Characterization of thermal stratification in a horizontally-configured electric water heater (EWH) storage tank

This dataset encompasses data for static heating and cooling modes, as well as dynamic water events for a horizontally-configured domestic electric water heater (DEWH) with a capacity of 150 liters. The model name of the device is "Kwikot Superline". The tank is equipped with a heating coil having a nominal power of 3 kW and insulation which provides a B-class energy rating as per South African national standards (SANS) 151, which limits standing losses to 2.59 kWh/24h. The specimen tank is located in a laboratory within the Faculty of Electrical and Electronic Engineering at Stellenbosch University, South Africa. The data were collected using a custom-built test bench designed to assist in characterizing the thermal response of the specimen tank. The test bench has the capability to emulate and control ambient temperature using a climatic chamber, emulate inlet water temperature, mimic user behavior by controlling water usage patterns, and manage electrical switching frequencies and conditions for the heating element. Additionally, a custom data acquisition module was specifically designed and built for this purpose, highlighting the capture of thermal stratification within the tank, outlet water temperature, environmental temperatures (ambient and inlet water), energy usage, and water usage. The internal stratification measurement unit was designed and built to measure three-dimensional temperature distributions within the specimen tank, with the most significant data being the stratification data in the plane of gravity. Five different vertical busses were installed in the tank to measure stratification at different longitudinal locations within the tank. Although radial temperatures were also recorded, no significant differences were observed. Environmental and operational data, such as input power to the heating element, ambient (chamber) temperature, inlet water temperature, outlet water temperature, flow rate of water discharge events, and laboratory temperatures, were also recorded. Schematics of the test bench and internal temperature measurement device are provided in the "Schematics" folder, offering a reference to sensor locations that directly correspond to those seen in the datasets. A description of the dataset structure is also provided in the "Experimental Data" folder, which describes the variables, their corresponding data types, units, and formats. Please note that all provided datasets are raw and unprocessed. Data formats: CSV, JSON, MATLAB Data

本数据集涵盖一台水平安装、容量为150升的家用储水电热水器（domestic electric water heater，DEWH）在静态加热与静态冷却工况下的相关数据，以及该设备的动态水流事件数据。该设备的型号为"Kwikot Superline"。该储水罐配备额定功率3 kW的加热盘管，以及符合南非国家标准（SANS）151规定的B级能效保温层，其待机损耗被限定为2.59 kWh/24h。该测试样罐安置于南非斯泰伦博斯大学电气与电子工程学院的一间实验室中。本数据集通过定制搭建的测试台采集所得，该测试台专为表征该样罐的热响应特性而设计。测试台可通过气候箱模拟并控制环境温度，模拟进水温度，通过控制用水模式还原用户用水行为，并可调控加热元件的电气开关频率与运行工况。此外，项目还专门定制搭建了一套数据采集模块，用于采集罐内热分层、出水温度、环境温度（包括环境与进水温度）、能耗以及用水情况等数据。内部分层测量单元专为测量样罐内的三维温度分布而设计搭建，其中核心数据为重力平面内的热分层数据。测试罐内共安装5根不同的垂直测温母线，用于测量罐内不同纵向位置的温度分层。尽管同时记录了径向温度，但未观测到显著差异。测试同时记录了环境与运行参数，包括加热元件的输入功率、环境（箱内）温度、进水温度、出水温度、放水事件的水流速率以及实验室环境温度。测试台与内部测温装置的示意图已收录于"Schematics"文件夹中，可作为数据集对应传感器位置的参考依据。数据集结构说明已收录于"Experimental Data"文件夹中，该说明详细介绍了各变量、对应的数据类型、单位与格式。请注意，所有提供的数据集均为原始未处理数据。数据格式包括CSV、JSON以及MATLAB数据。