Life-cycle cost analysis for an incremental seismic rehabilitation project

Incremental seismic rehabilitation (ISR) consists of a set of discrete rehabilitation actions in order to decrease initial costs and to avoid long-lasting disruptions. Nevertheless, there are few cases of incrementally retrofitted buildings and few studies about its economic feasibility. The objective of this work is to evaluate the differences between incremental and single-stage rehabilitation in terms of economic losses during the building’s life span. For this purpose, this work analyzes three rehabilitation proposals to improve seismic performance of typical school buildings. Based on P58 FEMA (Federal Emergency Management Agency) methodology, expected repair costs and benefits were calculated for each rehabilitation intervention. Results confirm the potential of ISR for improving essential buildings.

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Economic feasibility of green office building: combining life cycle cost analysis and cost–benefit evaluation

Building Research & Information ◽

10.1080/09613218.2021.1896354 ◽

2021 ◽

pp. 1-15

Author(s):

Perdana Miraj ◽

Mohammed Ali Berawi ◽

Siti Rahma Utami

Keyword(s):

Life Cycle ◽

Cost Analysis ◽

Life Cycle Cost ◽

Cost Benefit ◽

Economic Feasibility ◽

Office Building ◽

Life Cycle Cost Analysis ◽

Benefit Evaluation

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Impact of module degradation on the viability of on-grid photovoltaic systems in Mediterranean climate: case of Shymkent Airport

10.21203/rs.3.rs-90791/v1 ◽

2020 ◽

Author(s):

Zhalgas Smagulov ◽

Adil Anapiya ◽

Dinara Dikhanbayeva ◽

Luis Rojas-Solórzano

Keyword(s):

Life Cycle Cost ◽

Mediterranean Climate ◽

Net Present Value ◽

Performance Degradation ◽

Economic Feasibility ◽

Cost Ratio ◽

Life Cycle Cost Analysis ◽

Aging Effects ◽

Financial Conditions ◽

Expected Performance

Abstract This paper presents the techno-economic feasibility analysis of an on-grid Photovoltaic Solar System (PVSS) subject to Mediterranean climate aging effects. The PVSS under study is considered installed on the roof of Shymkent airport, located in southern Kazakhstan. A PVSS performance degradation rate of 1.48%-per-annun was considered according to the Mediterranean climate prevailing in the location. A 25-year life-cycle cost analysis comparing the rated vs de-rated on-grid PVSS led to a positive Net Present Value (NPV), a less than 9-year equity payback, and favorable internal rate of return (IRR) and Benefit to Cost Ratio (BCR) in both conditions. The analysis demonstrates that despite the expected performance degradation associated to climatic aging, a convenient feed-in tariff (FIT) and attractive financial conditions, such as those present in Kazakhstan, conform a robust setting to promote on-grid PVSS in the country.

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Impact of Module Degradation on the Viability of On-Grid Photovoltaic Systems in Mediterranean Climate: The Case of Shymkent Airport

International Journal of Renewable Energy Development ◽

10.14710/ijred.2021.33485 ◽

2020 ◽

Vol 10 (1) ◽

pp. 139-147

Author(s):

Zhalgas Smagulov ◽

Adil Anapiya ◽

Dinara Dikhanbayeva ◽

Luis Rojas-Solorzano

Keyword(s):

Life Cycle Cost ◽

Mediterranean Climate ◽

Net Present Value ◽

Performance Degradation ◽

Economic Feasibility ◽

Life Cycle Cost Analysis ◽

Internal Rate Of Return ◽

Aging Effects ◽

Financial Conditions ◽

Expected Performance

This paper presents the techno-economic feasibility analysis of an on-grid Photovoltaic Solar System (PVSS) subject to Mediterranean climate aging effects. The PVSS under study is considered installed on the roof of Shymkent airport, located in southern Kazakhstan. A PVSS performance degradation rate of 1.48%-per-annun was considered according to the Mediterranean climate prevailing in the location. A 25-year life-cycle cost analysis comparing the rated vs. de-rated on-grid PVSS led to a positive Net Present Value (NPV), a less than 9-year equity payback, and favorable internal rate of return (IRR) and Benefit-to-Cost (B-C) ratio in both conditions. However, the de-rated PVSS system underperformed in 16.2%, 43.5% and 20% the IRR, NPV and B-C ratio, respectively. The analysis demonstrates that despite the expected performance degradation associated to climatic aging, a convenient feed-in tariff (FIT) and attractive financial conditions, such as those present in Kazakhstan, conform a robust setting to promote on-grid PVSS in the country.

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Analisis Biaya Hidup Aset pada Infrastruktur Pengangkatan Air Baku di Daerah Karst (Hal. 20-27)

RekaRacana: Jurnal Teknil Sipil ◽

10.26760/rekaracana.v4i3.20 ◽

2018 ◽

Vol 4 (3) ◽

pp. 20

Author(s):

Muhammad Luqman Nur Rouf Arifin ◽

Teuku Faisal Fathani ◽

Henricus Priyosulistyo

Keyword(s):

Life Cycle ◽

Life Cycle Cost ◽

Karst Area ◽

Life Cycle Cost Analysis ◽

Dry Valleys ◽

Present Value ◽

Solar Water ◽

Pumping System ◽

Water Pumping ◽

Repair Costs

ABSTRAKKawasan karst Gunungsewu yang terbentang dari Kabupaten Gunung Kidul, Wonogiri hingga Pacitan memiliki banyak lembah kering dan mengalami kelangkaan air permukaan. Kekeringan melanda saat musim kemarau datang, sedangkan pada saat musim penghujan, umumnya air ditampung di penampungan air hujan (PAH) sederhana. Adanya program Pengangkatan Air Tenaga Surya (PATS) di beberapa lokasi di Kawasan karst Gunungsewu telah berhasil membantu warga dalam mengurangi masalah kekeringan. Penelitian ini menganalisis biaya hidup aset infrastruktur pengangkatan air baku menggunakan energi terbarukan (PATS) dan Pengangkatan Air Tenaga Diesel (PATD) di daerah karst. Lokasi yang dipilih adalah di Dusun Banyumeneng, Kabupaten Gunung Kidul yang mulai beroperasi tahun 2016. Analisis biaya hidup aset meliputi biaya awal, biaya perawatan dan perbaikan, biaya penggantian komponen dan biaya penghapusan. Hasil analisis nilai kini aset menunjukkan bahwa nilai pada akhir umur layan PATS Banyumeneng sebesar (+)Rp66.240.298,00 untuk penggunaan energi surya, dan (-)Rp30.997.539,00 untuk penggunaan energi diesel. Nilai positif pada hasil analisis biaya hidup aset PATS menunjukkan bahwa infrastruktur PATS Banyumeneng menguntungkan secara ekonomi untuk dibangun dan beroperasi menggunakan tenaga surya.Kata kunci: biaya hidup aset, pengangkatan air tenaga surya, pengangkatan air tenaga diesel, nilai kini asset, karst Gunungsewu ABSTRACTThe Gunungsewu karst area which stretches from Gunung Kidul Regency, Wonogiri to Pacitan has many dry valleys and experiences a scarcity of surface water. Drought occurs when the dry season comes, while during the rainy season, water is generally stored in simple rainwater storage (PAH). The existence of a Solar Water Pumping System (PATS) in several locations in the Gunungsewu karst area has succeeded in helping residents in reducing drought problems. This study analyzes the life cycle cost of water supply infrastructure using renewable energy technology (PATS) and diesel technology (PATD) in the karst area. The chosen location was in Banyumeneng Hamlet, Gunung Kidul Regency which began operations in 2016. Analysis of life cycle cost includes initial costs, maintenance and repair costs, replacement costs and salvage value. Present value of assets show that the value at the end of the service life of PATS Banyumeneng is (+)Rp66,240,298.00 for the use of solar energy, and (-)Rp 30,997,539.00 for the use of diesel energy. The positive value on the results of the PATS life cycle cost analysis shows that the PATS Banyumeneng infrastructure is economically profitable to build and operate.Keywords: life cycle cost, solar water pumping system, diesel powered water pumping system, present value of asset, Gunungsewu karst area

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Comparison between Variable and Constant Refrigerant Flow Air Conditioning Systems in Arid Climate: Life Cycle Cost Analysis and Energy Savings

Sustainability ◽

10.3390/su131810374 ◽

2021 ◽

Vol 13 (18) ◽

pp. 10374

Author(s):

Georges Atallah ◽

Faris Tarlochan

Keyword(s):

Life Cycle ◽

Cost Analysis ◽

Life Cycle Cost ◽

Air Conditioning ◽

Sustainable Energy ◽

Economic Feasibility ◽

Life Cycle Cost Analysis ◽

Sustainable Solutions ◽

Present Worth ◽

Crf System

All over the world, there is a call to encourage sustainable energy thinking and implementation. There is an urgent need to consider sustainable solutions in any design projects that are able to reduce energy consumption. In the heating, ventilation, and air conditioning field, the rise of the variable refrigerant flow systems has made big progress. This study presents a life cycle cost analysis to evaluate the economic feasibility of constant refrigerant flow (CRF), and in particular, the conventional ducted unit air conditioning system and the variable refrigerant flow (VRF) system by using detailed cooling load profiles, as well as initial, operating, and maintenance costs. Two operating hours scenarios are utilized and the present worth value technique for life cycle cost analysis is applied to an existing office building located in Qatar, which can be conditioned by CRF and VRF systems. The results indicate that, although the initial cost of the VRF system is higher than that of the CRF system by 23%, the present worth cost of the VRF system is much lower than that of the CRF system at the end of the lifetime due to lower operating costs. There is also a significant energy saving of 27% by using VRF compared to the CRF. The implementation of these results on a national scale will promote the use of sustainable energy technologies such as the VRF system.

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