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Are you using the right heater in your office?

15 May 2024 | Story Valentino Ndaba | Photo Supplied

Heaters — Embrace the warmth of safety: Stay cozy with approved quartz heaters such as the Goldair GHQ-100G, keeping our campus secure and snug.

As winter approaches, the University of the Free State (UFS) is expecting increased heater usage. The Department of University Estates is proactively addressing this surge in energy demand caused by colder weather to safeguard our campuses and help mitigate the risk of loadshedding, ensuring uninterrupted operations for our staff and students.

By addressing the surge in energy demand caused by colder weather and promoting energy-efficient practices, UFS aims to play its part in alleviating the strain on the power system and contributing to national efforts to mitigate loadshedding.

With South Africa enjoying a recent break from loadshedding, Nicolaas Esterhuysen, Director of Engineering Services, stresses the importance of wise electricity usage to prevent outages and maintain safety. “During this uninterrupted power supply, it’s crucial to be mindful of our electricity usage, especially regarding heating in winter,” Esterhuysen emphasises. “By adopting energy-efficient practices, we contribute to the university’s energy-efficiency goals and create a safer environment."

In line with promoting energy efficiency, the Office for Occupational Health and Safety (OHS) is rolling out a comprehensive campaign to remove unauthorised heaters, minimising fire risks in residential and office areas.

Thato Block, Deputy Director of OHS, explains: “With the structural fire season approaching, UFS is prioritising campus safety. As colder weather looms, heaters and other warming devices will be in high demand, prompting preemptive action. OHS and the Electrical workshop will commence removing unauthorised heaters from residences and offices starting May 2024.”

Guidelines for heater usage

To ensure compliance and safety, UFS has established specific guidelines for electrical heater usage on its premises. The Standard Operating Procedure (SOP) outlines permissible and prohibited heater types, along with safety measures.

According to the SOP, only quartz heaters meeting specific criteria, such as the Goldair GHQ-100G model, are permitted on campus. These heaters are designated for offices without air conditioning, prioritising energy efficiency and safety. Furthermore, heaters are not permitted in residences due to the presence of centralised heating systems.

Prohibited models like bar, fan and oil heaters are strictly banned due to their high energy consumption and fire risks. Any unauthorised heaters found on campus will be confiscated to prevent electrical circuit overload and ensure emergency power system reliability.

In addition to regulating heater types, the UFS has implemented a stringent purchasing procedure overseen by the Department of University Estates Electrical Engineers. Approval is required before requisitioning heaters, with only quartz heaters meeting purchase criteria. This proactive approach aims to effectively manage electricity consumption, especially during peak demand periods in winter.

Safety precautions

The UFS community is reminded to exercise caution when using heaters, including maintaining a clutter-free environment around the device, and avoiding covering it. It’s also important to ensure adequate distance between the heater and flammable materials, switch off heaters when unattended, and disconnect them from power sources during prolonged periods of non-use.

Commitment to campus safety

The UFS remains committed to prioritising the safety and well-being of its community. Through proactive measures and fostering safety awareness, the university aims to create a secure environment conducive to teaching and learning throughout the year.

News Archive

Research helps farmers save with irrigation

2017-02-15

Description: Irrigation research Tags: Irrigation research

Marcill Venter, lecturer in the Department of
Agricultural Economics at the University of the
Free State, has developed the mathematical
programming system, Soil Water Irrigation
Planning and Energy Management in order to
determine irrigation pump hours.
Photo: Rulanzen Martin

Her advice to farmers is that they should make sure they are aware of the total cost (investment and operating costs) of an irrigation system. In most cases the investment cost is low, but the operating cost over the lifetime of the system is high.

“It is very important to have a look at the total cost and to install the most economic system,” says Marcill Venter, lecturer at the University of the Free State (UFS), who has done research on the economic sustainability of water-pipe systems.

Irrigation systems important components for farming
This research comes at a time when many farmers are relying on their irrigation systems due to persistent drought and low rainfall during 2016. South Africa has also experienced an abnormal increase in electricity tariffs in recent years. Due to tariff increases which threaten the future profitability of irrigation producers, the Water Research Commission (WRC) has launched and financed a project on the sustainable management of irrigation farming systems. “I had the opportunity to work on the project as a researcher,” says Venter.

The heart of every irrigation system is the water pipes that bring life to crops and livestock, and this is what Venter’s research is about. “Water pipes are part of the whole design of irrigation systems. The design of the system impact certain factors which determine the investment and operating costs,” she says.

Mathematical system to help farmers
Venter and Professor Bennie Grové, also from the Department of Agricultural Economics at the UFS, designed the Soil Water Irrigation Planning and Energy Management (SWIP-E) programming model as part of the WRC’s project, as well as for her master’s degree. “The model determines irrigation pump hours through a daily groundwater budget, while also taking into account the time-of-use electricity tariff structure and change in kilowatt requirements arising from the main-line design,” says Venter. The model is a non-linear programming model programmed in General Algebraic Modeling System (GAMS).

Design of irrigation system important for sustainability
The main outcome of the study is that the time-of-use electricity tariff structure (Ruraflex) is always more profitable than the flat-rate structure (Landrate). The interaction between the management and design of a system is crucial, as it determines the investment and operating costs. Irrigation designers should take the investment and operating cost of a system into account during the design process. The standards set by the South African Irrigation Institute (SAII) should also be controlled and revised.

Water-pipe thickness plays major role in cost cuts
There is interaction between water-pipe thickness, investment and operating costs. When thinner water pipes are installed, it increases the friction in the system as well as the kilowatt usage. A high kilowatt increases the operating cost, but the use of thinner water pipes lowers the investment cost. Thicker water pipes therefore lower the friction and the kilowatt requirements, which leads to lower operating costs, but thicker pipes have a higher investment cost. “It is thus crucial to look at the total cost (operating and investment cost) when investing in a new system. Farmers should invest in the system with the lowest total cost,” says Venter.

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