Pre-cooling with Munters media to improve the performance of Natural Draft Dry Cooling Towers

He, Suoying; Gurgenci, Hal; Guan, Zhiqiang; Alkhedhair, Abdullah M.

doi:10.1016/j.applthermaleng.2012.12.033

Cited by 74 publications

(49 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3. Precooling technology [40] and preheating technology [37] can be used to improve the performance of air conditioning devices for the classroom and the lab. 4.…”

Section: Demonstratormentioning

confidence: 99%

Assessing Chinese campus building energy performance using fuzzy analytic network approach

Liu

Tang

et al. 2015

IFS

View full text Add to dashboard Cite

Abstract. Buildings were responsible for over 30% of total Chinese energy consumption in 2010. With a wild range of climate conditions and a separate air conditioning structure in campus buildings, it is significant but difficult to assess the energy performance of campus buildings in China. This paper proposes a novel mechanism to assess energy performance of campus buildings, using a fuzzy analytic network process (FANP). Six criteria are used as key performance indicators based on climate conditions in China and the air conditioning device deployment structure in campus buildings: 1) building envelope; 2) renewable energy; 3) illumination; 4) thermal comfort; 5) window and door; and 6) occupation status. A simulation is presented to illustrate the effectiveness of the proposed approach, analyzing three different rooms in the International School of Software, at Wuhan University. Assessment results are discussed in terms of optimizing future energy performance of campus buildings.

show abstract

“…3. Precooling technology [40] and preheating technology [37] can be used to improve the performance of air conditioning devices for the classroom and the lab. 4.…”

Section: Demonstratormentioning

confidence: 99%

Assessing Chinese campus building energy performance using fuzzy analytic network approach

Liu

Tang

et al. 2015

IFS

View full text Add to dashboard Cite

show abstract

“…Previous studies find that the performance of NDDCTs can be improved by wetted-medium evaporative pre-cooling when the ambient air is hot and dry [6][7][8]. The concept of wetted-medium pre-cooling of a NDDCT is illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

Selection of wetted media for pre-cooling of air entering natural draft dry cooling towers

Zhang

et al. 2017

Applied Thermal Engineering

Self Cite

View full text Add to dashboard Cite

HighlightsFour wetted media were comparatively studied for future pre-cooling design.Characteristics of wetted media suitable for pre-cooling were summarized.Media with middle efficiencies and pressure drops are superior for pre-cooling.Cellulose7060 is most promising for pre-cooling the 120m-high NDDCT. AbstractThe performance of natural draft dry cooling towers (NDDCTs) can be improved by wetted-medium evaporative pre-cooling. However, the pre-cooling benefit is season dependent and is significantly affected by wetted media. To further investigate the effect of wetted medium type on pre-cooling performance, the current study simulates a pre-cooled NDDCT using two typical types of wetted media, i.e., film (Cellulose7060 and PVC1200) and trickle (Trickle125 and Trickle100). A MATLAB program was developed and was validated against published data. The model was then used to carry out case study of a 120m-high NDDCT pre-cooled using the selected wetted media with fixed thickness of 300mm. Both the medium performance and pre-cooled NDDCT performance were compared to recommend the characteristics of wetted media promising for evaporative pre-cooling. Simulation finds that the media with high or low cooling efficiencies and pressure drops are not promising for the studied pre-cooling case while those media with middle cooling efficiencies and pressure drops intend to produce much performance enhancement and Cellulose7060 is a representative of such kind of medium. For the 120m-high NDDCT, the wetted-medium pre-cooling can raise the heat rejection rate of the tower without pre-cooling from 45MW to 92 MW, 76 MW, 68 MW and 65MW by Cellulose7060, PVC1200, Trickle125 and Trickle100, respectively at ambient temperature of 50℃ and humidity of 20%.

show abstract

“…The IPSEpro NDDCT model was analysed in isolation with identical inlet conditions specified and then compared against the results found by the MATLAB code utilised in (He, Gurgenci, Guan, & Alkhedhair, 2013). The largest magnitude of discrepancy was 0.84% with most values being significantly less.…”

Section: Appendix B -Nddct Model Validation -Comparison With Matlab Cmentioning

confidence: 99%

Design optimisation of an Australian EGS power plant using a natural draft dry cooling tower

Duniam¹

View full text Add to dashboard Cite

Enhanced Geothermal Systems (EGS) technology was successfully demonstrated in theAustralian context with the operation of the Habanero 1MW pilot plant. This project aims to determine the optimum power plant design for the geothermal parameters found at the Habanero pilot plant. In order to achieve this, a techno-economic optimisation of an Organic Rankine Cycle (ORC) was undertaken.The EGS conditions used in this work are a brine production well head temperature of 220 o C, and minimum brine temperature of 80 o C in order to limit scaling formation in the brine heat exchanger(s). The production well head pressure is 35 MPa and the required reinjection pressure is 45 MPa in order to maintain the desired mass flow rate of 35 kg/s through the EGS resource.A significant source of parasitic power consumption in ORC systems occurs in the condensing system. In order to avert this parasitic power consumption Natural Draft Dry Cooling Towers (NDDCTs) were investigated as the condenser for the ORC. A one dimensional NDDCT model was developed and integrated into the cycle design process to analyse and design for the coupled nature of NDDCT performance with the power cycle. As a base for comparison a one dimensional Mechanical Draft Air Cooled Tower (MDACT) model was developed and each cycle was also analysed with MDACT as the condenser.A wide range of organic working fluids and several cycle configurations were evaluated in the preliminary analysis using a simplified NDDCT model. The cycles were optimised for maximum net power generation and the highest performing cycle configurations were progressed to the techno-economic design point optimisation stage. The cost of each of the major equipment items in the plant was estimated using cost correlations based on historical equipment cost data. The condensing system geometry for both NDDCT and MDACT, heat exchanger geometry and cycle parameters were optimised to find the lowest Specific Investment Cost (SIC) in AUD/kWe for each candidate cycle. The cycle configurations with the lowest SIC from the design point analysis were evaluated across the range of ambient temperatures expected at the site. The mean annual net power generation for each cycle was calculated based on site temperature data and this was used in determining the annualised SIC values, the measure by which the optimum plant configuration was selected. IIThe recuperated, regenerative and basic ORCs were found to be the cycles that obtained the highest net power generation in the preliminary analysis with butane, butene, isobutene, R152a, isobutane, R123 and isopentane the highest performing fluids. The highest net power generation found in the preliminary analysis was 2.688 MWe.The NDDCT model developed in IPSEpro was investigated in isolation to find the optimum design configuration which gives the lowest SICcd, in AUD/kWth of heat rejected. The tower geometry ratios selected were: aspect ratio (tower height / base diameter) of 1.4, diameter ratio (outlet diameter / base diameter) of 0.7, and / 3 (the p...

show abstract

Pre-cooling with Munters media to improve the performance of Natural Draft Dry Cooling Towers

Cited by 74 publications

References 24 publications

Assessing Chinese campus building energy performance using fuzzy analytic network approach

Assessing Chinese campus building energy performance using fuzzy analytic network approach

Selection of wetted media for pre-cooling of air entering natural draft dry cooling towers

Design optimisation of an Australian EGS power plant using a natural draft dry cooling tower

Contact Info

Product

Resources

About