Payback period for residential solar water heaters in Taiwan

Research output: Contribution to journalReview article

26 Citations (Scopus)

Abstract

Taiwan is a leaf-shaped island straddling the Tropic of Cancer with abundant and reliable supply of solar energy. Under the individual circumstances (solar radiation, ambient temperature and hot water consumption pattern), solar heating could be economically competitive with conventional heating fuels (electricity, natural gas or liquefied petroleum gas). In this context, the market of residential solar water heaters (SWHs) in Taiwan has been highly developed with subsidy programs offered by the government of Taiwan so far. Next, the economic viability of residential SWHs is determined by the life-cycle savings. This study develops a procedure for estimating the payback period of residential SWHs in terms of operation cost and effective energy savings over conventional heating fuels. A case study in southern Taiwan indicates that the increase in daily load volume per area of solar collector installed has a beneficial effect. An end user should determine the economically optimal solar collector area of an SWH according to the hot water consumption pattern of each household. Payback period is shorter when the substituted conventional fuel is electricity. With the subsidy program, an SWH is in a favorable situation when compared with an electrical water heater. Findings of the present study would assist partially system design of residential SWHs and help accrue more monetary benefit to the end users.

Original languageEnglish
Pages (from-to)901-906
Number of pages6
JournalRenewable and Sustainable Energy Reviews
Volume41
DOIs
Publication statusPublished - 2015 Jan

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Solar water heaters
Solar collectors
Electricity
Water heaters
Heating
Tropics
Solar heating
Liquefied petroleum gas
Solar radiation
Solar energy
Water
Life cycle
Natural gas
Energy conservation
Systems analysis
Economics
Costs

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment

Cite this

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title = "Payback period for residential solar water heaters in Taiwan",
abstract = "Taiwan is a leaf-shaped island straddling the Tropic of Cancer with abundant and reliable supply of solar energy. Under the individual circumstances (solar radiation, ambient temperature and hot water consumption pattern), solar heating could be economically competitive with conventional heating fuels (electricity, natural gas or liquefied petroleum gas). In this context, the market of residential solar water heaters (SWHs) in Taiwan has been highly developed with subsidy programs offered by the government of Taiwan so far. Next, the economic viability of residential SWHs is determined by the life-cycle savings. This study develops a procedure for estimating the payback period of residential SWHs in terms of operation cost and effective energy savings over conventional heating fuels. A case study in southern Taiwan indicates that the increase in daily load volume per area of solar collector installed has a beneficial effect. An end user should determine the economically optimal solar collector area of an SWH according to the hot water consumption pattern of each household. Payback period is shorter when the substituted conventional fuel is electricity. With the subsidy program, an SWH is in a favorable situation when compared with an electrical water heater. Findings of the present study would assist partially system design of residential SWHs and help accrue more monetary benefit to the end users.",
author = "Lin, {W. M.} and Chang, {K. C.} and Chung, {K. M.}",
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Payback period for residential solar water heaters in Taiwan. / Lin, W. M.; Chang, K. C.; Chung, K. M.

In: Renewable and Sustainable Energy Reviews, Vol. 41, 01.2015, p. 901-906.

Research output: Contribution to journalReview article

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N2 - Taiwan is a leaf-shaped island straddling the Tropic of Cancer with abundant and reliable supply of solar energy. Under the individual circumstances (solar radiation, ambient temperature and hot water consumption pattern), solar heating could be economically competitive with conventional heating fuels (electricity, natural gas or liquefied petroleum gas). In this context, the market of residential solar water heaters (SWHs) in Taiwan has been highly developed with subsidy programs offered by the government of Taiwan so far. Next, the economic viability of residential SWHs is determined by the life-cycle savings. This study develops a procedure for estimating the payback period of residential SWHs in terms of operation cost and effective energy savings over conventional heating fuels. A case study in southern Taiwan indicates that the increase in daily load volume per area of solar collector installed has a beneficial effect. An end user should determine the economically optimal solar collector area of an SWH according to the hot water consumption pattern of each household. Payback period is shorter when the substituted conventional fuel is electricity. With the subsidy program, an SWH is in a favorable situation when compared with an electrical water heater. Findings of the present study would assist partially system design of residential SWHs and help accrue more monetary benefit to the end users.

AB - Taiwan is a leaf-shaped island straddling the Tropic of Cancer with abundant and reliable supply of solar energy. Under the individual circumstances (solar radiation, ambient temperature and hot water consumption pattern), solar heating could be economically competitive with conventional heating fuels (electricity, natural gas or liquefied petroleum gas). In this context, the market of residential solar water heaters (SWHs) in Taiwan has been highly developed with subsidy programs offered by the government of Taiwan so far. Next, the economic viability of residential SWHs is determined by the life-cycle savings. This study develops a procedure for estimating the payback period of residential SWHs in terms of operation cost and effective energy savings over conventional heating fuels. A case study in southern Taiwan indicates that the increase in daily load volume per area of solar collector installed has a beneficial effect. An end user should determine the economically optimal solar collector area of an SWH according to the hot water consumption pattern of each household. Payback period is shorter when the substituted conventional fuel is electricity. With the subsidy program, an SWH is in a favorable situation when compared with an electrical water heater. Findings of the present study would assist partially system design of residential SWHs and help accrue more monetary benefit to the end users.

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