Energy balance equation
What is meant by the energy balance?
Energy is another word for “calories.” Your energy balance is the balance of calories consumed through eating and drinking compared to calories burned through physical activity. You burn a certain number of calories just by breathing air and digesting food.
How do you calculate material balance and energy balance?
MA = (mAP + mAW + mAU) where mAU is the unknown loss and needs to be identified. So the material balance is now: Raw Materials = Products + Waste Products + Stored Products + Losses where Losses are the unidentified materials. Just as mass is conserved, so is energy conserved in food-processing operations.
What is energy balance and why is it important?
Energy balance is important. When you consume too much energy and burn too little, your body stores that excess energy as body fat.
What are the main components of energy balance?
The basic components of energy balance include energy intake, energy expenditure, and energy storage. Body weight can change only when energy intake is not equal to energy expenditure over a given period of time. Humans take in energy in the form of protein, carbohydrate, fat, and alcohol.
What is an example of positive energy balance?
Examples of positive energy balance include periods of time around major seasonal event (e.g. during Christmas) when overeating and inactivity generally prevail, and during pregnancy and lactation when the body purposely increases its stores of energy.
What is energy balance in thermodynamics?
The balance is expressed in words as: all energies into the system are equal to all energies leaving the system plus the change in storage of energies within the system.
Why material balance is important?
Material balances are important first step when designing a new process or analyzing an existing one. Thus, material balances are often compared to the balancing of current accounts. They are used in industry to calculate mass flow rates of different streams entering or leaving chemical or physical processes.
What is a mass balance diagram?
Sometimes heat and mass balance is not a separate document but appears alongside the Process Flow Diagram (PFD). A heat and mass balance sheet represents every process stream on the corresponding PFD in terms of the process conditions. Normally a heat and mass balance sheet reports following data for a process stream.
What factors affect energy balance?
There are three main groups of factors—homoeostatic, environmental and behavioural processes—that interact and influence steady-state body weight. Alterations in any of these factors will result in changes to this steady-state and could result in obesity.
What are the consequences of not being in energy balance?
A severe negative energy balance can lead to a decline in metabolism, decreases in bone mass, reductions in thyroid hormones, reductions in testosterone levels, an inability to concentrate, and a reduction in physical performance. Yet a negative energy balance does lead to weight loss.
How can you keep your energy levels in balance all day?
Here are nine tips:Control stress. Stress-induced emotions consume huge amounts of energy. Lighten your load. One of the main reasons for fatigue is overwork. Exercise. Exercise almost guarantees that you’ll sleep more soundly. Avoid smoking. Restrict your sleep. Eat for energy. Use caffeine to your advantage. Limit alcohol.
What are the 3 components of energy expenditure?
Total energy expenditure can be defined in terms of the following three components: basal and resting metabolic rates; thermic effect of food (dietary thermogenesis); and physical activity (spontaneous physical activity and other physical activities of daily living).
What is the main source of energy of the human body?
Carbohydrates are the main energy source of the human diet. The metabolic disposal of dietary carbohydrates is direct oxidation in various tissues, glycogen synthesis (in liver and muscles), and hepatic de novo lipogenesis.