Comparative study of the performance of the M-cycle counter-flow and cross-flow heat exchangers for indirect evaporative cooling – Paving the path toward sustainable cooling of buildings

Energy ◽  
2011 ◽  
Vol 36 (12) ◽  
pp. 6790-6805 ◽  
Author(s):  
Changhong Zhan ◽  
Zhiyin Duan ◽  
Xudong Zhao ◽  
Stefan Smith ◽  
Hong Jin ◽  
...  
Keyword(s):  
Comparative Study ◽  
Heat Exchangers ◽  
Evaporative Cooling ◽  
Cross Flow ◽  
Counter Flow ◽  
Flow Heat ◽  
Indirect Evaporative Cooling

Numerical study of a M-cycle cross-flow heat exchanger for indirect evaporative cooling

2011 ◽  
Vol 46 (3) ◽  
pp. 657-668 ◽  
Author(s):  
Changhong Zhan ◽  
Xudong Zhao ◽  
Stefan Smith ◽  
S.B. Riffat
Keyword(s):  
Heat Exchanger ◽  
Numerical Study ◽  
Evaporative Cooling ◽  
Cross Flow ◽  
Flow Heat ◽  
Indirect Evaporative Cooling

scholarly journals Comparative Study of the Cross-Flow Heat and Mass Exchangers for Indirect Evaporative Cooling Using Numerical Methods

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3374 ◽  
Author(s):  
Yugang Wang ◽  
Xiang Huang ◽  
Li Li
Keyword(s):  
Numerical Methods ◽  
Comparative Study ◽  
Flow Rate ◽  
Air Flow ◽  
Evaporative Cooling ◽  
Cross Flow ◽  
Air Flow Rate ◽  
Cooling Performance ◽  
Indirect Evaporative Cooling ◽  
The Cross

This paper presents a comparative study of the cross-flow regenerative heat and mass exchanger (HMX) and the conventional cross-flow HMX for indirect evaporative cooling (IEC) with numerical methods. The objective of this study is mainly to clarify the applicability of the two HMXs. The numerical model was built and validated by existing experimental data. The difference in heat and mass transfer between the two HMXs was revealed by analyzing the change of the temperature and moisture content of the air, and the influence of the main operating parameters on the cooling performance of the HMXs was analyzed. In the typical operating conditions, when the HMXs are used alone, the cooling performance of the regenerative HMX is better than that of the conventional HMX under low supply air flow rate. When the HMXs are used in the multistage evaporative cooling systems with high supply air flow rate, the conventional HMX is more suitable as the first stage of the system to pre-cool the supply air, while the regenerative HMX is more suitable as the second stage to re-cool the supply air.

Performance investigation of a M (Maisotsenko)-cycle cross-flow heat exchanger used for indirect evaporative cooling

Energy ◽  
2014 ◽  
Vol 76 ◽  
pp. 593-606 ◽  
Author(s):  
Sergey Anisimov ◽  
Demis Pandelidis ◽  
Andrzej Jedlikowski ◽  
Vitaliy Polushkin
Keyword(s):  
Heat Exchanger ◽  
Evaporative Cooling ◽  
Cross Flow ◽  
Flow Heat ◽  
Indirect Evaporative Cooling

Thermal Efficiency of the Cross Flow Heat Exchangers

2006 ◽  
Author(s):  
Ahmad Fakheri
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Rate ◽  
Heat Exchangers ◽  
Transfer Rate ◽  
Cross Flow ◽  
Algebraic Expression ◽  
Counter Flow ◽  
Optimum Heat ◽  
Flow Heat

The heat exchanger efficiency is defined as the ratio of the actual heat transfer in a heat exchanger to the optimum heat transfer rate. The optimum heat transfer rate, qopt, is given by the product of UA and the Arithmetic Mean Temperature Difference, which is the difference between the average temperatures of hot and cold fluids. The actual rate of heat transfer in a heat exchanger is always less than this optimum value, which takes place in an ideal balanced counter flow heat exchanger. It has been shown that for parallel flow, counter flow, and shell and tube heat exchanger the efficiency is only a function of a single nondimensional parameter called Fin Analogy Number. The function defining the efficiency of these heat exchangers is identical to that of a constant area fin with an insulated tip. This paper presents exact expressions for the efficiencies of the different cross flow heat exchangers. It is shown that by generalizing the definition of Fa, very accurate results can be obtained by using the same algebraic expression, or a single algebraic expression can be used to assess the performance of a variety of commonly used heat exchangers.

Exergy Transfer Effectiveness on Heat Exchanger

2006 ◽  
Author(s):  
Shuang-Ying Wu ◽  
Xiao-Feng Yuan ◽  
You-Rong Li ◽  
Wen-Zhi Cui ◽  
Liao Quan
Keyword(s):  
Heat Transfer ◽  
Heat Capacity ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Cross Flow ◽  
Counter Flow ◽  
Temperature Heat ◽  
Relevant Variables ◽  
Flow Heat ◽  
Exergy Transfer

In this paper, the concept of exergy transfer effectiveness is put forward firstly and the expressions involving relevant variables for the exergy transfer effectiveness, the heat transfer units number and the ratio of cold and hot fluids heat capacity rate have been derived for the high and low temperature heat exchangers. Taking the parallel flow, counter flow and cross flow heat exchangers as examples, the numerical results of exergy transfer effectiveness are given and the comparison of exergy transfer effectiveness with heat transfer effectiveness is analyzed.

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