MLA style: "Energy and environmental analysis of residential hot water systems: a study for Ontario, Canada." The Free Library.ICS systems show higher sensitivity to profile shape as they cannot meet hot water load during morning and evening times this morning and evening hot water load is met by the auxiliary heating tank. The solar storage tank helps glycol systems meet the demand for hot water during hours of low sunlight (early morning and late evening). This difference between the two systems is due to the presence of a well-insulated solar storage tank in the glycol system.The glycol system shows less variation in performance due to variation in draw profile than the ICS system due to the presence of an appropriately sized and insulated solar storage tank in the glycol system. Passive (ICS) systems display high sensitivity to hot water profile shape. The annual simulations were conducted in TRNSYS using a five minute time-step.Active (glycol) systems show greatest variation in simulated performance due to large changes in annual load. The base profile has morning and evening hump and a daily hot water load of 60 gallons on weekdays and 75 gallons on weekends. Daily hot water draw profiles developed at NREL (National Renewable Energy Laboratory) were used as the base draw profiles. The components were sized adequately using accepted component sizing guidelines. The system components of both active and passive system solar hot water systems simulated were determined by market research. The effect of changing these parameters was quantified by studying change in annual solar fraction and annual system efficiency.Active and passive SDHW system construction was first defined. Annual hot water load, mains water temperature, daily hot water load profile shape, and daily hot water load were the parameters varied to simulate variations in load and usage patterns that we expect would occur in a household. The objective of this research is to understand, using computer simulation, the effects of changing domestic hot water load and usage patterns on the system performance of active and passive solar domestic hot water (SDHW) systems.
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