Costs of scrubbers on ship What are the costs of scrubbers? Scrubbers are increasingly being fitted to newbuildings but the majority now in operation have been retrofits. The time for a retrofit is currently more than a typical scheduled drydocking meaning that extra lost earning days add to the capital outlay. The capital cost of […]
Scrubbers on ships really work Long before scrubbers or even before SOx was considered an issue for the shipping industry it was being regulated around the globe in connection with the use of large diesel engines in power production and other shore-based industries. As a consequence, exhaust gas cleaning or scrubbing technology is already a long […]
Open loop and closed loop scubber system for ship Classification of Marine Scrubbers On the basis of their operation, marine scrubbers can be classified into Wet and Dry scrubbers. Dry scrubbers employ solid lime as the alkaline scrubbing material which removes sulphur dioxide from exhaust gasses. Wet scrubbers use water which is sprayed into the […]
A guide to scrubber system on ship Scrubbers or Exhaust Gas Cleaning Systems (EGCS) are used to remove particulate matter and harmful components, such as sulphur oxides (SOx) and nitrogen oxides (NOx) from the exhaust gasses generated as a result of combustion processes in marine engines, to implement pollution control. These scrubbing systems have been developed and employed […]
Challenges with the use of exhaust gas scrubbers There are concerns associated with both of the two most popular options to comply with IMO 2020; use of compliant fuels and SOx Exhaust Gas Cleaning Systems (EGCS), often referred to as scrubbers. However, what is important is that after an incident has occurred, the maritime industry […]
Preliminary heat exchanger design sizes Introduction – The Heat Exchanger Design Equation The basic heat exchanger design equation, Q = U A ?Tlm, was introduced and discussed in another article, “Fundamentals of Heat Exchanger Theory and Design.” When used as a design equation to calculate the required heat transfer surface area, the equation can be […]
Engineering Guide to Air Conditioners and HVAC Topics The articles in this guide are designed to help students and enthusiasts who are encountering these works for the first time in a high school, college, or work setting. Whether you’re looking for a detailed analysis of a technology, an explanation of a working methodology, or study […]
Modification of an Existing HVAC System to Improve Efficiency In the US, 40% of the total energy used is consumed by buildings, and HVAC consumes a substantial percentage of this energy. It is therefore in companies’ interest to decrease this energy use, and one way to do this is to improve the efficiency of the […]
Upgrades to Improve Efficiency for HVAC Providing air conditioning in the summer and heating in the winter, HVAC (Heating, Ventilation, dan Air-Conditioning) is an essential part of any building. Heat or cold air is supplied to the different rooms or offices by ducting and is normally thermostatically controlled. The following sections examine some modern methods […]
What is humidification process? Cooling and humidification What is Humidification Process? The process in which the moisture or water vapor or humidity is added to the air without changing its dry bulb (DB) temperature is called as humidification process. This process is represented by a straight vertical line on the psychrometric chart starting from the […]