NDLI: Preliminary analysis and performance of a trans-critical CO2 heat pump

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2015 International Conference on the Industrial and Commercial Use of Energy (ICUE)

2014 International Conference on the Eleventh industrial and Commercial Use of Energy

2013 Proceedings of the 10th Industrial and Commercial Use of Energy Conference

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Table of contents

Simplified methods to evaluate industrial DSM project performance

An automated diagnostic system to streamline DSM project maintenance

Practical problems experienced with industrial DSM projects

Automated demand side management of clear water pumping and storage for shifting load out of Eskom's domestic peak in the mining industry

Demand Market Participation (DMP) on smaller energy users

Effective energy management: UK'S future goals

Load management projects at the Department of Water Affairs through an integrated systems approach

Valve solutions for mine dewatering systems

Limestone crushing plant load management

Integrating change management for/towards sustainable energy efficient management — A case study

Baseline service level adjustment methodologies for energy efficiency projects on compressed air systems in the mining industry

Real-time efficiency estimation of an electric motor

Dynamic compressor selection

Strategic placement of compressors for future mine developments

Energy audit of mine refrigeration water systems by means of simulation

Power savings by impeller replacements for main fan stations in the South African gold mining industry

Energy savings on mining compressed air networks through dedicated process plant compressors

Energy recovery from incoming high pressure cold water in deep level mines

Evaluating the efficiency benefits of DSM on mine compressed air systems

Electricity cost risk modelling of the Energy Conservation Scheme (ECS) for the gold mining industry of South Africa

Compressed air alternative solutions: Challenges encountered in deep level mining

Opportunities for the development of heat pump drying systems in South Africa

Heating, ventilation and air conditioning management by means of indoor temperature measurements

Energy performance of eco-friendly RE170 and R510A refrigerants as alternatives to R134a in vapour compression refrigeration system

Preliminary analysis and performance of a trans-critical CO2 heat pump

Energy efficient technologies and energy saving potential for cold rooms

Improving cooling system efficiency with pre-cooling

Energy management audit and recommendations at a tertiary institution

Highly efficient PVDF film energy harvester for self charging vehicle system

Basic measurement and verification approach for roll-out programmes

Measurement and Verification methodology, challenges and lessons learned of M&V on commercial heat pumps

Measurement and verification methodology for an energy efficiency improvement on the cooling auxiliary equipment in the mining industry

Application of model predictive control to dynamic economic emission dispatch with transmission losses

Prediction of Availability for new power plant in the absence of data

Renewable Energy Feed in Tariffs, REBID, SASGI and the Smart Grid

Smart grid — The next frontier

Future IPP's can benefit from the Dutch system of net metering for its national electricity supply grid

Smart interconnection of a PV/wind DG micro grid with the utility distribution network

The renewable energy adventure and a transition to a low-carbon South Africa

Thermal modelling of infrared heater for plastic waste gasification

Performance testing of a diesel engine running on varying blends of Jatropha oil, waste cooking oil and diesel fuel

Review of the strategic wind energy activities in South Africa

Cost-benefit to the cement industry by shifting evening load to off-peak periods

Reactive power: A simplified model to justify the cost of interventions

2011 Proceedings of the 8th Conference on the Industrial and Commercial Use of Energy

Preliminary analysis and performance of a trans-critical CO2 heat pump

Content Provider	IEEE Xplore Digital Library
Author	Maina, P. Zhongjie Huan
Copyright Year	2012
Description	Author affiliation: Department of Mechanical Engineering, Tshwane University of Technology, Pretoria 0001, South Africa (Maina, P.; Zhongjie Huan)
Abstract	A CO2 trans-critical water to water test bed was developed to study the output of a typical heat pump using. A data acquisition system was used to collect, store and reflect measurement from temperature, pressure and flow-rate sensors of the system. NIST REFPROP software was used to evaluate the thermophysical properties. A temperature-entropy diagram was used to present the output of a preliminary investigation of the system. Typical efficiency results in terms of coefficient of performance for the heat pump were varying from 3.7 to 3.9. These efficiencies were related to heat rejection values varying from 10.9 to 11.8 kW.
Starting Page	1
Ending Page	10
File Size	287468
Page Count	10
File Format	PDF
ISBN	9781467312417
ISSN	2166059X
e-ISBN	9780981431185
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-15
Publisher Place	South Africa
Access Restriction	Subscribed
Rights Holder	Cape Peninsula University
Subject Keyword	Temperature Fluids Heat pumps Heat pump Coefficient of performance Water heating Carbon dioxide Hybrid fiber coaxial cables Heating capacity Trans-critical cycle Refrigerants
Content Type	Text
Resource Type	Article

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