be practice and energy saving in northwestern area of China due to dry climate, especially it’s nearly six months that the outdoor wet-bulb temperature is less than 6 ℃ in Lanzhou area, and few practical examples can be found. To provide the reference about this, the calculation and analysis about DCCT in Lanzhou area were done to obtain some operating parameters firstly. And then, based on which, a retrofitting work transforming cooling towers attached to the air-conditioning system of a hotel with a large inner zone in Lanzhou to DCCT was carried out, whose energy-saving rate is 84.7% and investment recovery period is about 0.32 years. The paper could be valuable for the practical application of DCCT in Lanzhou area.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Abbreviations
- A :
-
Area (m2)
- C P :
-
Specific heat of spray water (J kg−1 K−1)
- C L :
-
Specific heat of cooling water (J kg−1 K−1)
- F o :
-
Coil area (m2)
- G a :
-
Air flow rate (kg/h)
- h :
-
The enthalpy of air (kJ/kg)
- h P :
-
Enthalpy of saturated air corresponding to spray water (kJ/kg)
- K o :
-
The heat transfer coefficient (kW/m2 K)
- K m :
-
The mass transfer coefficient (kg/m2 s)
- L :
-
Water flow rate (kg/h)
- Q :
-
Cooling load (kW)
- s :
-
The length of heat exchanger coil
- t :
-
The temperature of air (℃)
- T :
-
The temperature of water (℃)
- t d :
-
The dry-bulb temperature (℃)
- t w :
-
The wet-bulb temperature (℃)
- a :
-
Air
- i :
-
Inside or inlet
- L :
-
Cooling water
- o :
-
Outside or outlet
- P :
-
Spray water
References
Li, L.: An adaptive research for water-side free cooling in Guizhou. Guizhou University, China (2018)
Hu, G., Zhang, W.: Energy saving analysis of tower cooling system for a hotel building in Changsha. HVAC 47(07), 63–66 (2017)
Meteorological Information Room of China Meteorological Administration, Tsinghua University. Special meteorological data set for China building thermal environment analysis. China Construction Industry Publishing house (2005)
Parker, R., Treybal, E.: The heat and mass transfer characteristics of evaporative coolers. Chem. Eng. Prog. Symp. 57(32), 139–149 (1961)
Hasan, A., Siren, K.: Performance investigation of plain circular and oval tube evaporatively cooled heat exchangers. Appl. Therm. Eng. 24(5–6), 777–790 (2004)
Li, Y.: Closed Cooling Tower for Air-conditioning. China Building Industry Press, China (2008)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Wang, X., Zhou, W., Zhao, L., Bao, X., Zheng, L., Han, X. (2020). Applied Analysis of the Direct Cooling by Cooling Towers in Lanzhou Area. In: Wang, Z., Zhu, Y., Wang, F., Wang, P., Shen, C., Liu, J. (eds) Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019). ISHVAC 2019. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-9524-6_27
Download citation
DOI: https://doi.org/10.1007/978-981-13-9524-6_27
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-9523-9
Online ISBN: 978-981-13-9524-6
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)