Life Cycle Assessment of Greenhouse Gas Emissions: Comparison Between a Cooling Tower and a Geothermal Heat Exchanger for Air Conditioning Applications in Ecuador

ASME 2019 13th International Conference on Energy Sustainability Pub Date : 2019-12-03 DOI:10.1115/es2019-3907

F. Porras, Angel D. Ramirez, A. Walter, Guillermo Soriano

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引用次数: 2

Abstract

Cooling towers are widely used to remove heat in buildings with chilled water air conditioning systems. Moreira et al. [1] performed an experimental comparison between a cooling tower (CT) and a geothermal heat exchanger (GHE) in Guayaquil-Ecuador (hot/humid climate) and the results show an advantage of 39% of GHE systems regarding energy efficiency. This study compares the emissions of greenhouse gases (GHG), considering the results of the research mentioned above and comparing both systems. A life cycle assessment (LCA) approach was used to estimate the GHG emissions, assuming three scenarios for the electricity supply: the electricity generation mix in 2016, the planned electricity generation mix in 2025, and the profile for marginal electricity generation (peak demand). The estimated reduction of GHG emissions due to the use of GHE systems could be up to 50%. GHEs for building air conditioning applications is a technological option with potential to reduce energy consumption and GHG emissions. However, additional work is necessary to evaluate the complete environmental profile and its cost-effectiveness.

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温室气体排放的生命周期评估:厄瓜多尔空调应用冷却塔和地热热交换器的比较

冷却塔被广泛用于具有冷冻水空调系统的建筑物的散热。Moreira等人[1]在瓜亚基尔-厄瓜多尔(炎热/潮湿气候)对冷却塔(CT)和地热换热器(GHE)进行了实验比较，结果显示GHE系统在能源效率方面具有39%的优势。考虑到上述研究的结果，本研究比较了两个系统的温室气体(GHG)排放。使用生命周期评估(LCA)方法估算了温室气体排放，假设了三种电力供应情景:2016年的发电组合、2025年的计划发电组合和边际发电(峰值需求)的概况。由于使用GHE系统，估计减少的温室气体排放量可达50%。温室气体用于建筑空调是一种有潜力减少能源消耗和温室气体排放的技术选择。然而，需要进一步的工作来评价完整的环境概况及其成本效益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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ASME 2019 13th International Conference on Energy Sustainability

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