Concerns over the environmental impact of the high usage of fossil fuels to heat water in public, residential, commercial, and industrial sectors have triggered increased interest in solar energy. Hospitals and hotels utilize large amounts of energy in water heating. A case study of one such facility was conducted at the National University of Malaysia Hospital (HUKM). At the hospital, large amounts of LPG were consumed by two boilers resulting in the release of considerable amounts of greenhouse gases. A solar water heater (SWH) was designed and integrated with existing LPG burners to develop a hybrid SWH system. The SWH system is composed of 144 U-type pipe evacuated solar panels divided into three blocks. Each block consists of 12 strings of panels connected in parallel, with each string comprising 4 panels. In 2012, the annual average solar irradiation in Kuala Lumpur was 4.5 kW/m2/day. TRNSYS simulation software was used to predict the SWH performance before the design was finalized. Energy savings were expected to reach 60% based on the results of a simulation. However, 51% of LPG was saved according to data recorded throughout 2012. Solar water heating has promising industrial applications such as heat processing in textile factories, food processing, animal husbandry, dairy processing, aquaculture, swimming pool heating, and industrial and manufacturing facilities, with 59.9% annual average energy efficiency and 5.0% annual average exergy efficiency.
Large-scale solar water heater Evacuated tube U-pipe solar panel CO2 emission reduction Exergy analysis Carbon credit
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Ayompe LM et al (2011) Validated TRNSYS model for forced circulation solar water heating systems with flat plate and heat pipe evacuated tube collectors. Appl Therm Eng 31(8–9):1536–1542CrossRefGoogle Scholar
Borel L, Favrat D (2010) Thermodynamics and Energy Systems Analysis From Energy To Exergy. Engineering sciences. Mechanical engineering. CRC. Taylor and Francis Group, LLC, Boca Raton, FLGoogle Scholar
Calise F et al (2013) Dynamic simulation of a novel high-temperature solar trigeneration system based on concentrating photovoltaic/thermal collectors. Energy 61(0):72–86CrossRefGoogle Scholar
Carrillo Andrés A, Cejudo López JM (2002) TRNSYS model of a thermosiphon solar domestic water heater with a horizontal store and mantle heat exchanger. Sol Energy 72(2):89–98CrossRefGoogle Scholar
Chow TT et al (2009) Energy and exergy analysis of photovoltaic–thermal collector with and without glass cover. Appl Energy 86(3):310–316CrossRefGoogle Scholar
Duffie JA, Beckman WA (1980) Solar Engineering of Thermal Processes, 2nd edn. John Wiley & Sons Inc, New York, NYGoogle Scholar
Elmosbahi MS et al (2012) An experimental investigation on the gravity assisted solar heat pipe under the climatic conditions of Tunisia. Energy Convers Manag 64(0):594–605CrossRefGoogle Scholar
Fisch MN, Guigas M, Dalenbäck JO (1998) A review of large-scale solar heating systems in europe. Sol Energy 63(6):355–366CrossRefGoogle Scholar
Foster R, Ghassemi M, Cota A (2009) Solar energy: renewable energy and the environment. CRC Press, Taylor and Francis Group, LLC, Boca Raton, FLGoogle Scholar
Fujisawa T, Tani T (1997) Annual exergy evaluation on photovoltaic-thermal hybrid collector. Sol Energy Mater Sol Cells 47(1–4):135–148CrossRefGoogle Scholar
Gang P et al (2012) Experimental study and exergetic analysis of a CPC-type solar water heater system using higher-temperature circulation in winter. Sol Energy 86(5):1280–1286MathSciNetCrossRefGoogle Scholar