Energy Conversion and Transmission Characteristics Analysis of Ice Storage Air Conditioning System Driven by Distributed Photovoltaic Energy System

Table 2

Measuring instrument parameters and uncertainty.

Instrument	Model	Range	Accuracy	Application scope	Maximum relative error	Maximum absolute error	Uncertainty; ( class)
Pyranometer	Kipp & Zonen CMP-6	0–2000 (W/m^2)	±5%	0–1000 (W/m^2)	±10%	±100 W/m^2	57.7348 W/m^2
Thermocouples	T	−200 to 350 (°C)	±0.4%	0–150 (°C)	±0.93%	±1.4°C	0.8083°C
Wind speed transducer	EC-9S	0–70 (m/s)	±0.4%	0–10 (m/s)	±2.8%	±0.28 m/s	0.1617 m/s
Electromagnetic flow meter	KROHNE OPTIFLUX 5000	DN 5; 0–12 (m/s)	±0.15%	0–5 (m/s)	±0.36%	±0.018 m/s	0.0104 m/s
Pressure transducer	YOKOGAWA EJA430E	0.14–16 (MPa)	±0.055%	0–2 (MPa)	±0.44%	±0.0088 MPa	0.0051 MPa
Electronic balance	AHW-3	0–3 kg	±0.05 g	0–3 kg	±0.05%	±0.0015 kg	0.0009 MPa
Wattmeter	DELIXI DDS607	0–10000 kW·h	±0.01 kW·h	0–100 kW·h	±1%	±1 kW·h	0.5774 kW·h
Digital multimeter	FLUKE F-179	Voltage: 0–1000 V	±0.9%	0–380 V	±2.37%	±9.006 V	5.1996 V
		Current: 0–10 A	±1%	0–10 A	±1%	±0.1 A	0.0577 A