Drift or windage loss of cooling tower is normally provided by its manufacturer based on cooling tower design. It is very difficult to ignore the drift problem in a cooling tower. Theoretically, the evaporation quantity of water is 1.8 m 3 for every 10,00,000 Kcal heat rejected.Įvaporation Loss(m3/hr) = 0.00153 * Recirculation Rate (m3/hr) * Delta T #9. Evaporation Loss:Įvaporation Loss: It is the loss of water from a cooling tower by evaporation. Normally, the circulation rate is measured in m 3/hr #8. It is the flow rate of water which is circulated in the cooling tower. It is the total volume of water present in the whole circuit of the cooling tower including piping & equipment. Cooling Tower Effectiveness:ĬT effectiveness (%) = Range / (Range + Approach) *100 #6. This is the difference between the cooling tower outlet cold water temperature and ambient wet bulb temperature.Īpproach = Cold cooling water outlet – Wet bulb temperature #5. Range or Delta T = Hot cooling water inlet temp – Cold cooling water outlet temp #4. It is the difference between cooling water inlet temperature and outlet temperature. If the humidity is 100% then no evaporation is possible because air is completely saturated with water. Relative humidity simply represents how much moisture could be at a given temperature compared to the actual moisture present in the air. It doesn’t take account of relative humidity in the air. Wet bulb temperature of a cooling tower is measured by sling psychomotor. Wet bulb temperature is measured by the thermometer which is wrapped in a cloth called soak. Let’s start… Cooling Tower Calculations & Terminologies: #1. The allocation shall adequately reflect the contributions of the lines of business to the Solvency Capital Requirement referred to in Article 38(2) over the lifetime of the whole portfolio of insurance and reinsurance obligations.In order to understand cooling tower calculations, you need to understand some basic terminology & formulas. Insurance and reinsurance undertakings shall allocate the risk margin for the whole portfolio of insurance and reinsurance obligations to the lines of business referred to in Article 80 of Directive 2009/138/EC. Where insurance and reinsurance undertakings calculate their Solvency Capital Requirement using an approved internal model and determine that the model is appropriate to calculate the Solvency Capital Requirement referred to in Article 38(2) for each point in time over the lifetime of the insurance and reinsurance obligations, the insurance and reinsurance undertakings shall use the internal model to calculate the amounts SCR(t) referred to in paragraph 1.ģ. The basic risk-free interest rate r(t + 1) shall be chosen in accordance with the currency used for the financial statements of the insurance and reinsurance undertaking.Ģ. (d) r(t + 1) denotes the basic risk-free interest rate for the maturity of t + 1 years. (c) SCR(t) denotes the Solvency Capital Requirement referred to in Article 38(2) after t years (b) the sum covers all integers including zero (a) CoC denotes the Cost-of-Capital rate The risk margin for the whole portfolio of insurance and reinsurance obligations shall be calculated using the following formula: RM= CoC · sum(t>=0)SCR(t)/(1+r(t+1))^t+1 where:
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